Showing papers in "Measurement in 2007"

TL;DR: In this article, a method of fault feature extraction based on intrinsic mode function (IMF) envelope spectrum is proposed to overcome the limitations of conventional envelope analysis method by utilizing the proposed feature extraction method, the disadvantages of conventional analysis method such as the chosen of central frequency of filter with experience in advance, looking for spectral line of fault characteristic frequencies in envelope spectrum and so on could be overcome.

TL;DR: In this article, a self-decoupled wrist force/torque sensor for Haptic-based human-computer interaction (HapHCI) is proposed, which can measure the multi-dimensional interactive force between human hand and interaction device such as hand-controller, joystick, limb rehabilitation device, etc.

TL;DR: In this article, the authors presented a novel sensing methodology with an extended Kalman-based fusion algorithm for attitude estimation, using inexpensive micromachined gyroscopes, accelerometers and magnetometers.

TL;DR: In this paper, the authors proposed the concept of time-frequency entropy based on Hilbert-Huang transform and proposed a gear fault diagnosis method based on timefrequency entropy, which could identify gear status with or without fault accurately and effectively.

TL;DR: In this paper, the authors evaluated the sources of uncertainty for two types of humidity sensors, i.e., calibration equation, reference humidity source, temperature variation effect, nonlinear and repeatability, and resolution source.

TL;DR: In assessing the utility of a test, two issues stand out: whether it provides information of interest to test consumers, and whether scores generated by the test assist in making good decisions as mentioned in this paper.

TL;DR: A system for the remote monitoring and control of complex stand-alone photovoltaic plants based on the GSM network and, in particular, on the short text message service for more general, flexible and cost-effective implementation.

TL;DR: In this article, the effects of sampling and quantization on surface topography parameters were examined and the real and simulated surfaces of various character (deterministic or random) were the objects of investigations.

TL;DR: In this paper, a wearable force sensor system for human dynamics analysis is presented, where forces and moments are detected by combining responses from eight load cells fabricated on a parallel connection foundation.

TL;DR: In this article, a landmine detector based on 14 N-NQR spectroscopy was presented, which was used for RDX and HMX detection in landmines using a planar r.f. measure coil.

TL;DR: In this article, a second-order differential equation with unknown coefficients is proposed to estimate the model parameters from sinusoidal calibration measurements, and an estimation procedure based on linear least squares is presented.

TL;DR: In this article, an accelerometer-based thin balance system for measuring aerodynamic forces on typical flight configurations in impulse facilities is described. But the model and the balance system are supported by rubber bushes, which leads to minimally restrained free cooling conditions of the model in the test section during the test duration.

TL;DR: The proposed and implemented an efficient and reliable backup scheme for bridge monitoring systems using a wireless sensor network to gather the related environmental parameters and to transmit the numerical data to the gateway through multiple-hopping relay.

TL;DR: A wearable micro-sensing device for monitoring human body falls that can monitor the user to get immediate help by sending an emergency message to an aid station at the moment of falling, and has the ability to collect, analyze, and transmit data by monitoring the user’s body.

TL;DR: In this article, a tool based on the principle of X-ray absorption was developed at Glasgow Caledonian University to carry out multi-dimensional moisture content measurements under transient conditions.

TL;DR: In this paper, a low-cost interface for dielectric measurements with pulsed or time-harmonic excitation is described, covering the frequency range from 30 Hz to 15 MHz.

TL;DR: It will be worked out that data fusion and data mining can easily be discussed in the well-known framework of this reconstruction process and therefore should be considered as integral parts of metrology.

TL;DR: In this article, a method for monitoring the performance degradation in a heat exchanger is presented, based on the use of an adaptive observer which estimates the overall heat transfer coefficient U.

TL;DR: In this paper, an Alkaline Manganese dioxide (MnO2) sensor was fabricated in the laboratory as suitable as an embeddable use into the concrete structures and the electrochemical stability of sensor in concrete environments was examined in saturated calcium hydroxide solutions, a synthetic concrete pore solution and an extracts obtained from ordinary Portland cement.

TL;DR: This paper has studied two statistical classifiers: Mahalanobis and Minimum distance based, with new features of ECG (electrocardiogram) beats, with third-order cumulant, wavelet entropy, and AR (auto-regressive) coefficients as features.

TL;DR: In this paper, the authors used the differential laser Doppler technique to measure one-dimensional in-plane motions in micro-electro-mechanical systems and derived the displacement from the integral of velocity.

TL;DR: In this paper, a low-cost portable hand-held laser scanner along with a piece of glass used as a hand support was used to reduce scanning shadow areas and minimize involuntary movement of the hand during the 3D scanning process.

TL;DR: A more comprehensive analysis than the one done in the DYNAD draft standard is presented of the cosine-class windows in analog-to-digital converter dynamic testing by spectral analysis when the coherent sampling condition cannot be fulfilled.

TL;DR: The proposed EEG system can be used in the department’s biomedical laboratory and it has two signal channels, but it can be extended to six channels construction.

TL;DR: This work presents the best method to calibrate micropipettes according to the describe measurement conditions and a model for the calculation of the measurement uncertainty is described.

TL;DR: In this article, a new class of K-D fault diagnosis methods of analog parts in embedded mixed-signal micro systems based on microcontrollers is presented, which consist of three stages: a pre-testing stage of a fault dictionary creation, a measurement stage based on the measurement of voltage samples of the time response on a stimulating square impulse of the analog part realized by internal resources of the microcontroller and a fault detection and localization stage performed by the micro controller.

TL;DR: In this article, a measurement system was proposed to conduct real-time measurement of predicted mean vote (PMV), which is a well-recognized thermal comfort index for human beings but it is a complicated mathematical function.

TL;DR: In this paper, a reliable, cost effective non-contact testing system for MEMS characterization is proposed in order to overcome the intrinsic limitations of microfabrication processes and material conditions.

TL;DR: The practical utility of a neuro-fuzzy state-space model development procedure is aptly demonstrated by employing the best trained model to design a stable fuzzy state controller and implementing it in real life for the same flexible robotic arm.

TL;DR: In this article, the authors proposed a simplified and effective mass estimation algorithm under practical vibration modes, where the output signals from the conveyor belt scales are always contaminated with noises due to vibrations of the conveyors and the product in motion.