Ankle type step counter based on single-shaft micro-mechanical accelerometer

Abstract

The invention relates to an ankle type step counter based on a single-shaft micro-mechanical accelerometer, belonging to the technical field of detection of human motion information. The ankle type step counter comprises a shell, a circuit board, a single-shaft acceleration sensor, a Bluetooth module and a Bluetooth antenna, wherein the shell is worn on an ankle by virtue of an ankle strip, the circuit board is fixed on the shell, and electronic components including the single-shaft acceleration sensor, the Bluetooth module and the Bluetooth antenna are fixed on the circuit board; and a signal output end of the single-shaft acceleration sensor is connected with a signal input end of a single chip microcomputer in the Bluetooth module, and a radio-frequency signal output end of the Bluetooth module is connected with a signal input end of the Bluetooth antenna. According to the ankle type step counter, the step is counted by directly detecting the impacting number of times between the sole of a foot and the ground, the single-shaft acceleration sensor approaches a vibration source, and then the attenuation of a human body to the vibration of the sole of the foot is substantially reduced, so that the detection sensitivity is improved, and the anti-interference capacity is relatively strong.

Description

technical field [0001] The invention relates to an ankle-type pedometer based on a single-axis micromechanical accelerometer, which belongs to the technical field of human motion information detection. Background technique [0002] As a portable motion detection device, the pedometer can quantify and monitor people's daily walking steps, provide a standard for reference and comparison, and promote people to formulate reasonable exercise planning and achieve the goal of moderate exercise. more and more widely used. [0003] When the human body is walking, the intermittent impact between the soles of the feet and the ground will cause the center of gravity of the body to vibrate up and down synchronously with the walking frequency in a direction perpendicular to the ground. Using the vibration sensor to detect the up and down movement of the center of gravity of the body, the number of walking steps can be calculated. count. Existing smart electronic devices use 3-axis Micro...

AI Technical Summary

Problems solved by technology

[0006] (2) The calculation method is complicated. First, the acceleration in the up and down directions must be calculated according to the detection signals of the MEMS accelerometer in three directions, and then a certain algorithm is used to separate the number of walking steps from the fluctuation signal of the center of gravity of the human body;

[0007] (3) The structure of the 3-axis MEMS micromachined accelerometer is complex and the cost is high

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