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All Journal JMECS (Journal of Measurements, Electronics, Communications, and Systems) Jurnal Teknik dan Science (JTS)
Gunova, Violla
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Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology

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A Controlled Gas-based Dehydrator for Drying Bananas in The Home Industry Amri, Iful; Kurniawan, Sigit; Gunova, Violla; Arianza, Yumi; Parida, Della Exsal
JMECS (Journal of Measurements, Electronics, Communications, and Systems) Vol. 10 No. 2 (2023): JMECS
Publisher : Universitas Telkom

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25124/jmecs.v10i2.6826

Abstract

In order to increase the durability and quality of bananas, this research discusses the design of an economical gas-based dehydrator with the application of PID control for valves and gas, specifically for small and medium-scale home industries. The main objective was to develop a cost-effective and efficient solution for drying bananas without sacrificing nutritional quality and taste. The dehydrator system is designed using PID control to obtain accurate and precise temperatures during the drying process. The algorithm is that the PID control will regulate and adjust how much gas is released through the valve based on the difference between the desired and actual temperature in the drying room. The best constants of PID we get are P = 1, I = 2, and D = 3. By applying these constants, the time taken by the system to change a signal from 30oC to 100oC of temperature is about 5 minutes, with a maximum overshoot of about 10%. In addition, the system required 25 minutes to achieve a steady state with an error value of about 5% from the setpoint. From the results of this experiment, it would be declared that the performance of the dehydrator built has indicated good performance. The minimum temperature that could be generated by the dehydrator is 90oC, while the maximum temperature is set 150oC. The experiment shows that this dehydrator can reduce the water content of a 1-2 g banana fruit by up to 50% within 60 minutes and 26% for a 10 g banana fruit mass simultaneously. The results also show that the dehydrator maintained optimal banana fruit quality based on texture, colour, and taste. Thus, these results indicate the great potential of gas-based dehydrators with PID control as an innovative solution for the home fruit processing industry, offering a combination of efficiency and cost-effectiveness
Analisis Akurasi dan Presisi Sensor Ultrasonik Estimasi Level Tong Sampah Pintar Berbasis Arduino Gunova, Violla
Jurnal Teknik dan Science Vol. 5 No. 1 (2026): Februari : Jurnal Teknik dan Science
Publisher : Asosiasi Dosen Muda Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56127/jts.v5i1.2634

Abstract

This study analyzes the accuracy and precision of ultrasonic sensors for estimating waste levels in two sizes of Arduino-based smart trash cans in a community service program at a private high school in Jambi City. Two cardboard trash can prototypes were used as learning media, namely a small trash can measuring 10 cm × 10 cm × 20 cm and a large trash can measuring 30 cm × 30 cm × 50 cm. The testing was conducted by measuring the distance between the sensor and the surface of the waste/object at several predetermined reference distances using a ruler. For each distance condition, 10 readings were taken at 2-second intervals. The evaluation parameters included the mean, standard deviation (SD), bias, MAE, and RMSE. The results show that the average readings on both prototypes were close to the reference distance with a small bias. The variation in readings tended to increase at close distances, with the highest SD at a distance of 5 cm for both bins. When the bins were empty (20 cm for the small bin and 50 cm for the large bin), the measurements tended to be more accurate and precise than when the bins were full. In aggregate, the MAE and RMSE of the large bin (≈0.166 cm and ≈0.235 cm) were smaller than those of the small bin (≈0.225 cm and ≈0.335 cm). These findings confirm that ultrasonic sensors are suitable for monitoring waste levels, with the recommendation to avoid readings at very close distances and to apply data processing to improve the stability of level estimates.
Co-Authors Arianza, Yumi Iful Amri Parida, Della Exsal Sigit Kurniawan