PERTANIKA JOURNAL OF SCIENCE AND TECHNOLOGY

 

e-ISSN 2231-8526
ISSN 0128-7680

Home / Regular Issue / JST Vol. 32 (2) Mar. 2024 / JST-4243-2023

 

Baby Weight and Length Measurement System with Data Storage Using MySQL Database

Rifqi Kamaddin Sholeh Lubis, Rahmat Rasyid and Meqorry Yusfi

Pertanika Journal of Science & Technology, Volume 32, Issue 2, March 2024

DOI: https://doi.org/10.47836/pjst.32.2.03

Keywords: Anthropometric, HC-SR04 sensor, load cell, NodeMCU ESP32, website

Published on: 26 March 2024

Baby weight and length measurement system has been designed based on ultrasonic and load cell sensors with data storage using MySQL database and website interface. This research aims to produce a baby weight and length measurement system with microcontroller NodeMCU ESP32. The system is designed with an ultrasonic sensor HC-SR04 and four half-bridge load cells of 50 kg. The ultrasonic sensor works on the piezoelectric and inverse piezoelectric principles, while load cell sensors work on strain gauge principles. An ultrasonic sensor measures body length, while a load cell sensor measures body weight. According to the Ministry of Health of the Republic of Indonesia’s regulations, this system also has an LCD 20×4 to display measurement and nutritional status assessment results. The experiment used four doll objects with different lengths and weights. This research shows that the ultrasonic sensor HC-SR04 used in this research has an average error of 0.494% in length measurement. The load cell sensor and HX711 ADC used in this research has an average error of 0.949% in weight measurement. The designed system automatically assesses the nutritional status and stores the measurement result and nutritional status in the database to be displayed on the website.

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