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A calibration of various microphones that have different characteristics is very difficult. This paper presents a feature extraction method as an alternative. The method provides acoustic features that are strongly robust against various characteristic transfer functions. The proposed method applies Local Binary Patterns (LBP) and Compressive Sensing (CS) which compare spectral details with spectral...
This paper proposes a new method of time delay estimator, TDE, which can deal with transient state detection of arriving signals. The detected signals must be well-known or predicted such as periodic signals, repeated impinging signals, waves from controllable sources and so forth. The proposed method is familiar to a model-based parameter estimator, MBPE. A non-uniform sampling analysis, at the same...
This paper presents an exact solution of a specific Direction Of Arrival (DOA) estimation problem which is consistent with a proposed sufficient condition. Additionally, the solution in each dimension can be obtained separately. An experiment shows that the proposed method can estimate a DOA solution immediately and more efficiently.
In an earthquake monitoring system, seismic waves are analyzed by experts or computer software to determine a magnitude and to locate the hypocenter of the earthquake. A common method for locating the hypocenter is the optimization of the least square error approach, LSE, where at least three distance values gathered from three or more different monitoring stations are required. This paper presents...
This paper presents a single-axis trajectory generator for point-to-point motion control. Generated profiles are trapezoidal velocity that can “on-the-fly” modify system parameters such as the current destination, speed and acceleration without introducing any overshoots or fluctuations. Simulation results show that the proposed discrete-time and online calculation method guarantees finite step convergence...
A seismic event trigger is one of the key features of field seismometers. The classical Short Time Average and Long Time Average ratio (STA/LTA) trigger has been widely used but there are still some limitations. More advanced techniques for seismic event triggers have been proposed; however, they mostly require a rather high level of computational resources. This paper discusses an implementation...
Behaviour inspection of huge dams is a very important procedure for dam failure prevention as early fault detection could reduce potential losses or damages. Traditionally, a behaviour inspection requires a lot of man-power and is not practical in some situations where critical inspection points are not accessible. This paper presents a design and implementation of Supervisory Control and Data Acquisition...
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