- 學位論文
多點足底壓力感測器結合藍芽通訊之設計與應用
Design and Application of Multi Point Plantar Pressure Sensor Combined with Bluetooth
摘要
利用上下電極設計成電容式壓力感測器，感測器本身可以測量壓力大小。由於感測器製造有些微的誤差，必須由校準機台校準感測器。校準機台使用氣壓校準方式，因為感測器在同一壓力下有些微誤差，需要將每顆感測器校準到一致，所以校準完成後都會有校準表給程式方面做運算修正，因此製作一套自動化校準系統。 在電路設計方面，當感測器放置於鞋墊底部，使用陣列式的布線去掃描足底的感測器，當鞋底接觸到地面時，感測器內感測單元接收到不同的壓力，再用電路產生充放電計算電容值。經由微處理器將類比訊號轉換成數位訊號，依照不同電容值大小計算出壓力值並儲存在微處理機中。再利用藍芽模組透過無線傳輸的方式傳輸到手機或電腦。 在校準機台自動化方面，使用Arduino控制板來調整氣壓大小，以電腦寫成的人機介面做操控，一方面可以自動校準感測器，一方面可以將校準值建表做儲存。校準表也可以做為數據分析，因為人機介面也可以儲存成Excel檔做數值曲線分析，在內文中將會提供完整的設計流程及實驗數據。
並列摘要
Designed to form upper and lower electrodes of capacitive pressure sensors , pressure sensors mainly to measure the value. Since a slight error in the manufacture sensors, the sensor must be calibrated by the calibration machine. Calibration machine use calibration methods, because a slight error in the sensor under the same pressure, requiring every single sensor calibrated to the same. After calibration is complete, there will be a calibration table to the program has done calculations, therefore production of an automated calibration system. In the design of the circuit, when the sensor is placed at the bottom of the insole, circuit wiring array to scan the foot sensor, when the sole contact the land surface, the sensing unit within the sensor receives a different pressure, and then generated by the charge/discharge circuit capacitance values calculated. Through microprocessor converts the analog signals into digital signals, according to different capacitance values calculated pressure value and stored in the microprocessor. Finally, the Bluetooth module is transferred to the phone or computer via wireless transmission. During the calibration machine automation, use the Arduino for control panel to adjust the air pressure value then operate in human interface, in addition to automatic calibration sensor can also be done to save the calibration values in the table. Calibration table can also be used as data analysis, because human interface can also be saved as an Excel file in order to do the numerical curve analysis.