With the increasingly perfect functions of smart mobile terminals, mobile terminal devices have become an indispensable part of people's lives. Therefore, based on the existing mobile terminal equipment, the development of fitness detection applications can provide more convenience for people's lives. This article aims to study the method of measuring the number of pull-up times of a mobile terminal with a built-in acceleration sensor. This paper uses a 3-axis acceleration sensor of the mobile terminal as a measurement device. By analyzing the acceleration of each axis of the cycle-type repetitive motion of the pull-up, The value is transformed, the collected sensor data is processed and analyzed, then the motion is matched, and the pull-up movement is counted. By analyzing the periodic repetitive motion of the pull-up, the transformation of the acceleration value of each axis of the sensor is analyzed. The collected sensor data is processed and analyzed by a mobile terminal, such as a mobile phone, and then motion matching is performed to count the pull-up motion. Validate the mobile terminal through actual experiments and collect experimental data. The experimental data show that the method of measuring the number of pullup times of the mobile terminal with a built-in acceleration sensor meets the actual requirements, and the calculation accuracy is improved by 65.2%. Experimental data show that under the development of mobile Internet, the method of measuring pullup times of mobile terminals with built-in acceleration sensors can meet the needs of users to count their exercise times anytime, anywhere. It is statistically efficient, convenient and economical. In terms of time, it saves about 35% of the time compared with traditional calculation and statistical methods.
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