Bogdan Dziadak

Warsaw University of Technology · Faculty of Electrical Engineering

Wireless Sensor Networks (WSNs) have existed for many years and had assimilated many interesting innovations. Advances in electronics, radio transceivers, processes of IC manufacturing and development of algorithms for operation of such networks now enable creating energy-efficient devices that provide practical levels of performance and a sufficie...

The article presents a wireless measuring node operating in a system monitoring stress in steel structures. Stress sensor is a foil strain gauge, working in a half-bridge circuit. The presented node is based on the microcontroller Atmeg 8, and the data transmission modem used 433 MHz band. The use of 22-bit ADC allows for measurement of the stresse...

In this paper, some issues of building a reliable, distributed measurement system for monitoring of water quality in reservoir Lake Dobczyckie are presented. The system is based on a measurement station that has the shape of a floating buoy which is supposed to be at anchor on the reservoir. Wireless data transmission problems that were encountered...

In this paper is presented a research for environmental monitoring system with features such as alarming which is lowering delay of reaction of environmental protection emergency teams. Structure of the system based on the “Internet of Things” ideology and IEEE1451 networked smart transducer interface standard.

This paper presents a specific approach to the design of a mobile measurement station (MMS) that will operate in a harsh environment. This paper also presents a selection process for the hardware of the MMS. The work is based on a quality engineering method called the quality function deployment and on an operations research tool called the analyti...

This paper aims to present new trends in energy-harvesting solutions pertaining to wearable sensors and powering Body Area Network nodes. To begin, we will present the capability of human beings to generate energy. We then examine solutions for converting kinetic and thermal energy from the human body. As part of our review of kinetic converters, w...

This paper presents a human fall detection system. The system uses measurement data from accelerometer and gyroscope mounted on a hip belt of a monitored person. The data is wirelessly transmitted via WiFi and MQTT protocol to the server where it is analyzed and possibly the selected caregiver is notified about the fall. This message reaches the ca...

A closed-loop auto-tuner proportional integral derivative (PID) controller for tuning the DC-link voltage, voltage neutral controllers, and DQ axis current for a power factor corrector with Vienna rectifier is developed and discussed in this study. In traditional tuning of these control loops, it is needed to tune one loop at a time manually, which...

This article gives a broad overview of common air pollutants mainly occurring in metropolitan environments. Starting from volatile organic compounds (VOCs) and ending with particles matter concentration (PM). The main characteristics of air pollutants and areas of occurrence are discussed. Special attention was given to the acceptable ranges of occ...

The paper presents problems related to the processing of signals recorded with differential field probes E and H. The fundamental problem to which special attention has been paid is the result of the integration operation. Due to the presence of constant/slowly-varying components in the raw signal, there is a drift present in the outcome of integra...

Monitoring of railroad wagons is important for logistical processes, but above all for safety. One of the key parameters to be monitored is the temperature of the axle box and the bearings in the bogie. The problem with monitoring these parameters is the harsh environment and lack of power supply. In our research, we present a power supply system f...

This paper presents relations between real-world phenomena, sensors and measurement methods that without applied simplifications are generally nonlinear. The article is built upon real-world examples which directly affect quality of human life or straightforwardly refer to life itself. First, the health of a human being is investigated. Next, atten...

This article presents a system for monitoring the load caused by strong winds and snow on buildings’ roofs. An estimation of the total load on the structure is obtained by measuring the strain on the main roof girders. The system is based on a wireless sensor network structure. The measurement node uses metal strain gauges and strain sensors based...

This paper comprehensively presents key issues in design of an original optoelectronic measurement device built to assess amount of suspended particulate matter. The paper is introduced with a short explanation of concerns with a suspended particulate matter, what role it has in the air quality and how it affects health of human population. Then, p...

The aim of this publication is to present the use of OGC standards – SensorML and Observations & Measurements – to describe the sensor network and measurement process in the prototype of air quality monitoring network launched in Nowy Sacz in Poland. Standards are used to create structures of relational databases to achieve interoperability through...

Outline of construction of new, autonomous wireless sensor node is presented in this paper. Central point of the node is built aroundMSP430FR microcontroller that is characterised with extremely low energy consumption. Additional elements of the node are radio communicationmodule working in 2.4 GHz band, power supply section consisting of photovolt...

In this paper two types of prediction algorithm are presented. Presented procedures are related to the distributed measuremen t system for clear water monitoring. First one relates to the situation when water parameters are rapidly change during ecological disaster. Second type of prediction is connected to long-term fluctuation of water quality du...

In this paper is presented a research for multisensory data fusion implemented in environmental monitoring system. Described data fusion algorithm will be helpful in decision making process connected with protection a monitoring ecosystems (Using Data Fusion to Estimate Cyanobacteria Number in Dobczyckie Lake). Streszczenie. W tym artykule zaprezen...

Providing clean water with particular quality is one of the main issues in environmental protection. System for this objective must measure dozens of values and provide them reliably to staff of water treatment company. In complex situation such as leak or waste polluting water reservoir the system must help emergency response teams to solve the pr...

In this paper is presented a research for selection and test wireless communication interface which works in distributed measurement system dedicated to protection and monitoring ecosystems.

In this paper is presented a research for multisensory data fusion implemented in environmental monitoring system. Described data fusion algorithm will be helpful in decision making process connected with protection a monitoring ecosystems.

In the paper the solution of environmental monitoring system built as the wide area distributed measurement system is proposed. The conception of system architecture and information structure is presented. Some problems with system administration and data visualizations are discussed.

During the design and construction of a distributed measurement system, design engineers face many basic questions. How does one properly choose a structure and actual solutions for the key elements of the system? Which elements are important? How does one guarantee a suitable level of operating quality and reliability? A broad knowledge base and t...

The paper presents specific approach to the designing of the mobile measurement station using the quality engineering rules. Specific expectations of the market and engineers as well, for such equipment, need to find non standard approach to the design procedures. One of the most important part of this design is the central processing unit selectio...

This paper discusses the solution of the www petroleum derivative pollution monitoring system. The main aim of this paper is to present the authors' approach to the very current problem of the practical realization of the www, server based, measuring system. The idea of the system is based on collecting data from mobile GSM/GPRS accessed observatio...

We present the mobile observation point (MOP) and a system for monitoring hydrocarbons. This paper describes the technical problems in the development of the monitoring system and the MOP. We pay particular attention to procedures that predict measurement results and issue alerts about oil spills in water. This paper gives a comparison between the...

The laboratory work station for concentration of petroleum derivative substances measurement in water was presented in this article. The expected concentration should not be lower than 1 ppm. This work station uses the intelligent optical sensor supported by a PC. A few remarks concerned to the prediction procedures for measurement data was also sh...

The idea of mobile observation point (MOP) dedicated for a hydrocarbon monitoring system is presented. The main technical problems related to the monitoring system and MOP are described. Special attention was paid for a results of measurements prediction procedures. The main advantages and disadvantages of proposed solution are discussed.

Praca doktorska. PW Wydział Elektryczny, 2009.