2018 17th RoEduNet Conference: Networking in Education and Research (RoEduNet), 2018
Temperature measurement still presents specific challenges in embedded systems. Since off the she... more Temperature measurement still presents specific challenges in embedded systems. Since off the shelf microcontrollers also include simple analog inputs, they are widely used in embedded IIoT (Industrial Internet of Things) devices. The analog inputs of such controllers typically have a low resolution, not appropriate for measuring the output of special purpose sensors (e.g., Negative Temperature Coefficient-(NTC)). This paper analyses and compares methods for temperature measurement based on signal conditioning and linearization circuits for thermocouple, NTC, RTD (Resistance Temperature Detector) and semiconductor sensors, offering a set of experimental results obtained without initial calibration or any other software compensation of the initial errors.
This paper proposes an efficient algorithm for complex criteria applied to K-LUT based FPGA mappe... more This paper proposes an efficient algorithm for complex criteria applied to K-LUT based FPGA mapped circuits. This algorithm is developed considering an important design factor – dynamic power consumption -in addition to other design factors that are traditionally considered. To increase performance, it was used a flexible mapping tool based on exhaustive generation of all K-bounded sub-circuits rooted in each node of the circuit. To achieve information about dissipated functional power was implement efficient simulator. Area is of paramount importance in FPGA mapping circuits. Lastly to lower power consumption, we devised several effective techniques designed for reducing area Keywords: power-aware mapping, optimal area, K-LUT based FPGA, logic activity simulator, functional power.
Wireless sensors and actuators networks (WSAN) have started to be massively deployed for a large ... more Wireless sensors and actuators networks (WSAN) have started to be massively deployed for a large number of diverse applications, such as military, environmental, medical, factory automation, home appliances, interactive museums and many others. These networks are usually integrated into extremely complex cyber physical systems. The nodes of these networks are either fixed, or mobile. All WSAN share some common characteristics, but they also address particular challenges, specific to each application area. A need that is common to many such networks, but has also particular requirements and constraints due to their specific application area is determining the position of certain nodes in the network. The paper reviews the most popular approaches in localization, as well as the specific requirements and constraints in medical and robotics applications and discusses the best approaches for localization in such applications.
In this paper we studied a device based on array of six different sensors with surface acoustic w... more In this paper we studied a device based on array of six different sensors with surface acoustic wave for detections and recognition of three chemical warfare agents (chloropicrin, soman and lewisite). The sensors are “delay line” type with a center frequency of 69.4 MHz. It presents an original algorithm to identify the nature and concentration of gas from a finite range of possible gases. Numerical program developed to implement this algorithm, provides to operators all the particulars of gas and an indicator of credibility of the results provided as a measure of the degree of disturbance of the signals received from sensors.
ABSTRACT Physical faults include bridging fault, break (open) fault, transistor stuck-on and tran... more ABSTRACT Physical faults include bridging fault, break (open) fault, transistor stuck-on and transistor stuck-off Compared to traditional gate-level stuck-at faults, physical faults more closely represent realistic faults appearing at the gate level and switch level. Analytical modeling for such faults, used for design and testability, is still a new and emerging area. Undetectable bridging faults belong to hard to detect faults class and can invalidate several sets of tests designed for classical stuck-at faults. This work introduces an analytical characterization for bridging faults using difference Boolean approach.
ABSTRACT Partitioning is a central problem in VLSI design automation, addressing circuit’s manufa... more ABSTRACT Partitioning is a central problem in VLSI design automation, addressing circuit’s manufacturability. Circuit partitioning has multiple applications in VLSI design. One of the most common is that of dividing combinational circuits (usually large ones) that will not fit on a single package among a number of packages. Partitioning is of practical importance for k-LUT based FPGA circuit implementation. In this work is presented new multilevel and multi-resource partitioning algorithm targeting large combinational circuits in order to efficiently use existing FPGAs circuits.
2016 15th RoEduNet Conference: Networking in Education and Research, 2016
As the Industrial Internet of Things evolves, ever more data acquisition devices are integrated i... more As the Industrial Internet of Things evolves, ever more data acquisition devices are integrated inside factories, silos, agriculture facilities, industrial facilities, cars and many other applications. One of the most common measured parameter, that also creates the most problems in specific applications, is temperature. There is an abundance of analog temperature transducers, available for engineers and researchers, with varying precision, temperature range, linearity, power consumption, and cost. Besides invasive temperature sensors and transducers, in recent years microwave based temperature measurement methods have been developed. The current paper presents one method of reading thermocouples without the need of a high resolution ADC or digital calculation of complex polynomial functions. The article is focused on the linearization circuit, measurement results, errors and presents a short application using NI WSN nodes as part of IIoT.
In this paper is presented a new approach for decreasing the functional power consumption in LUT ... more In this paper is presented a new approach for decreasing the functional power consumption in LUT based FPGA implemented circuits. The attempt is based on reducing logic activity among LUTs. In order to achieve this target it was used the simulation-based approach that estimates, using a Monte Carlo experiment, the dynamic switching activity of each line in the circuit. Traversing
In this paper we studied a device based on array of six different sensors with surface acoustic w... more In this paper we studied a device based on array of six different sensors with surface acoustic wave for detections and recognition of three chemical warfare agents (Chloropicrin, Soman and Lewisite). The sensors are “delay line” type with a center frequency of 69.4 MHz. It presents an original algorithm to identify the nature and concentration of gas from a finite range of possible gases. Numerical program developed to implement this algorithm, provides to operators all the particulars of gas and an indicator of credibility of the results provided as a measure of the degree of disturbance of the signals received from sensors.
In this paper is presented a new approach for decreasing the spurious power consumption in K-LUT ... more In this paper is presented a new approach for decreasing the spurious power consumption in K-LUT based FPGA implemented circuits. The approach is based on selective collapsing nodes in a direct acyclic graph (DAG) representing combinational or synchronous sequential circuits. It was used the simulation-based approach that estimates, using Monte Carlo experiment, the spurious switching activity of each net in the circuit. Traversing circuits in topological order, step by step best K-feasible cone are computed at the output of each node. Preserving the best depth of the circuits the mapping stage is done searching to minimize spurious switching power.
2018 17th RoEduNet Conference: Networking in Education and Research (RoEduNet), 2018
Temperature measurement still presents specific challenges in embedded systems. Since off the she... more Temperature measurement still presents specific challenges in embedded systems. Since off the shelf microcontrollers also include simple analog inputs, they are widely used in embedded IIoT (Industrial Internet of Things) devices. The analog inputs of such controllers typically have a low resolution, not appropriate for measuring the output of special purpose sensors (e.g., Negative Temperature Coefficient-(NTC)). This paper analyses and compares methods for temperature measurement based on signal conditioning and linearization circuits for thermocouple, NTC, RTD (Resistance Temperature Detector) and semiconductor sensors, offering a set of experimental results obtained without initial calibration or any other software compensation of the initial errors.
This paper proposes an efficient algorithm for complex criteria applied to K-LUT based FPGA mappe... more This paper proposes an efficient algorithm for complex criteria applied to K-LUT based FPGA mapped circuits. This algorithm is developed considering an important design factor – dynamic power consumption -in addition to other design factors that are traditionally considered. To increase performance, it was used a flexible mapping tool based on exhaustive generation of all K-bounded sub-circuits rooted in each node of the circuit. To achieve information about dissipated functional power was implement efficient simulator. Area is of paramount importance in FPGA mapping circuits. Lastly to lower power consumption, we devised several effective techniques designed for reducing area Keywords: power-aware mapping, optimal area, K-LUT based FPGA, logic activity simulator, functional power.
Wireless sensors and actuators networks (WSAN) have started to be massively deployed for a large ... more Wireless sensors and actuators networks (WSAN) have started to be massively deployed for a large number of diverse applications, such as military, environmental, medical, factory automation, home appliances, interactive museums and many others. These networks are usually integrated into extremely complex cyber physical systems. The nodes of these networks are either fixed, or mobile. All WSAN share some common characteristics, but they also address particular challenges, specific to each application area. A need that is common to many such networks, but has also particular requirements and constraints due to their specific application area is determining the position of certain nodes in the network. The paper reviews the most popular approaches in localization, as well as the specific requirements and constraints in medical and robotics applications and discusses the best approaches for localization in such applications.
In this paper we studied a device based on array of six different sensors with surface acoustic w... more In this paper we studied a device based on array of six different sensors with surface acoustic wave for detections and recognition of three chemical warfare agents (chloropicrin, soman and lewisite). The sensors are “delay line” type with a center frequency of 69.4 MHz. It presents an original algorithm to identify the nature and concentration of gas from a finite range of possible gases. Numerical program developed to implement this algorithm, provides to operators all the particulars of gas and an indicator of credibility of the results provided as a measure of the degree of disturbance of the signals received from sensors.
ABSTRACT Physical faults include bridging fault, break (open) fault, transistor stuck-on and tran... more ABSTRACT Physical faults include bridging fault, break (open) fault, transistor stuck-on and transistor stuck-off Compared to traditional gate-level stuck-at faults, physical faults more closely represent realistic faults appearing at the gate level and switch level. Analytical modeling for such faults, used for design and testability, is still a new and emerging area. Undetectable bridging faults belong to hard to detect faults class and can invalidate several sets of tests designed for classical stuck-at faults. This work introduces an analytical characterization for bridging faults using difference Boolean approach.
ABSTRACT Partitioning is a central problem in VLSI design automation, addressing circuit’s manufa... more ABSTRACT Partitioning is a central problem in VLSI design automation, addressing circuit’s manufacturability. Circuit partitioning has multiple applications in VLSI design. One of the most common is that of dividing combinational circuits (usually large ones) that will not fit on a single package among a number of packages. Partitioning is of practical importance for k-LUT based FPGA circuit implementation. In this work is presented new multilevel and multi-resource partitioning algorithm targeting large combinational circuits in order to efficiently use existing FPGAs circuits.
2016 15th RoEduNet Conference: Networking in Education and Research, 2016
As the Industrial Internet of Things evolves, ever more data acquisition devices are integrated i... more As the Industrial Internet of Things evolves, ever more data acquisition devices are integrated inside factories, silos, agriculture facilities, industrial facilities, cars and many other applications. One of the most common measured parameter, that also creates the most problems in specific applications, is temperature. There is an abundance of analog temperature transducers, available for engineers and researchers, with varying precision, temperature range, linearity, power consumption, and cost. Besides invasive temperature sensors and transducers, in recent years microwave based temperature measurement methods have been developed. The current paper presents one method of reading thermocouples without the need of a high resolution ADC or digital calculation of complex polynomial functions. The article is focused on the linearization circuit, measurement results, errors and presents a short application using NI WSN nodes as part of IIoT.
In this paper is presented a new approach for decreasing the functional power consumption in LUT ... more In this paper is presented a new approach for decreasing the functional power consumption in LUT based FPGA implemented circuits. The attempt is based on reducing logic activity among LUTs. In order to achieve this target it was used the simulation-based approach that estimates, using a Monte Carlo experiment, the dynamic switching activity of each line in the circuit. Traversing
In this paper we studied a device based on array of six different sensors with surface acoustic w... more In this paper we studied a device based on array of six different sensors with surface acoustic wave for detections and recognition of three chemical warfare agents (Chloropicrin, Soman and Lewisite). The sensors are “delay line” type with a center frequency of 69.4 MHz. It presents an original algorithm to identify the nature and concentration of gas from a finite range of possible gases. Numerical program developed to implement this algorithm, provides to operators all the particulars of gas and an indicator of credibility of the results provided as a measure of the degree of disturbance of the signals received from sensors.
In this paper is presented a new approach for decreasing the spurious power consumption in K-LUT ... more In this paper is presented a new approach for decreasing the spurious power consumption in K-LUT based FPGA implemented circuits. The approach is based on selective collapsing nodes in a direct acyclic graph (DAG) representing combinational or synchronous sequential circuits. It was used the simulation-based approach that estimates, using Monte Carlo experiment, the spurious switching activity of each net in the circuit. Traversing circuits in topological order, step by step best K-feasible cone are computed at the output of each node. Preserving the best depth of the circuits the mapping stage is done searching to minimize spurious switching power.
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