Ivan Simeonov

Algorithmic realization of system for short-term weather forecasting

In this paper is presented algorithmic realization of system for short-term weather forecasting, which makes acquisition, processing and visualization of information, related to the parameters temperature, atmospheric pressure, humidity, wind speed and direction. The proposed algorithm is defined from the juxtaposition of the collected statistical data with the currently measured data, on the chosen methods for weather forecasting and the determined correlation between the processed meteorological quantities. The choice of the methods for weather prediction is made according the needed input data and the resources for their realization.

Improvement and optimization of an embedded system for short-time weather forecasting

In this paper is presented the improvement of the hardware and the optimization of the algorithm of a system for short-time weather forecasting, developed by the authors. With a purpose of reading of more parameters there are proposed some solutions, related with giving of more accurate forecasts. The features of the system are extended and by means of Wireless communication and access to Internet for connection with other similar systems and/or Internet servers for meteorological information. The algorithm of work of the system is optimized as for base methods for prediction are accepted the Trends and Persistent methods, and the read of the surface effects are reduced to the influence of the wind, the humidity and the clouds cover. This leads to reducing of the requirements for processing resources of the used microcontroller and the volume of the processed statistical data. Under account are taken some modern methods for atmosphere sounding, and by them to increase the accuracy and to extend the range of the given forecasts.

System for non-contact ultrasonic study of mediums and materials intended for embedding into automated manufacturing systems

The main feature of ultrasound waves is their high frequency, allowing to be broadcast in the form of a narrow beam of rays and their distribution to be examined by the methods of geometrical optics. This allows ultrasound to be used for scientific and applied research. By the nature of distribution and absorption in gases, liquids and solids can be obtained valuable information about the structure and properties of substances. This article examines the use of hardware-software system designed for non-contact ultrasonic study of mediums and materials.

Ultrasonic device for non-contact studying of materials

In this paper is described the design and implementation of a device for non-contact ultrasonic studying of materials. Presented is a scheme solution of the device, into which are provided several key features for work with purpose for greater versatility. There are presented block diagrams of algorithms of the software necessary for some modes of work of the device with microcontroller PIC16F84A. These modes are related to the way for excitation of the ultrasonic transmitter and the synchronization of measurement. The principle of work of the system is described in details.

Formation of attribute spaces using wavelets in automatic classification of explosives

The non-contact automatic on-line classification of explosives is a multi-aspect task. It involves choosing the method of information gathering, planning and conduction of experiments, choosing a classifier, formation of training and control samples, synthesis and reduction of recognition attributes, etc. This paper presents the results of conducted experiments for non-contact ultrasonic information gathering, formation of attribute spaces by means of wavelet transformations and an automatic classification of explosives.

Monitoring of the change of the level of liquids and loose materials in reservoirs

An approach for receiving data and processing information about the level of filling tanks with liquids and loose materials is presented in the paper. This information may be used in different technological processes. The developed electronic scheme based on PIC16F84A micro controller is presented, too.