A Study of Measurement and Control of the Bolt Torque With Strain Guages and Pulse Width Modulation Techniques

• Main Authors: Hsuan-Jen Houng, 黃炫仁
• Other Authors: Mu-Jung Chen
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/38628024540902595683

碩士 === 明新科技大學 === 精密機電工程研究所 === 102 === This research is mainly to develop a measurement and control system for bolt torque. It uses pulse width modulation (PWM) technique to drive a DC motor and measures bolt torque magnitude with strain gauge. The tension of the bolt is then measured and controlled by quickly positioning process with the driving motor. Microchip PIC16F877 is used as the microprocessor of the system for measuring bolt torque. The uni-axial strain gauge is used in the system for sensing the bolt torque which can be displayed on an LCD display. It shows the tension condition for the bolt during the process. In order to enhance the processing speed of the bolt, the PWM technique is used to control the forward and reverse speeds of the motor for driving torque. It is achieved in this research to adjust the bolt torque to a preset value by applying the system with measuring deformation of strain gauge for the bolt torque and then control it with a motor.