Kostas Tarchanidis | ΤΕΙ ΑΜΘ (original) (raw)
Papers by Kostas Tarchanidis
This paper presents a circuit that has the ability to provide a sinusoidal current waveform. The ... more This paper presents a circuit that has the ability to provide a sinusoidal current waveform. The produced waveform is al-ternative, so it takes positive and negative values. This circuit comprises a microcontroller, a DAC with current output and a fast electronic switch. The sine wave samples are stored in the microcontroller’s data memory and are applied to the DAC’s digital 8-bit input. The complementary output currents are connected alternatively through the electronic switch to the ground. At pre-calculated timing the microcontroller changes the polarity of the switch, allowing the DAC’s output, as alternative current, to flow through the resistive sensor (load), ending through the switch to the ground. Another microcon-troller acting as data acquisition chip, at the positive peaks is sampling the voltage across the load. These measurements are transferred through the serial port to a PC, where the resistance is calculated and presented on screen.
This paper presents a circuit that has the ability to provide a sinusoidal current waveform. The ... more This paper presents a circuit that has the ability to provide a sinusoidal current waveform. The produced waveform is al-ternative, so it takes positive and negative values. This circuit comprises a microcontroller, a DAC with current output and a fast electronic switch. The sine wave samples are stored in the microcontroller’s data memory and are applied to the DAC’s digital 8-bit input. The complementary output currents are connected alternatively through the electronic switch to the ground. At pre-calculated timing the microcontroller changes the polarity of the switch, allowing the DAC’s output, as alternative current, to flow through the resistive sensor (load), ending through the switch to the ground. Another microcon-troller acting as data acquisition chip, at the positive peaks is sampling the voltage across the load. These measurements are transferred through the serial port to a PC, where the resistance is calculated and presented on screen.
A path generation method for robot-based welding systems is proposed. The method that is a modifi... more A path generation method for robot-based welding systems is proposed. The method that is a modification of the method “teach-ing by showing ” is supported by the recently developed pseudo stereovision system (PSVS). A path is generated by means of the target-object (TOB), PSVS, and the pseudo stereo visual servo control scheme proposed. A part of the new software applica-tion, called humanPT, permits the communication of a user with the robotic system. Here, PSVS, the robotic system, the TOB, the estimation of robot poses by means of the TOB, and the control and recording algorithm are described. Some new concepts concerning segmentation and point correspondence are applied as a complex image is processed. A method for calibrating the endpoint of TOB is also explained. Experimental results demonstrate the effectiveness of the proposed system.
A path generation method for robot-based welding systems is proposed. The method that is a modifi... more A path generation method for robot-based welding systems is proposed. The method that is a modification of the method “teach-ing by showing ” is supported by the recently developed pseudo stereovision system (PSVS). A path is generated by means of the target-object (TOB), PSVS, and the pseudo stereo visual servo control scheme proposed. A part of the new software applica-tion, called humanPT, permits the communication of a user with the robotic system. Here, PSVS, the robotic system, the TOB, the estimation of robot poses by means of the TOB, and the control and recording algorithm are described. Some new concepts concerning segmentation and point correspondence are applied as a complex image is processed. A method for calibrating the endpoint of TOB is also explained. Experimental results demonstrate the effectiveness of the proposed system.
Adaptive high-performance velocity evaluation based on a
Adaptive high-performance velocity evaluation based on a
Journal of Engineering Science and Technology Review, 2014
This project uses an IDAC-1 board to sample the joint angle position of the PUMA 76 1 robot and l... more This project uses an IDAC-1 board to sample the joint angle position of the PUMA 76 1 robot and log the results on a computer. The robot is at the task location and the logging computer is located in a different one. The task the robot is performing is based on a Pseudo Stereo Vision System (PSVS). Internet is the transport media. The protocol used in this project is UDP/IP. The actual angle is taken straight from the PUMA controller. High-resolution potentiometers are connected on each robot joint and are buffered and sampled as potential difference on an A/D converter integrated on the IDAC-1. The logging computer through the Internet acting as client asks for the angle set, the IDAC-1 responds as server with the 10-bit resolution sampling of the joint position. The whole task is logged in a file on the logging computer. This application can give the ability to the Internet user to monitor and log the robot tasks anywhere in the Word Wide Web (www).
Journal of Engineering Science and Technology Review, 2014
This project uses an IDAC-1 board to sample the joint angle position of the PUMA 76 1 robot and l... more This project uses an IDAC-1 board to sample the joint angle position of the PUMA 76 1 robot and log the results on a computer. The robot is at the task location and the logging computer is located in a different one. The task the robot is performing is based on a Pseudo Stereo Vision System (PSVS). Internet is the transport media. The protocol used in this project is UDP/IP. The actual angle is taken straight from the PUMA controller. High-resolution potentiometers are connected on each robot joint and are buffered and sampled as potential difference on an A/D converter integrated on the IDAC-1. The logging computer through the Internet acting as client asks for the angle set, the IDAC-1 responds as server with the 10-bit resolution sampling of the joint position. The whole task is logged in a file on the logging computer. This application can give the ability to the Internet user to monitor and log the robot tasks anywhere in the Word Wide Web (www).
Journal of Engineering Science and Technology Review, 2011
This paper presents a circuit that has the ability to provide a sinusoidal current waveform. The ... more This paper presents a circuit that has the ability to provide a sinusoidal current waveform. The produced waveform is alternative, so it takes positive and negative values. This circuit comprises a microcontroller, a DAC with current output and a fast electronic switch. The sine wave samples are stored in the microcontroller's data memory and are applied to the DAC's digital 8-bit input. The complementary output currents are connected alternatively through the electronic switch to the ground. At pre-calculated timing the microcontroller changes the polarity of the switch, allowing the DAC's output, as alternative current, to flow through the resistive sensor (load), ending through the switch to the ground. Another microcontroller acting as data acquisition chip, at the positive peaks is sampling the voltage across the load. These measurements are transferred through the serial port to a PC, where the resistance is calculated and presented on screen.
Journal of Engineering Science and Technology Review, 2011
This paper presents a circuit that has the ability to provide a sinusoidal current waveform. The ... more This paper presents a circuit that has the ability to provide a sinusoidal current waveform. The produced waveform is alternative, so it takes positive and negative values. This circuit comprises a microcontroller, a DAC with current output and a fast electronic switch. The sine wave samples are stored in the microcontroller's data memory and are applied to the DAC's digital 8-bit input. The complementary output currents are connected alternatively through the electronic switch to the ground. At pre-calculated timing the microcontroller changes the polarity of the switch, allowing the DAC's output, as alternative current, to flow through the resistive sensor (load), ending through the switch to the ground. Another microcontroller acting as data acquisition chip, at the positive peaks is sampling the voltage across the load. These measurements are transferred through the serial port to a PC, where the resistance is calculated and presented on screen.
Journal of Engineering Science and Technology Review, 2013
This paper presents an application of the well known SPWM technique on a voltage stabilizer, usin... more This paper presents an application of the well known SPWM technique on a voltage stabilizer, using a microcontroller. The stabilizer is AC/DC/AC type. So, the system rectifies the input AC voltage to a suitable DC level and the intelligent control of an embedded microcontroller regulates the pulse width of the output voltage in order to produce through a filter a perfect sinusoidal AC voltage. The control program on the microcontroller has the ability to change the FET transistor firing in order to compensate any input voltage variation. The applied software using the microcontroller's interrupts managed to achieve concurrency on the running program.
Journal of Engineering Science and Technology Review, 2013
This paper presents an application of the well known SPWM technique on a voltage stabilizer, usin... more This paper presents an application of the well known SPWM technique on a voltage stabilizer, using a microcontroller. The stabilizer is AC/DC/AC type. So, the system rectifies the input AC voltage to a suitable DC level and the intelligent control of an embedded microcontroller regulates the pulse width of the output voltage in order to produce through a filter a perfect sinusoidal AC voltage. The control program on the microcontroller has the ability to change the FET transistor firing in order to compensate any input voltage variation. The applied software using the microcontroller's interrupts managed to achieve concurrency on the running program.
Studies in Surface Science and Catalysis, 2002
A series of controlled pore glasses (CPG's) having nominal pore diameters from 120 to 350... more A series of controlled pore glasses (CPG's) having nominal pore diameters from 120 to 350 A and the related Vycor porous glass were examined by Small-Angle X-ray Scattering (SAXS). The spectra of these glasses show a rather broad peak at low scattering angles and, after that, the scattered intensity decays by following a non-integer power law. The location of the
Studies in Surface Science and Catalysis, 2002
A series of controlled pore glasses (CPG's) having nominal pore diameters from 120 to 350... more A series of controlled pore glasses (CPG's) having nominal pore diameters from 120 to 350 A and the related Vycor porous glass were examined by Small-Angle X-ray Scattering (SAXS). The spectra of these glasses show a rather broad peak at low scattering angles and, after that, the scattered intensity decays by following a non-integer power law. The location of the
Proceedings of the 20th IEEE Instrumentation Technology Conference (Cat. No.03CH37412), 2003
ABSTRACT This project uses an IDAC-1 board to sample the water level of a plexiglas column and to... more ABSTRACT This project uses an IDAC-1 board to sample the water level of a plexiglas column and to control its level. The level is measured by a pressure sensor and the control is performed by ON-OFF valves. Data are passed to a main computer and Internet is the transport media. The protocol used in this project is UDP/IP. The water pressure is sampled as potential difference on an A/D converter integrated on the IDAC-1. The controlling computer through the Internet acting as client asks for the pressure (water level) and IDAC-1 responds as server with the 10-bit resolution. To control the water level the IDAC-1 digital outputs through the two relays operate on the inlet and outlet valves. So, the water level can be controlled from anywhere in the World Wide Web (www).
Proceedings of the 20th IEEE Instrumentation Technology Conference (Cat. No.03CH37412), 2003
ABSTRACT This project uses an IDAC-1 board to sample the water level of a plexiglas column and to... more ABSTRACT This project uses an IDAC-1 board to sample the water level of a plexiglas column and to control its level. The level is measured by a pressure sensor and the control is performed by ON-OFF valves. Data are passed to a main computer and Internet is the transport media. The protocol used in this project is UDP/IP. The water pressure is sampled as potential difference on an A/D converter integrated on the IDAC-1. The controlling computer through the Internet acting as client asks for the pressure (water level) and IDAC-1 responds as server with the 10-bit resolution. To control the water level the IDAC-1 digital outputs through the two relays operate on the inlet and outlet valves. So, the water level can be controlled from anywhere in the World Wide Web (www).
This paper describes the implementation of a hybrid neural network / Newton-Raphson algorithm to ... more This paper describes the implementation of a hybrid neural network / Newton-Raphson algorithm to produce the inverse kinematics solutions. Such an algorithm is required in order to administer a variety of robot tasks on different robot platforms. The system is based on the combination of neural networks and the parallel processing capabilities of the Inmos transputer. The exploitation of both architectures results in more efficient and fast numerical solutions. Positioning accuracy experimental results from two robots are presented. Keywords: Neural networks, Newton-Raphson, flexible control, inverse kinematics, parallel processing, transputers INTRODUCTION
This paper describes the implementation of a hybrid neural network / Newton-Raphson algorithm to ... more This paper describes the implementation of a hybrid neural network / Newton-Raphson algorithm to produce the inverse kinematics solutions. Such an algorithm is required in order to administer a variety of robot tasks on different robot platforms. The system is based on the combination of neural networks and the parallel processing capabilities of the Inmos transputer. The exploitation of both architectures results in more efficient and fast numerical solutions. Positioning accuracy experimental results from two robots are presented. Keywords: Neural networks, Newton-Raphson, flexible control, inverse kinematics, parallel processing, transputers INTRODUCTION
IMTC 2001. Proceedings of the 18th IEEE Instrumentation and Measurement Technology Conference. Rediscovering Measurement in the Age of Informatics (Cat. No.01CH 37188), 2001
This paper presents a technique to design a digital optical-fiber photoplethysmograph. This nonin... more This paper presents a technique to design a digital optical-fiber photoplethysmograph. This noninvasive method is based on the measurement of the intensity of an infrared-light beam, which penetrates the index finger. Digital techniques are used to produce the transmitted signal and to demodulate the received signal. Optical fibers are used to transfer the light to and from the sampling point.
2006 IEEE Symposium on Virtual Environments, Human-Computer Interfaces and Measurement Systems, 2006
ABSTRACT Basic measurement concepts of a new apparatus for the experimental study of physics phen... more ABSTRACT Basic measurement concepts of a new apparatus for the experimental study of physics phenomena based on laser modules and detectors are presented in this paper. Construction details of the proposed apparatus are also described. Measurement time base is 100 musec (depending on the microprocessor used) and in each cycle, data coming from eight photo-detectors are stored. When an experiment is finished or corrupted by a user, data are transferred in a personal computer and with the aid of a software application (depending on the experiments) final values of variables are calculated. The results as well as graphical representations of them are displayed on the screen. The proposed apparatus can be used to study straight or circular movements with controlled friction or without friction, collisions, gravitation phenomena, to measure acceleration of gravity (g), reflection and refraction phenomena as well as to permit in a pupil or student to be experimented with digital gates
This paper presents a circuit that has the ability to provide a sinusoidal current waveform. The ... more This paper presents a circuit that has the ability to provide a sinusoidal current waveform. The produced waveform is al-ternative, so it takes positive and negative values. This circuit comprises a microcontroller, a DAC with current output and a fast electronic switch. The sine wave samples are stored in the microcontroller’s data memory and are applied to the DAC’s digital 8-bit input. The complementary output currents are connected alternatively through the electronic switch to the ground. At pre-calculated timing the microcontroller changes the polarity of the switch, allowing the DAC’s output, as alternative current, to flow through the resistive sensor (load), ending through the switch to the ground. Another microcon-troller acting as data acquisition chip, at the positive peaks is sampling the voltage across the load. These measurements are transferred through the serial port to a PC, where the resistance is calculated and presented on screen.
This paper presents a circuit that has the ability to provide a sinusoidal current waveform. The ... more This paper presents a circuit that has the ability to provide a sinusoidal current waveform. The produced waveform is al-ternative, so it takes positive and negative values. This circuit comprises a microcontroller, a DAC with current output and a fast electronic switch. The sine wave samples are stored in the microcontroller’s data memory and are applied to the DAC’s digital 8-bit input. The complementary output currents are connected alternatively through the electronic switch to the ground. At pre-calculated timing the microcontroller changes the polarity of the switch, allowing the DAC’s output, as alternative current, to flow through the resistive sensor (load), ending through the switch to the ground. Another microcon-troller acting as data acquisition chip, at the positive peaks is sampling the voltage across the load. These measurements are transferred through the serial port to a PC, where the resistance is calculated and presented on screen.
A path generation method for robot-based welding systems is proposed. The method that is a modifi... more A path generation method for robot-based welding systems is proposed. The method that is a modification of the method “teach-ing by showing ” is supported by the recently developed pseudo stereovision system (PSVS). A path is generated by means of the target-object (TOB), PSVS, and the pseudo stereo visual servo control scheme proposed. A part of the new software applica-tion, called humanPT, permits the communication of a user with the robotic system. Here, PSVS, the robotic system, the TOB, the estimation of robot poses by means of the TOB, and the control and recording algorithm are described. Some new concepts concerning segmentation and point correspondence are applied as a complex image is processed. A method for calibrating the endpoint of TOB is also explained. Experimental results demonstrate the effectiveness of the proposed system.
A path generation method for robot-based welding systems is proposed. The method that is a modifi... more A path generation method for robot-based welding systems is proposed. The method that is a modification of the method “teach-ing by showing ” is supported by the recently developed pseudo stereovision system (PSVS). A path is generated by means of the target-object (TOB), PSVS, and the pseudo stereo visual servo control scheme proposed. A part of the new software applica-tion, called humanPT, permits the communication of a user with the robotic system. Here, PSVS, the robotic system, the TOB, the estimation of robot poses by means of the TOB, and the control and recording algorithm are described. Some new concepts concerning segmentation and point correspondence are applied as a complex image is processed. A method for calibrating the endpoint of TOB is also explained. Experimental results demonstrate the effectiveness of the proposed system.
Adaptive high-performance velocity evaluation based on a
Adaptive high-performance velocity evaluation based on a
Journal of Engineering Science and Technology Review, 2014
This project uses an IDAC-1 board to sample the joint angle position of the PUMA 76 1 robot and l... more This project uses an IDAC-1 board to sample the joint angle position of the PUMA 76 1 robot and log the results on a computer. The robot is at the task location and the logging computer is located in a different one. The task the robot is performing is based on a Pseudo Stereo Vision System (PSVS). Internet is the transport media. The protocol used in this project is UDP/IP. The actual angle is taken straight from the PUMA controller. High-resolution potentiometers are connected on each robot joint and are buffered and sampled as potential difference on an A/D converter integrated on the IDAC-1. The logging computer through the Internet acting as client asks for the angle set, the IDAC-1 responds as server with the 10-bit resolution sampling of the joint position. The whole task is logged in a file on the logging computer. This application can give the ability to the Internet user to monitor and log the robot tasks anywhere in the Word Wide Web (www).
Journal of Engineering Science and Technology Review, 2014
This project uses an IDAC-1 board to sample the joint angle position of the PUMA 76 1 robot and l... more This project uses an IDAC-1 board to sample the joint angle position of the PUMA 76 1 robot and log the results on a computer. The robot is at the task location and the logging computer is located in a different one. The task the robot is performing is based on a Pseudo Stereo Vision System (PSVS). Internet is the transport media. The protocol used in this project is UDP/IP. The actual angle is taken straight from the PUMA controller. High-resolution potentiometers are connected on each robot joint and are buffered and sampled as potential difference on an A/D converter integrated on the IDAC-1. The logging computer through the Internet acting as client asks for the angle set, the IDAC-1 responds as server with the 10-bit resolution sampling of the joint position. The whole task is logged in a file on the logging computer. This application can give the ability to the Internet user to monitor and log the robot tasks anywhere in the Word Wide Web (www).
Journal of Engineering Science and Technology Review, 2011
This paper presents a circuit that has the ability to provide a sinusoidal current waveform. The ... more This paper presents a circuit that has the ability to provide a sinusoidal current waveform. The produced waveform is alternative, so it takes positive and negative values. This circuit comprises a microcontroller, a DAC with current output and a fast electronic switch. The sine wave samples are stored in the microcontroller's data memory and are applied to the DAC's digital 8-bit input. The complementary output currents are connected alternatively through the electronic switch to the ground. At pre-calculated timing the microcontroller changes the polarity of the switch, allowing the DAC's output, as alternative current, to flow through the resistive sensor (load), ending through the switch to the ground. Another microcontroller acting as data acquisition chip, at the positive peaks is sampling the voltage across the load. These measurements are transferred through the serial port to a PC, where the resistance is calculated and presented on screen.
Journal of Engineering Science and Technology Review, 2011
This paper presents a circuit that has the ability to provide a sinusoidal current waveform. The ... more This paper presents a circuit that has the ability to provide a sinusoidal current waveform. The produced waveform is alternative, so it takes positive and negative values. This circuit comprises a microcontroller, a DAC with current output and a fast electronic switch. The sine wave samples are stored in the microcontroller's data memory and are applied to the DAC's digital 8-bit input. The complementary output currents are connected alternatively through the electronic switch to the ground. At pre-calculated timing the microcontroller changes the polarity of the switch, allowing the DAC's output, as alternative current, to flow through the resistive sensor (load), ending through the switch to the ground. Another microcontroller acting as data acquisition chip, at the positive peaks is sampling the voltage across the load. These measurements are transferred through the serial port to a PC, where the resistance is calculated and presented on screen.
Journal of Engineering Science and Technology Review, 2013
This paper presents an application of the well known SPWM technique on a voltage stabilizer, usin... more This paper presents an application of the well known SPWM technique on a voltage stabilizer, using a microcontroller. The stabilizer is AC/DC/AC type. So, the system rectifies the input AC voltage to a suitable DC level and the intelligent control of an embedded microcontroller regulates the pulse width of the output voltage in order to produce through a filter a perfect sinusoidal AC voltage. The control program on the microcontroller has the ability to change the FET transistor firing in order to compensate any input voltage variation. The applied software using the microcontroller's interrupts managed to achieve concurrency on the running program.
Journal of Engineering Science and Technology Review, 2013
This paper presents an application of the well known SPWM technique on a voltage stabilizer, usin... more This paper presents an application of the well known SPWM technique on a voltage stabilizer, using a microcontroller. The stabilizer is AC/DC/AC type. So, the system rectifies the input AC voltage to a suitable DC level and the intelligent control of an embedded microcontroller regulates the pulse width of the output voltage in order to produce through a filter a perfect sinusoidal AC voltage. The control program on the microcontroller has the ability to change the FET transistor firing in order to compensate any input voltage variation. The applied software using the microcontroller's interrupts managed to achieve concurrency on the running program.
Studies in Surface Science and Catalysis, 2002
A series of controlled pore glasses (CPG's) having nominal pore diameters from 120 to 350... more A series of controlled pore glasses (CPG's) having nominal pore diameters from 120 to 350 A and the related Vycor porous glass were examined by Small-Angle X-ray Scattering (SAXS). The spectra of these glasses show a rather broad peak at low scattering angles and, after that, the scattered intensity decays by following a non-integer power law. The location of the
Studies in Surface Science and Catalysis, 2002
A series of controlled pore glasses (CPG's) having nominal pore diameters from 120 to 350... more A series of controlled pore glasses (CPG's) having nominal pore diameters from 120 to 350 A and the related Vycor porous glass were examined by Small-Angle X-ray Scattering (SAXS). The spectra of these glasses show a rather broad peak at low scattering angles and, after that, the scattered intensity decays by following a non-integer power law. The location of the
Proceedings of the 20th IEEE Instrumentation Technology Conference (Cat. No.03CH37412), 2003
ABSTRACT This project uses an IDAC-1 board to sample the water level of a plexiglas column and to... more ABSTRACT This project uses an IDAC-1 board to sample the water level of a plexiglas column and to control its level. The level is measured by a pressure sensor and the control is performed by ON-OFF valves. Data are passed to a main computer and Internet is the transport media. The protocol used in this project is UDP/IP. The water pressure is sampled as potential difference on an A/D converter integrated on the IDAC-1. The controlling computer through the Internet acting as client asks for the pressure (water level) and IDAC-1 responds as server with the 10-bit resolution. To control the water level the IDAC-1 digital outputs through the two relays operate on the inlet and outlet valves. So, the water level can be controlled from anywhere in the World Wide Web (www).
Proceedings of the 20th IEEE Instrumentation Technology Conference (Cat. No.03CH37412), 2003
ABSTRACT This project uses an IDAC-1 board to sample the water level of a plexiglas column and to... more ABSTRACT This project uses an IDAC-1 board to sample the water level of a plexiglas column and to control its level. The level is measured by a pressure sensor and the control is performed by ON-OFF valves. Data are passed to a main computer and Internet is the transport media. The protocol used in this project is UDP/IP. The water pressure is sampled as potential difference on an A/D converter integrated on the IDAC-1. The controlling computer through the Internet acting as client asks for the pressure (water level) and IDAC-1 responds as server with the 10-bit resolution. To control the water level the IDAC-1 digital outputs through the two relays operate on the inlet and outlet valves. So, the water level can be controlled from anywhere in the World Wide Web (www).
This paper describes the implementation of a hybrid neural network / Newton-Raphson algorithm to ... more This paper describes the implementation of a hybrid neural network / Newton-Raphson algorithm to produce the inverse kinematics solutions. Such an algorithm is required in order to administer a variety of robot tasks on different robot platforms. The system is based on the combination of neural networks and the parallel processing capabilities of the Inmos transputer. The exploitation of both architectures results in more efficient and fast numerical solutions. Positioning accuracy experimental results from two robots are presented. Keywords: Neural networks, Newton-Raphson, flexible control, inverse kinematics, parallel processing, transputers INTRODUCTION
This paper describes the implementation of a hybrid neural network / Newton-Raphson algorithm to ... more This paper describes the implementation of a hybrid neural network / Newton-Raphson algorithm to produce the inverse kinematics solutions. Such an algorithm is required in order to administer a variety of robot tasks on different robot platforms. The system is based on the combination of neural networks and the parallel processing capabilities of the Inmos transputer. The exploitation of both architectures results in more efficient and fast numerical solutions. Positioning accuracy experimental results from two robots are presented. Keywords: Neural networks, Newton-Raphson, flexible control, inverse kinematics, parallel processing, transputers INTRODUCTION
IMTC 2001. Proceedings of the 18th IEEE Instrumentation and Measurement Technology Conference. Rediscovering Measurement in the Age of Informatics (Cat. No.01CH 37188), 2001
This paper presents a technique to design a digital optical-fiber photoplethysmograph. This nonin... more This paper presents a technique to design a digital optical-fiber photoplethysmograph. This noninvasive method is based on the measurement of the intensity of an infrared-light beam, which penetrates the index finger. Digital techniques are used to produce the transmitted signal and to demodulate the received signal. Optical fibers are used to transfer the light to and from the sampling point.
2006 IEEE Symposium on Virtual Environments, Human-Computer Interfaces and Measurement Systems, 2006
ABSTRACT Basic measurement concepts of a new apparatus for the experimental study of physics phen... more ABSTRACT Basic measurement concepts of a new apparatus for the experimental study of physics phenomena based on laser modules and detectors are presented in this paper. Construction details of the proposed apparatus are also described. Measurement time base is 100 musec (depending on the microprocessor used) and in each cycle, data coming from eight photo-detectors are stored. When an experiment is finished or corrupted by a user, data are transferred in a personal computer and with the aid of a software application (depending on the experiments) final values of variables are calculated. The results as well as graphical representations of them are displayed on the screen. The proposed apparatus can be used to study straight or circular movements with controlled friction or without friction, collisions, gravitation phenomena, to measure acceleration of gravity (g), reflection and refraction phenomena as well as to permit in a pupil or student to be experimented with digital gates