The Design and Application of Plantar Pressure Sensor Combined with Bluetooth

• Main Authors: Sheng-Bin Chen, 陳聖彬
• Other Authors: 黃榮堂
• Format: Others
• Language: zh-TW
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/e57pfd

碩士 === 國立臺北科技大學 === 機電整合研究所 === 100 === In this research we developed a low cost, low power consumption and easier to use foot pressure sensing system. Plantar pressure values at diffierent locations could calculate the varying center of gravity position to derive user’s walking posture and using it to make foot orthoses such as insole or cushion thereby alleviating the damage caused by the user due to bad walking posture attitude. The plantar pressure sensor array is placed on the bottom of the insole and scanned 16 times per second. Let users wear with plantar pressure sensors; once the soles touch the ground, different pressure exerts on the sensor unit which would allow the circuit to generate a DC voltage. Then the microcontroller converts the analog signal into digital signal and computes the data into pressure value. Further use the Bluetooth module to transmit the pressure value wirelessly to a mobile phone or computer. When cellphone or PC got and stored the data, the display would show the real-time data as a different color cooresponding to the pressure value for each sensing unit. In other application the values and locations of the 16 sensing units are calculated to obtain the user’s center of gravity and display as a red star such that the trajectory movement of the user''s center of gravity could be observed. Cellphone can also send the data to the cloud after getting data from the sensor. By using the database on the cloud it could analyze the locus of the center of the gravity and passed the results to cellphone.