scholarly journals The Design of Data Collector to Calculate the Efficiency of DC to AC Inverter Based on ATmega328 and Micro SD as Storage Media

2020 ◽  
Vol 2 (2) ◽  
pp. 129-138
Author(s):  
Kurnia Brahmana
Keyword(s):  
Voltage Sensor ◽  
Current Sensor ◽  
Storage Medium ◽  
Data Logger ◽  
Reading Error ◽  
Data Collector ◽  
Storage Media ◽  
Measurement Results ◽  
Sd Card ◽  
Collection Time

The data collector to calculate the efficiency of the pure sine inverter DC to AC based on the level of efficiency, voltage and current stored automatically in Micro SD has been successfully designed. This data collector is built from the Arduino Nano (ATmega328) module as the controller and uses a Micro SD Card as a storage medium. The equipment storage results are displayed in real time using the RTC and LCD as a display medium for the measurement results of the voltage sensor and current sensor. The data logger is designed to be useful for storing data from the measurement results of the DC to AC inverter which consists of voltage, current and data collection time. The data every 16 seconds will be stored automatically on the Micro SD. The results of the reading error of the voltage sensor and current sensor are 1.088% and 1.72%, respectively. The results of the error reading the voltage sensor and current sensor are still precise, so the efficiency obtained in this study is 78.37%.

scholarly journals Rancang Bangun Alat Deteksi Sag Tegangan Menggunakan Sistem Data Logger

2021 ◽  
Vol 8 (1) ◽  
pp. 1-5
Author(s):  
Arizal Maulana Pratama ◽  
Ajeng Bening Kusumaningtyas ◽  
Ferdian Ronilaya ◽  
Sapto Wibowo
Keyword(s):  
Digital Signal ◽  
Voltage Sensor ◽  
Voltage Sag ◽  
Electronic Components ◽  
Data Logger ◽  
Electrical Systems ◽  
Lcd Display ◽  
Voltage Sag Detection ◽  
Sd Card ◽  
Design And Manufacture

This research discusses the design and manufacture of a voltage sag detection device using a data logger system. Voltage sag detection device to detect the presence of voltage sag which is one of the power quality problems in industrial electrical systems. Voltage sag can cause disturbances in electronic components that are sensitive to changes in voltage values. In this device, the voltage sag is detected using a voltage sensor by reading the RMS voltage from the PLN 220V AC source, then it is converted into a digital signal. The digital signal is sent to the ESP32 module to be processed and outputs a voltage value which is then displayed on the LCD Display. The voltage value data collection is carried out every <10ms and the data taken is the voltage value <90% of the rms voltage. The data taken is then saved to a micro SD card and displayed on the LCD Display. Several tests were carried out to ensure the performance of the voltage sag detector as designed. By switching the 110 / 220VAC transformer connected to the voltage sensor for 10 seconds, 12 seconds and 17 seconds. Based on these tests, the voltage sag detector can read and store the voltage sag data when the voltage read is below 90% of the rms voltage.

scholarly journals Nine Channel Temperature Data Logger in Measuring the Effectiveness of the Sterilization Process of Medical Instruments with Dry Sterilization

2021 ◽  
Vol 1 (1) ◽  
pp. 26-33
Author(s):  
Nurul Al Istigho Farola ◽  
Her Gumiwang ◽  
Sumber Sumber
Keyword(s):  
Measurement Data ◽  
Temperature Data ◽  
Average Error ◽  
Data Logger ◽  
Channel Temperature ◽  
Measurement Results ◽  
Temperature Data Logger ◽  
Sterilization Process ◽  
Thermocouple Temperature ◽  
Sd Card

Measuring the temperature on the dry sterilizer is very necessary because the temperature inside the dry sterilizer has the possibility that the temperature is not the same as the temperature that has been set and is displayed on the display. If the temperature in the dry sterilizer does not match the standard setting temperature for the sterilization process, then the sterilization process is said to be imperfect The purpose of this study is to record and monitor whether the distributed temperature in the sterilization chamber corresponds to the setting temperature. The workings of the temperature data logger tool is that the type K thermocouple temperature sensor will detect the temperature which then enters the analog signal conditioning circuit which then enters the ATMegga 2560 which has been given a program and processed in such a way, then the temperature will be displayed on a 4x20 character LCD. Temperature measurement data will be saved to the SD Card every 10 seconds in the form of a TXT file. This research has been used to record 2 sterilizers and compared with the Madgetech OctTemp2000 data logger. Based on data measurements and comparisons, the average error was obtained at a temperature of 50ºC with the smallest error value of 0.7% and the largest value of 3.9%. At a temperature of 100ºC, the smallest error value is 1.6% and the largest is 10.5%. Then at a temperature of 120ºC the smallest error value is 0.0% and the largest is 8.5%. This research can be used to help analyze the distribution of temperature in a room. With these measurement results, it can be said that this study still has afairly high error value at several measurement points.

scholarly journals STORAGE MEDIUM FOR AVULSED TEETH: A LITERATURE REVIEW

2021 ◽  
Vol 9 (08) ◽  
pp. 874-886
Author(s):  
Navpreet Kaur ◽  
Nikhil Srivastava ◽  
Vivek Rana ◽  
Noopur Kaushik ◽  
Tushar Pruthi
Keyword(s):  
Literature Review ◽  
Periodontal Ligament ◽  
Storage Medium ◽  
Avulsion Injury ◽  
Storage Media ◽  
Pdl Cells ◽  
Traumatic Dental Injuries ◽  
Dental Injuries

Avulsion injury is one of the most severe types of traumatic dental injuries. Following avulsion, periodontal ligament tissues are injured and the vessels and nerves of the pulp rupture at the apical foramen which causes pulp necrosis. In studies it was reported that the key to retention of the knocked-out teeth was to maintain the viability of the periodontal ligament. Storage media plays an important role in preserving the viability of PDL cells during extra alveolar time. This article highlights the different storage medias available for avulsed teeth, along with their merits and demerits.

scholarly journals Microhardness and fluoride release of restorative materials in different storage media

2007 ◽  
Vol 18 (4) ◽  
pp. 309-313 ◽  
Author(s):  
Kélio Garcia Silva ◽  
Denise Pedrini ◽  
Alberto Carlos Botazzo Delbem ◽  
Mark Cannon
Keyword(s):  
Static Load ◽  
Initial Surface ◽  
Fluoride Release ◽  
Storage Medium ◽  
Surface Microhardness ◽  
Storage Media ◽  
All Solutions ◽  
Significant Difference ◽  
Restorative Materials ◽  
Ph Cycling

This study evaluated the surface microhardness and fluoride release of 5 restorative materials - Ketac-Fil Plus, Vitremer, Fuji II LC, Freedom and Fluorofil - in two storage media: distilled/deionized water and a pH-cycling (pH 4.6). Twelve specimens of each material, were fabricated and the initial surface microhardness (ISM) was determined in a Shimadzu HMV-2000 microhardness tester (static load Knoop). The specimens were submitted to 6- or 18-h cycles in the tested media. The solutions were refreshed at the end of each cycle. All solutions were stored for further analysis. After 15-day storage, the final surface microhardness (FSM) and fluoride release were measured. Fluoride dose was measured with a fluoride-specific electrode (Orion 9609-BN) and digital ion analyzer (Orion 720 A). The variables ISM, FSM and fluoride release were analyzed statistically by analysis of variance and Tukey's test (p<0.05). There was significant difference in FSM between the storage media for Vitremer (pH 4.6 = 40.2 ± 1.5; water = 42.6 ± 1.4), Ketac-Fil Plus (pH 4.6 = 73.4 ± 2.7; water = 58.2 ± 1.3) and Fluorofil (pH 4.6 = 44.3 ± 1.8; water = 38.4 ± 1.0). Ketac-Fil Plus (9.9 ± 18.0) and Fluorofil (4.4 ± 1.3) presented higher fluoride release in water, whereas Vitremer (7.4 ± 7.1), Fuji II LC (5.7 ± 4.7) and Freedom (2.1 ± 1.7) had higher fluoride release at pH 4.6. Microhardness and fluoride release of the tested restorative materials varied according to the storage medium.

scholarly journals Medios de almacenamiento y transporte para dientes avulsionados

2014 ◽  
Vol 10 (2) ◽  
pp. 24
Author(s):  
Carmen Inocencia Quintana del Solar
Keyword(s):  
Storage Medium ◽  
Tooth Avulsion ◽  
Storage Media ◽  
Medium Storage

Se realizó una revisión de la literatura con respecto a los medios de almacenamiento para dientes avulsionados. Se utilizó el buscador Medline, incluyendo aquellas publicaciones entre 1980 - 2007 en las que apareciesen como palabra clave: “viability”, “storage medium”, “storage media”, “tooth avulsion” y “avulsion”. Los mejores medios son aquellos que tienen las siguientes características: pH y osmolalidad fisiológica, contengan nutrientes, sean líquidos estériles y estén disponibles en el lugar del accidente. Los resultados de estos estudios muestran que la leche fresca descremada pasteurizada fue mejor que la saliva, el agua, las soluciones para lentes de contacto y el Gatorade®. El HBSS y el Viaspan fueron mejores que la leche, el propóleo y el agua de coco. El Viaspan fue igual a, o mejor que, el HBSS para preservar las células del ligamento periodontal. A pesar de su efectividad en mantener la viabilidad celular, el Viaspan y el HBSS son costosos y no están disponibles rápidamente en el lugar del accidente a diferencia de la leche.

Complex Impedance Measurement System for the Frequency Range from 5 kHz to 100 kHz

2015 ◽  
Vol 644 ◽  
pp. 133-136 ◽  
Author(s):  
Mitar Simić
Keyword(s):  
Measurement System ◽  
Integrated Circuit ◽  
Complex Impedance ◽  
Impedance Measurement ◽  
Wide Range ◽  
Measurement Results ◽  
Improved Design ◽  
Sd Card ◽  
Complex Impedance Measurement ◽  
Line Analysis

The improved design of previously developed complex impedance measurement system is described. Realized system for measurement of complex impedance is based on integrated circuit AD5933 which is controlled by microcontroller ATmega128. Device has full standalone capabilities with LCD for displaying of results and keyboard for configuration on the field. Created report with measured values of impedance magnitude and phase angle is stored on micro SD card in format compatible with MS Excel which ensures easy off-line analysis on PC. Realized device is equipped with self-calibration system which ensures high accuracy in wide range of impedance and frequency. In the aim of the verification of developed system, the measurement results are plotted and compared with theoretical impedance values. Realized system can be used for complex impedance measurement, impedance spectrometry, biomedical and automotive sensors, proximity sensors, FFT processing, structural health monitoring, etc.

The Modern Current Sensors of Synthetic Magnetic Resin Part 2 - AC Current Sensor up to 2 000 amps

2014 ◽  
Vol 1082 ◽  
pp. 581-587 ◽  
Author(s):  
Jaroslav Lokvenc ◽  
René Drtina ◽  
Josef Šedivý
Keyword(s):  
Magnetic Material ◽  
Power Electronics ◽  
Magnetic Materials ◽  
Current Sensor ◽  
Magnetic Alloy ◽  
Measurement Results ◽  
Resin Part ◽  
Ac Current ◽  
Current Sensors ◽  
Magnetic Resin

The article presents previously unpublished results of the development of current sensors, designed on the basis of cold-cast possibilities of magnetic materials and their applications for measurement purposes in the field of electricity and power electronics. Listed are the fundamental characteristics of the magnetic alloy resin schematic draft sensor dI/dt of a core of magnetic material molded and the measurement results of the prototype produced industrially.

scholarly journals Design of an Ultra-Low Powered Data-Logger for Stand-Alone PV Energy Systems

2020 ◽  
Vol 4 (6) ◽  
Author(s):  
Asif Ur Rehman ◽  
M. Tariq Iqbal
Keyword(s):  
Web Server ◽  
Energy Systems ◽  
Energy System ◽  
Sleep Mode ◽  
Toggle Switch ◽  
Deep Sleep ◽  
Web Portal ◽  
Data Logger ◽  
C 30 ◽  
Sd Card

This paper presents an open-source, ultra-low powered data-logger for off-grid photovoltaic (PV) energy systems. Deep-sleep mode of ESP32-S2 microcontroller is used along with voltage, current, and light sensors for logging the data of PV energy system to an external micro SD card. A toggle switch is used to switch the operational modes of data-logger between deep-sleep and web-server modes. Real-time PV data can be monitored in a local web-portal programmed in the microcontroller. The same web-portal is also used to check and download the historical data of a PV energy system. The energy consumption of the designed system is 7.33mWh during deep-sleep mode and 425mWh during the web-server mode. The total cost of the designed data-logger is C$ 30.

scholarly journals ALGORITHMIC SUPPORT OF THE CONTROL SYSTEM OF FORCE OF JOINT AND DISJOINT OF ELECTRICAL CONNECTORS

2018 ◽  
Vol 22 (4) ◽  
pp. 94-103
Author(s):  
P. A. Akulov ◽  
D. I. Petreshin
Keyword(s):  
Control System ◽  
Storage Medium ◽  
Modes Of Operation ◽  
Algorithmic Support ◽  
Measurement Results ◽  
Electrical Connectors

A description is given of an installation for measuring the force of joint and disjoint of electrical connectors. The structure of the installation is described. The developed algorithm of the installation allows testing connectors in several modes of operation with the possibility of editing parameters, performs self-diagnostics of the system and displays the measurement results both on the screen and of external storage medium.

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