Developing an In-expensive Device for Measuring the Pressure of Children's Soles

Document Type : Original Article


1 Faculty of Science and Medical Technologies, Islamic Azad University, Science and Research Branch of Tehran, Tehran, Iran.

2 Department of Biomedical Engineering, Faculty of Medical Sciences and Technologies, Islamic Azad University Science and Research Branch, Tehran, Iran,

3 Department of Mathematics, Faculty of Basic Sciences, Yadegar-e-Imam Khomeini (RAH) Shahre Rey Branch, Islamic Azad University, Tehran, Iran.



Walking is one of the most necessary and important movements among humans, especially children. Walking problems can have serious consequences for children at an older age. In this paper, a system is developed that can show the pressure on the soles of children's feet. With this device, children's walking problems can be solved to a high extent. First, the weight sensor information is amplified with the help of an op-amp, and then it is read through an analog-to-digital converter, and with the help of this analog-to-digital converter, it is digitized. As it turns out, sensors have to translate information into machine language in order to transmit information, which can be done with the help of an analog-to-digital converter. After the micro converts this data to digital, the system is then calibrated and the calibrated data is sent to the computer via the UART protocol using a TTL to USB converter. This data is displayed on the computer for further review.