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K N, nurwijayanti
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Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering

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Analisis Perbandingan Throttle Position Sensor (TPS) Standar Dan Racing Terhadap Kinerja Motor CB150R Apriyanti, Aulia; K N, nurwijayanti
JURNAL TEKNOLOGI INDUSTRI Vol. 14 No. 1 (2025): Jurnal Teknologi Industri
Publisher : Universitas Dirgantara Marsekal Suryadarma

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35968/jti.v14i1.1716

Abstract

Accurate temperature monitoring is essential in storage applications that require precise environmental control. This study aims to analyze the accuracy and stability of five digital temperature sensors—DHT11, DHT22, DS18B20, BMP085, and BMP280—by comparing their measurements with a mercury thermometer certified by the Indonesian National Standard (SNI) as the reference. Experiments were conducted in both indoor and outdoor environments using a NodeMCU ESP8266, with repeated measurements performed to evaluate consistency. The analysis was carried out using average measurement deviation and percentage error. The results show that the BMP280 provides the highest accuracy in indoor conditions, with an average deviation of 0.52 °C and a 2.0% error rate, whereas the DS18B20 demonstrates superior accuracy and stability in outdoor conditions, with deviations as low as 0.4 °C in several test points. The DHT11 and DHT22 remain suitable for simple applications with low precision requirements, while the BMP085 exhibits the lowest performance in terms of both accuracy and consistency. These findings offer practical guidance for selecting appropriate temperature sensors based on environmental conditions and application needs.
Rancang Bangun Antena Mikrostrip Mimo 2×2 Square Patch U-Slot Untuk Komunikasi 5g Frekuensi 2,3 GHz Handayani, Esti; K N, nurwijayanti
JURNAL TEKNOLOGI INDUSTRI Vol. 14 No. 2 (2025): Jurnal Teknologi Industri
Publisher : Universitas Dirgantara Marsekal Suryadarma

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35968/jti.v14i2.1717

Abstract

The 2.3 GHz frequency band is one of the recommended spectrums for 5G deployment due to its favorable propagation characteristics and capability to support high data throughput. However, microstrip antennas operating in this band often suffer from limited bandwidth and radiation efficiency. This research aims to design and implement a 2×2 MIMO microstrip antenna using a square patch with a U-slot and an inset-feed technique to enhance bandwidth and radiation performance for 5G applications. The initial antenna dimensions were calculated using standard microstrip theory, followed by modeling and optimization using CST Microwave Studio Suite 2019. The optimized antenna was then fabricated and tested using a Vector Network Analyzer (VNA) and radiation pattern measurements. Experimental results show that the antenna operates around 2.3 GHz with bandwidth values ranging from 61 to 65 MHz, VSWR below 1.2, and an axial ratio of 1.23 dB, indicating circular polarization. Additionally, the measured gain reaches 6.98 dB. These results demonstrate that the U-slot modification combined with inset-feed implementation effectively improves antenna performance, making the design suitable for MIMO systems in 5G networks.
RANCANG BANGUN PENGUKURAN SUHU DAN KELEMBABAN PADA PENYIRAMAN OTOMATIS UNTUK TANAMAN KACANG TANAH BERBASIS IOT Nugroho, Nicholas Herdiyanto; K N, Nurwijayanti
JURNAL TEKNOLOGI INDUSTRI Vol. 14 No. 2 (2025): Jurnal Teknologi Industri
Publisher : Universitas Dirgantara Marsekal Suryadarma

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35968/jti.v14i2.1731

Abstract

Efficient, automated watering is crucial in modern agriculture. IoT (Internet of Things)-based automatic watering offers a solution to this challenge, particularly for peanut plants, which require precise and accurate watering. This research aims to design and test an IoT-based automatic watering system for peanut plants. The system is designed to optimize water use and increase efficiency in peanut cultivation. Identified problems include difficulty in determining the correct amount of water, water wastage due to manual watering, and inaccurate visual observations. This research focused on the design of the automatic water regulation system, the water pump control method, and the sensitivity of the soil moisture sensor in the system. Test results showed that the system performed well. The soil moisture sensor can detect water levels and automatically control the water pump. The water pump activates when soil moisture is below 30% and shuts off when it reaches 60%. There was no discrepancy between the sensor readings and manual calculations, demonstrating the system's accuracy.
Co-Authors Apriyanti, Aulia Esti Handayani Nugroho, Nicholas Herdiyanto