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The paper presents the investigation of gyroscopic sensor noise properties used in the construction of body position detection device for posturographic testing. The first part shows the sources of noise in gyro sensors and their measurement methods. In the second part of the paper, the authors describe their own research on the efficiency of the calculation of the Allan variance (one of the popular...
High-Throughput Data Acquisition Systems are an essential part in many scientific experiments, and the processing of the large amount of data, represents a challenge in designing systems capable of managing such volume of data. Owing to the nature of this type of experiments, the processes responsible for gathering the data from devices that measure real-world phenomena, and those processes in charge...
The paper presents microcontroller-based interface for testing of piezoelectric vibration energy harvesters testing and measurement of their parameters. The interface is proposed as a low-cost solution for laboratory stands with electrodynamic shakers. The proposed system contains power processing circuits for piezoelectric harvesters. The microcontroller sets circuit interconnections suitable for...
MEMS are one of the fastest developing branch in microelectronics. Many integrated sensors are widely used in smart devices i.e. smartphones, and specialized systems like medical equipment. In the paper we present the main parts of a system for measuring human movement which can be used in human balance disorder diagnosis. We describe our design of capacitive accelerometers and dedicated switched-capacitor...
The increasing complexity of scientific experiments puts a large number of requirements on the systems, which need to control and monitor the hardware components required for the experiments. This article discusses three different technologies of developing Human Machine Interface (HMÏ) for the Piezo Control System (PCS) developed at the Lodz University of Technology (TUL). The purpose of the PCS...
Meaningful progress in the fields of MEMS is associated with the continuous development of the micromachining technologies. One of the most promising devices in MEMS is thermal sensors. When the first microbolometer appeared on the market, a huge interest in thermal detectors was observed. This paper is a short overview study on microbolometer geometry, different solutions and possibilities to implement...
The production of stereoscopic motion pictures has been recently getting increasingly popular. To provide the best quality of the resulting image, the parameters controlled must precisely correspond to the values calculated by the stereoscopic image analysis platform or chosen by a camera operator. Currently no integrated system exists, which can provide remote monitoring and control of the parameters...
The paper presents an analysis of objective evaluation of speech quality. As an example, the recovering process after stroke for patients with vascular lesion of a central nervous system has been taken into account. Application of neural networks gives possibility for objective evaluation of speech quality of patient suffering from disorder of speech motor.
A variety of thermal models has been proposed to predict the temperatures inside modern processors. In this paper, we describe and compare two such approaches, a detailed FEMbased simulation and a simpler architectural compact model. It is shown that both models provide comparable results when it comes to predicting the maximal temperature, however there are also non-negligible differences when estimating...
The data acquisition systems must be capable of process all the data produced by the source to ensure the highest level of accuracy, especially when it deals with hard real-time system monitoring task. However, the production of data is faster than the process to acquire and to process such a data. Using concurrency approach is an alternative to obtain the required level of performance and data processing...
Most of the modern industrial automation systems are based on Programmable Logic Controllers (PLC). Vast selection of communication networks are available for automation system designers. Nevertheless, contemporary standards were not designed with real-time wireless sensor networks in mind. Based on our experience in IEEE 802.15.4 networks and automation fields we discuss possible means which can make...
The beam intensity (number of particles forming the beam) in the Large Hadron Collider (LHC) is measured by eight current transformers. The average beam current is monitored by the four DC Current Transformers (DCCTs) and the range from a few hundred hertz to over a gigahertz is covered by the four Fast Beam Current Transformers (FBCTs). During the early run of the LHC the beam intensity measured...
In this paper an extension of thermal influence coefficients method to frequency domain has been presented. The method allowed the steady-state analysis of three-dimensional heat flow in multilayered structures. The presented modelling is based on Fourier and Hankel transforms, two-port network theory and correction coefficients for close-area distances, allowing emulation of finite heat sources by infinitesimal...
This paper discusses possibilities of enable and power-down functionality implementation in HV SoI unity-gain buffers. Modifications of selected HV buffer structures are analyzed. Approaches of power-down, high input and output impedance functionality implementation are introduced and discussed.
This article presents methodology of simple model building for risk stratification of sudden cardiac death based on an original ECG signal analysis platform. The method includes the analysis of the ECG signal extraction of selected parameters and model optimization for predicting sudden cardiac death.
The paper describes two particular applications of image processing for the purpose of analysis and simulation in the field of cardiology. The authors describe a method which allows for combining the 2D image obtained in ECHO examination, and a 3D model of heart, extracted from a set of CT slices. The fused image provides an intuitive view on the contractual function of heart, by overlaying the bull's...
As a result of a growing interest in the xTCA systems by research centers conducting High Energy Physics (HEP) experiments, the PICMG xTCA for Physics Coordinating Committee is developing a new, attractive standards. They are specifically dedicated to control and data acquisition systems of HEP applications. These new specifications define a number of extensions to the Advanced Telecommunications...
The High Energy Physics (HEP) experiments, due to their large scale, required performance and precision, have to be controlled by complex, distributed control systems. The systems are responsible for processing thousands of signals from various sensors of different types. Very often, one of the data sources applied in such systems are visible light/infrared cameras or other imaging sensors, which...
A novel method to employ PC-based solutions in evaluation of burn wounds is presented. The proposed approach utilises a computer program, guiding the physician through the procedure and allowing to process infrared and visible light images of the burn wound. Ability to interact with selected models of commercially available thermovision cameras is provided.
An approach to design of a current-controlled slew-rate adjustable trapezoidal waveform generators is presented. The paper presents circuit abilities of control over shape of output waveform, as well as possibility of a generator adaptation for operation in high-voltage applications, without any profound structure modifications.
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