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INDONESIA
Jurnal Mahasiswa TEUB
Published by Universitas Brawijaya
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Core Subject : Education,
Education
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Articles 2,116 Documents
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RANCANG BANGUN SMART WATCH PENGUKUR DENYUT NADI, TEKANAN DARAH DAN OXYMETER NONINVASIVE DENGAN SELECTIVE WAVELENGTH SENSOR BERBASIS IOT Prabowo, Muhamad Romadhani; Nurussa’adah, n/a; Hasanah, Rini Nur
Jurnal Mahasiswa TEUB Vol. 12 No. 4 (2024)
Publisher : Jurnal Mahasiswa TEUB

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Abstract

Stroke is a focal or global neurological disorder that occurs acutely and is related to cerebral circulation disturbances. It occurs when blood cannot reach the brain to supply oxygen and nutrients and to remove waste products, which can lead to brain cell death. Stroke recurrence can be prevented by controlling risk factors such as hypertension, heart disease, and diabetes mellitus. More than 50% of stroke cases are related to hypertension, while 1 in 4 cases are related to high levels of bad cholesterol (Low-Density Lipoprotein/LDL). The aim of this research is to design a wireless sensor system that can measure heart rate, oxygen level, and blood pressure non-invasively, which can be integrated with a microcontroller for transmission to monitoring devices.Photoplethysmography (PPG), as a non-invasive tool for monitoring various cardiovascular parameters, has become popular due to its easy integration with wearable devices and its uniform properties. This research proposes the development of an advanced PPG sensor design using three LED light variants as a light source with fixed wavelengths. The proposed sensor will be integrated with a smartwatch capable of operating in the Internet of Things (IoT) network, creating a more holistic and digitally connected monitoring system. From the testing results of the PPG sensor on the noninvasive smartwatch for measuring heart rate, bloodpressure, and oximeter with selective wavelength sensor based on IoT, the accuracy level of blood pressure readings was found to be 99.8%, heart rate 99.48%, and oxygen levels 99.96%. Testing was performed by comparing the reading data with reference data from commercial sphygmomanometers and oximeters. The smartwatch uses Bluetooth Low Energy communication protocol tocommunicate with Android device applications. The received data is processed and stored in Firebase Cloud Storage. Users can monitor reading history and predict the risk of ischemic stroke. Keywords: Photoplethysmography, Stroke, Internet of Things, MAX30105, ESP32
RANCANG BANGUN SISTEM MONITORING KADAR BIOETANOL PADA ALAT PEMURNIAN BIOETANOL TERINTEGRASI CYBER-PHYSICAL SYSTEM Pasaribu, Dimpos Fransiskus Xaverius; Nurussa’adah, n/a; Setyawati, Onny
Jurnal Mahasiswa TEUB Vol. 12 No. 4 (2024)
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Currently, the Indonesian government is promoting the development of renewable energy sources as an alternative to etroleum-based fuels. This effort is reflected in Presidential Regulation No. 40 of 2023, which governs policies on the provision of bioethanol as a biofuel. However, not all bioethanol can be used as fuel; only bioethanol with a concentration above 99%, known as fuelgrade, can be utilized. Due to this problem, there is a need to design and build a device capable of purifying regular bioethanol to achieve fuel-grade concentration, equipped with a monitoring system. This monitoring system is implemented to facilitate the testing and analysis of the purification process. The device uses the pervaporation method for purification, utilizing zeolite nanoparticle membranes as the purification medium. The device is equipped with an MQ3 ethanol sensor as the main component of the monitoring system. To enhance monitoring capabilities, the device is also integrated with a Cyber-Physical System. Thisintegration uses the ESP32 microcontroller to transmit data from the purification device to an Android application and an LCD monitor. This provides ease for researchers in directly monitoring the results of the purified bioethanol. From the research and analysis results, it was found that the Bioethanol Purification Monitoring System provided ethanol concentration readings with an average error of ±4% and an accuracy level of ±95%. The performance of the Cyber-Physical System built can transmit readingsfrom the MQ3 sensor to the LCD monitor both via cable and wirelessly using the Bluetooth protocol controlled by the ESP32. Data can be transmitted continuously over a long period without significant interference. The purification system built can purify ethanol from a 70% concentration to 99% with two purification cycles. The first purification cycle produced ethanol with an 84% concentration (a 14% increase), and the second cycle produced ethanol with a 99% concentration (a 15% increase). Keywords: Bioethanol, Monitoring System, CyberPhysical System, MQ3, ESP32
PERBANDINGAN PERFORMA PROTOKOL COAP DAN HTTP PADA MIKROKONTROLER ESP32 SEBAGAI PERANGKAT IOT PEMANTAU KUALITAS UDARA Wijayanto, Micko; Muttaqin, Adharul; Razak, Angger Abdul
Jurnal Mahasiswa TEUB Vol. 12 No. 4 (2024)
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The development of the Internet of Things (IoT) is driving transformation in various sectors of life. One important aspect of IoT technology is data communication, which has various solutions, including the Internet. With a variety of internet protocol solutions available, appropriate protocol recommendations are needed for IoT needs, such as CoAP or HTTP. This research compares the performance of these two protocols using an ESP32 Microcontroller integrated with MQ7 and DHT11 sensors for air quality monitoring. Performance assessments include data communication network, power consumption, and memory requirements. Implementing the CoAP Protocol requires configuration so that data packets can capture tokens provided by clients. Data communication analysis, using Wireshark software, shows that the average delay of CoAP is 80% higher compared to HTTP, and the average power consumed by CoAP is also 4% greater. However, the average throughput measured is 27% higher in HTTP compared to CoAP, and CoAP's storage efficiency is also 3% better. Meanwhile, both protocols have insignificant differences in data delivery reliability and dynamic memory usage. Keywords: Internet of Things, Microcontroller ESP32, CoAP, HTTP, Performance Comparasion
RANCANG BANGUN SISTEM PENGUKURAN TINGGI TANAMAN SAYUR DAN SISTEM MONITORING PERTUMBUHAN TANAMAN MENGGUNAKAN METODE REGRESI POLINOMIAL Fadhlurrahman, Adam Farrel; Nurussa’adah, n/a; Siwindarto, Ponco
Jurnal Mahasiswa TEUB Vol. 12 No. 4 (2024)
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Abstract

Plant height is an important indicator to show the performance of the media or agricultural land. Therefore, this research aims to realize an effective and efficient plant height measurement system for lettuce vegetable cultivation using ultrasonic sensors, and realize a growth monitoring system. The sensor measurement data is processed using the polynomial regression method to determine the plant growth graph. Ultrasonic sensor testing for plant height measurement shows the largest error value that occurs is 0.045%. The monitoring system test results show that all sensor data can be displayed on the TFT display and the measurement results are successfully stored in the Micro SD Card. Overall, the lettuce plant height measurement system using two ultrasonic sensors shows the results of the regression equation y = 0.0025x2 + 0.4976x - 1.5397 and y = -0.002x2 + 0.6246x - 2.4707. The polynomial regression equation is used to generate growth notifications displayed on the TFT display. With this system, it is expected to facilitate farmers in monitoring plant growth and decision making. Keywords— Plant Height Measurement, Monitoring System, Ultrasonic Sensor, Polynomial Regression.
EVALUASI SUSUT DAYA PADA JARINGAN DISTRIBUSI PENYULANG GRAHA KOTA DI KABUPATEN SIDOARJO DENGAN METODE MODIFIED CARSON Rifki, Mohammad Ya’kub Rizal; Hasanah, Rini Nur; Wijono, n/a
Jurnal Mahasiswa TEUB Vol. 12 No. 4 (2024)
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Abstract

Electrical power loss is a crucial issue for PLN. To avoid a total blackout on the system, rotating blackouts are often carried out. This causes the electrical power supplied to consumers to be smaller than it should be. This power loss always exists because the equipment used does not have a 100% efficiency level. There are developments in the electricity distribution network which is becoming more complex with an increase in consumers, the addition of new branches, and variations in load additions. More systematic methods are needed to calculate and manage these losses. In this research, the Modified Carson calculation process and simulation were carried out using the ETAP 19.0.1 application which aims to determine the power loss in the Graha Kota feeder. In this feeder there are 2 types of phase cables, namely 150 mm2 and 240 mm2 phase cables, and a load of 15391.26 kVA, then this data is entered into the Modified Carson calculation to get the Modified Carson impedance value. Then a simulation is carried out on the ETAP 19.0.1 application to get the results of existing losses and Modified Carson power losses. From the results of the analysis carried out, the percentage of total power loss to the existing system power is 7.49%. Meanwhile, the percentage of total power loss on the power of the Modified Carson system produces a total power loss percentage of 10.69%. The percentage difference between the two methods is 3.2%. Referring to SPLN 1:1987, the permitted power loss is only 10%, so the calculation results of the Modified Carson method which involves more accurate impedance do not meet the established standards, so efforts are needed to reduce losses on the Graha Kota feeder. Keywords: Power Loss, Feeder, Distribution
DESAIN SISTEM COLD STORAGE CONTROL PADA PENYIMPANAN BUAH DAN SAYUR PASCAPANEN BERBASIS LOGIKA FUZZY UNTUK OPTIMALISASI SUHU DAN KELEMBAPAN Wibowo, Rafli Prihantono Putra; Rusli, Moch.; Ambarwati, Rusmi
Jurnal Mahasiswa TEUB Vol. 12 No. 4 (2024)
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Abstract

Post-harvest handling is one of the strategies to support food security in Indonesia. This handling is necessary because harvestedproducts, such as various types of leafy and fruit vegetables, have different shelf lives (Arista, 2021). Additionally, damage to harvested products occurs more quickly if handling during or after harvesting is poor. Therefore, the storage of post-harvest products requires a cooling container to maintain the quality of the harvested goods. To ensure ideal storage conditions for items that need specific conditions, a cold storage control system is a strategic step to enhance operational performance and reduce product losses due to damage during storage. To ensure food quality and safety, the cold storage parameters that need to be controlled are temperature, humidity, and air quality (Mohammed et al., 2022).This study was conducted to explain the process of controlling temperature and relative humidity in a cold storage using a fuzzylogic controller. In the control process, it was found that the chiller system has a steady state time of 4000 s or 66 minutes and 40 seconds with a steady state error of 1.63%. When disturbed, the recovery time obtained is 1,074 s (17.9 minutes) with the steady state error increasing to 2.7%. Meanwhile, the freezer system has a steady state time of 3,774 s or 62 minutes and 54 seconds, no overshoot, and no steady state error. However, when disturbed, the freezer system will have a steady state error of <1% with a recovery time of 1,094 s or 18.2 minutes. For the humidity control system, to reach 90% RH, it takes 1,950 s or 32 minutes and 30 seconds with no steady state error. However, the humidity system graph has an overshoot of 5%. When the humidity system is disturbed, the recovery time (rt) is 200 s or 3.3 minutes. However, after the disturbance, a steady state error of 0.4% is obtained. Keywords: Cold Storage Control, Temperature and humidity control, Fuzzy Logic Controller
ANALISIS TRANSIEN VSC-LCC HVDC TERKONEKSI WIND FARM PADA SISTEM KELISTRIKANMADURA Dzikrullah, Hafeeza Rinn; Hasanah, Rini Nur; Suyono, Hadi
Jurnal Mahasiswa TEUB Vol. 12 No. 4 (2024)
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Stabilitas transien terjadi saat sistem tenaga mempertahankan frekuensi, tegangan, arus tetap stabil atau konstan jika terjadi gangguan seperti gangguan hubung singkat. Semakin cepat sebuah sistem kembali pulih pada keadaan steady state semakin kecil kemungkinan adanya kerusakan pada sistem. Untuk itu diperlukan analisis pada sistem dan alternatif tambahan yang dapat mengurangi waktu transien. Penilitian ini membahas mengenai respon transien saat ada gangguan hubung singkat pada sistem kelistrikan Madura 150kV. Dengan tiga rangkaian berbeda yaitu rangkaian AC, rangkaian dengan windfarm dan rangkaian HVDC VSC-LCC yang disimulasikan dengan software DIGSILENT. Hasil simulasi menunjukan perbedaan tegangan, serta respon arus dan frekuensi pada bus Sumenep 2 setelah gangguan hubung singkat. Kata kunci—HVDC, Line Comutated Converter (LCC), Time domain simulation, Voltage Source Converter (VSC)
ANALISIS RANCANGAN OPERASI SISTEM PEMBANGKIT LISTRIK TENAGA HYBRID (PLTS – PLTB) ENERGI TERBARUKAN PADA GEDUNG BERSAMA TEKNIK ELEKTRO UNIVERSITAS BRAWIJAYA Hidayat, n/a; Nurwati, Tri; Wibawa, Unggul
Jurnal Mahasiswa TEUB Vol. 12 No. 4 (2024)
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Abstract

The increasing need for energy sources is not commensurate with the limited nature of fossil energy, so a transition to renewable energy is needed. However, the availability of renewable energy for electricity generation is still limited and expensive. To overcome this, a combination or hybrid of several power plants is needed. Hybrid operation has long been known as a solution to increase the amount of power generation from renewable energy plants. The aim of this research was to determine the results of designing a hybrid system (PLTSPLTB) using hybrid design software and analyzing it from technical and economic aspects. The method used is in the form of calculations on technical and economic aspects through parameters in the form of average hourlyload, solar radiation, wind speed as well as component specification and price data. Based on the results of operating system design using hybrid design software, it was found that the results of optimizing solar panels with a capacity of 2.75 kW, 1 wind turbine, 4 kW inverter, and connected to the PLN grid produce electrical energy of 11,910 kWh/year and renewable penetration of 41.5%. When installing a hybrid system (PLTS-PLTB), the energy purchased to the PLN network is 6,968 kWh and the energy sold to the network is 1,235 kWh for one year. From a technical aspect, it requires 10 solar panels with 5 solar panels installed in series and 2 solar panels installed parallel, the highest average solar panel output power occurred in September at 13.52332 kW and the lowest average output power occurred in February at 9.89158 kW. The highest average output power of wind turbines occurred in September at 196.583 W or 0.197 kW and the lowest average output power occurred in March at 15.625 W or 0.0156 kW. From the economic aspect, the results show a Net Present Cost (NPC) of IDR 252,264,302.01, Total Annualized Cost (TAC) of IDR 14,981,718.67, Cost of Energy (COE) of IDR 1,268.45 per kWh. Keywords: Hybrid operation, Calculation, Solar radiation, Wind speed.
RANCANG BANGUN PENAMPIL STATUS KONDISI ANGIN SECARA ONLINE MENGGUNAKAN ARDUINO NANO Ibtihal, Moch Fahulul; Muslim, Muhammad Aziz; Setyawan, Raden Arief
Jurnal Mahasiswa TEUB Vol. 12 No. 4 (2024)
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Abstract

Indonesia is the 15th largest country in the world and the largest archipelago in the world. With Indonesia's vast territory, the country has diverse natural conditions so that natural disasters that occur also vary in each region. One of the many natural disasters that occur in Indonesia is strong winds. Strong winds are quite dangerous because they cannot be predicted. This can certainly harm the community. Prevention efforts are very important in dealing with this phenomenon, such as periodic observation of wind speed. The solution to this problem is to design a tool that can provide wind speed information that can be accessed through the website and can provide warnings. The making of this tool consists of the main parts in the form of a microcontroller, wind speed sensor, humidity temperature sensor, and GSM module. The results of the sensor will be processed by a microcontroller to be sent via a GSM module connection and can be accessed using the internet through a website that has been created. From the results of the tool design, if the wind speed ≥11 m / s and wind acceleration ≥ 5.5 m / s then on the website there is a danger sign display and the alarm on the tool will turn on. Keywords— microcontroller, wind speed sensor, GSM module
ANALISIS KOORDINASI SISTEM PROTEKSI RELAI OVERCURRENT PADA JARINGAN DISTRIBUSI UNIT 3A PLTU PAITON Andreyanto, Tegar Setyo; Dhofir, Moch.; Hasanah, Rini Nur; Siswandi, Wawan
Jurnal Mahasiswa TEUB Vol. 12 No. 4 (2024)
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This research aims to determine the appropriate OCR settings to handle potential short-circuit currents in the distribution network of Unit 3A at Paiton Power Plant under existing load conditions. This study focuses on the Overcurrent Relay (OCR) protection device. The short-circuit current calculations are performed mathematically using the per-unit method and sequence impedance circuit. The OCR resetting calculations in this study apply the British Standard BS-142 for relay current settings, the IEC 60255-151 standard for inverse relay operating time, and the IEEE 242 standard for relay coordination time delay. In this study, short-circuit current simulation and OCR operation simulation are conducted using the ETAP 12.6 application. The results of this research indicate the OCR relay settings as follows: Extremely Inverse with a Pickup of 0.88 and TMS of 0,425, Very Inverse with a Pickup of 0.4 and TMS of 0.1, Long Time Inverse with a Pickup of 0.75 and TMS of 0.025. Additionally, relay coordination with a time delay of 0.2-0.4 seconds is achieved. Based on the simulations, the OCR operates effectively and in compliance with the standards. Keywords— Overcurrent relay, Short Circuit, ETAP, Relay Setting

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