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The paper deals with simultaneous psychological application of two biosensor probes developed by two research groups. The first biosensor “Biosense” measures human surface biopotentials (namely cardiac activity (ECG)) and physical activity (acceleration). The second sensor “EDA-ring” measures resistance of human skin, so called electro-dermal activity (EDA).
This paper explains problematic of EMG (electromyography) signal measurements. Described experiments are partition of complex project “MEDISYS” dedicated to design of modern medical equipment, consisting the latest technologies and IC. The design is based on low noise wireless measurement block (for ECG, EMG and EEG monitoring) followed by actuator block with mechanical constructions and control electronic.
This work presents differential amplifier designated as a part of modular biomedical sensor system (MBSS) used for EMG (electromyography) signal measurements. Except the standard features which characterize this type of device (high gain, low noise), some special requirements comprising very low supply voltage and low power consumption could be reached by application of the described amplifier. The...
Miniaturization of biomedical sensors has increased the importance of microsystem technology in medical applications, particularly microelectronics and micromachining. This paper presents a new approach to biomedical monitoring of car driver physiological parameters. The system is based on our preliminary described theory and experiments.
Miniaturization of biomedical sensors has increased the importance of microsystem technology in medical applications, particularly microelectronics and micromachining. This paper presents a new approach to biomedical monitoring and analysis of selected human cognitive processes. The proposed technique measures human skin conductivity and heart rate using a dedicated measurement system which offers...
Planar thin-film microelectrodes have been developed based on conductive and transparent thin films of ZnO:Al which are applicable in biomedicine as well as in the thin film solar cells. Nano-structuralization of their interfaces (surfaces) was carried out by the ion-sputter etching and by the photo-assisted electrodeless chemical etching. Interdigital array of microelectrodes was verified as a very...
This paper presents a new approach of the non-invasive biomedical monitoring of selected psychosomatic processes. The proposed method measures human skin conductivities (psycho-galvanic reflex - PGR) using the interdigitated array (IDA) of microelectrodes as well as skin temperature and skin reflectance using optical spectrometer, which will allow continual monitoring and analysis of complicated physiological...
A study of the effect of technology parameters (sputtering power, substrate temperature and post-deposition annealing) on structural, electrical and optical properties of aluminium-doped zinc oxide (AZO) thin films was carried out. The optimal technology parameters of preparation were found to get necessary properties of AZO thin films for application in solar cells - the high figure of merit (F ges...
Zinc oxide (ZnO) and aluminium-doped zinc oxide (ZnO:Al) thin films were prepared by RF diode sputtering at varying deposition conditions. The effects of negative bias voltage and RF power on structural and optical properties were investigated. X-ray diffraction measurements (XRD) confirmed that both un-doped and Al-doped ZnO films are polycrystalline and have hexagonal wurtzite structure. The preferential...
The relations between the sputtering parameters and the crystalline microstructure of ZnO thin films are presented. The energetic bombardment of substrate by neutral atoms, ions and electrons during sputtering is characterized by total energy flux density which affects the film. This parameter can be estimated by RF power, substrate bias voltage and concentration of reactive gases. Substrate temperature...
This paper describes a new modification of non-invasive biomedical monitoring of psychosomatic processes. The proposed method is based on skin conductivity measurements by interdigitated array (IDA) of microelectrodes, which allows continual monitoring and analyzing of complicated physiological, pathophysiological and therapeutic processes. Main goal is to monitor psycho-galvanic reflex of the human...
Transparent conductive oxide thin films (indium tin oxide, zinc oxide and Al doped zinc oxide) were prepared by RF diode sputtering. Selected properties of these films (structure, resistivity and transparency) were investigated with the aim to use them in thin film solar cells
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