Development of a Body Mass Index Machine and Program Recording User Information

การพัฒนาเครื่องชั่งน้ำหนักดัชนีมวลกายและโปรแกรมบันทึกข้อมูลผู้ใช้งาน

Abstract

          Scales with a typical body mass index have no user data recorded. This makes it impossible to recall data for body mass index analysis. In this research, we developed a body mass index weighing scale that could record user data. Body mass index calculations were performed using four 50 kg weight sensors that could weigh up to 200 kg and a height sensor model WCMCU-531 that could measure height up to 200 cm, respectively. All sensor values recorded were delivered to the microcontroller board to process body mass index and display on the LCD. Then these user data were to be kept in the database using a database management program. According to the comparison of tests with standard scales, body mass index scales measured weights and heights. The mean standard deviation was 0.029170, the mean standard error was 0.009224, and the mean percentage error was 0.18%. The mean accuracy was 99.82%. The test measures the height of the body mass index scales showed the values of the heights with the mean standard deviation of 0.773355, the mean standard error of 0.244556, the mean percentage error of 0.48%, and the mean accuracy of 99.52%. The experimental results of recording user data could utilize in the analysis of health care improvements.