Daniel Moga

Assessment of Temperature Distribution in Intraperitoneal Chemohyperthermia

Advanced modeling techniques and multipoint temperature measurement devices are required in order to create a complex intraperitoneal chemohyperthermia physical model. This paper proposes two configurations appropriate for the implementation of a multipoint temperature measurement system. The design constrains were carefully defined considering the overall chemohyperthermia performance expectations and the need to provide thermal data for building a consistent 3D thermal map of the intra-peritoneal volume.

A Wireless System for Monitoring the Progressive Loading of Lower Limb in Post-Traumatic Rehabilitation

The paper presents a low cost system for wireless monitoring of the progressive loading of lower limb. This system contains a smart device able to measure the plantar pressure, to compare it with predefined levels and to signal the patient in order to avoid excessive loading of the limb in case of patients following post-traumatic rehabilitation.

A Maximum Power Point tracker for a photovoltaic system under changing luminosity conditions

In order to increase the output efficiency of a PV energy system, it has to be forced to operate near the maximum power point (MPP). A photovoltaic (PV) system, including Maximum Power Point Tracking (MPPT) controller that extracts the maximum possible output power from the solar panel is built. Simulation and experimental results show that the proposed system, making use of several MPPT control algorithms (Perturb and Observe (P&O), Incremental conductance (INC), Fuzzy Logic), provides good tracking performance.

A low cost architecture for remote control and monitoring of greenhouse fields

A low cost architecture is proposed for remote monitoring and control of a greenhouse field. The components needed for such a system are identified by examining the needs and trends of the environmental control systems as well as looking for the appropriate technologies that would offer a low cost. The key features of the proposed platform are remote operation, flexibility, ease of deployment, scalability and low cost. A sensing system, a communication system and a data processing system are components needed in order to monitor greenhouse fields placed in remote locations. Wired and wireless sensors are developed for collecting environmental data that characterize the operation of a greenhouse. A family of controllers and smart actuators is used next to the mentioned components in order to set up a control system whose behavior can be remotely programmed. A series of C++ applications running on Linux and Windows platforms were developed for experimenting and testing the complete telematic system.

Embedded platform for Web-based monitoring and control of a smart home

This paper presents the architecture of a low cost embedded platform for Web-based monitoring and control of a smart home. The platform consists of a distributed sensing and control network, devices for access control and a residential gateway with touch-screen display offering an easy to use interface to the user as well as providing remote, Web based access. The key issues related to the design of the proposed platform were addressed: the problem of security, the robustness of the distributed control network to faults and a low cost hardware implementation.

Remote Monitoring of Industrial Systems Health

Abstract A low cost platform is proposed for remote monitoring the health status of an industrial system. The key elements of this platform are: a measurement system, a communication system and a data processing system responsible for analyzing data and estimating the status of the equipments placed in remote locations. Wired and wireless sensors are developed for collecting vibration, acceleration, current and temperature values that characterize the operation of remote industrial equipment. A “plug and play„ software application is implemented for allowing remote computers to share this sensor data using OPC technology. Using Matlab as an OPC client, time-domain and frequency-domain signal processing techniques are used in order to determine the signatures associated with faults of the remote equipments.

Measured signal identification and temperature controller design for a HIPEC device

Peritoneal Carcinomatosis (PC) is an abdominal cancer for which cytoreductive surgery followed by hyperthermic intraperitoneal chemotherapy (HIPEC) proved to be a promising treatment. HIPEC requires the intraperitoneal spread of cytostatic solution at high temperatures (41-43°C) accomplished within 60-120 minutes, during surgical interventions. This paper presents the heating systems identification, by using a graphical fitting method on a temperature measured signal, for a HIPEC device intended to be developed. Also the design of two PID temperature controllers is presented, using the Strejc design method and the Ziegler-Nichols method. The two feedback control structures are compared via simulation, based on their step response signals and their overall performances.

Novel Control for a Buck Converter used in a DMPPT System

Abstract This paper is focused on the digital implementation of a voltage and a current loop for a buck converter used in distributed maximum power point systems (DMPPT). It presents the importance of an additional control to help the maximum power point tracking (MPPT) algorithm. The paper gives a detailed small signal analysis and describes the method for compensating the current and voltage loop, making the stability of the system independent of the operating point on the power voltage (P-V) characteristic. The paper also proposes an original Perturb and Observe (P&O) algorithm with variable step size to search a local maximum. The calculation of the step size is independent from the slope of the solar panels P-V characteristic, making the tracking performances independent of the PV module. Simulation and experimental results are finally provided to verify the performance of the system.

A Low Cost Approach to Large Smart Shelf Setups

Recent years showed a growing interest in the use of RFID technology in applications like distribution and storage of goods, supply chain and inventory. This paper analyses the current ...

Digital Temperature Control for an Hyperthermic Intraperitoneal Chemotherapy Equipment

This paper presents the design of a digital temperature controller for cytostatic solution used in hyperthermic intraperitoneal chemotherapy (HIPEC). Cytoreductive surgery and HIPEC technique, i.e. Regional chemotherapy using cytostatic drugs at high temperatures of 42-43°C, represents a treatment technique for cancer patients suffering of peritoneal carcinomatosis. The main challenge is to maintain the desired temperature of the cytostatic solution in the intraperitoneal cavity, thus, avoiding local abdominal injuries and systemic hyperthermia. In order to maintain the adequate temperature a digital controller is designed using the Dahlin algorithm, a model based design technique.