Human joint angle measuring system oriented to wearable flexible sensor

Abstract

The invention belongs to the field of human joint angles, and discloses a human joint angle measuring system oriented to a wearable flexible sensor. The measuring system comprises a measuring module,a main control circuit module, a signal transmitting module and an upper computer. The measuring module comprises a plurality of parallel sub-channels. Each sub-channel comprises a flexible sensor anda measuring circuit connected with the flexible sensor. Each flexible sensor is attached to a to-be-detected human joint. Each measuring circuit measures the variation amount of capacitance in the corresponding flexible sensor. The signal transmitting module is used for conducting analog-digital conversion on the variation amounts of the capacitance measured by the sub-channels in the measuring module and transmitting the variation amounts to the main control circuit module. The main control circuit module packages digital signals from the signal transmitting module and transmits the packagedsignals to the upper computer. The upper computer receives the digital signals and calculates the angle variation of the to-be-detected human joint. Through the human joint angle measuring system, the portable, accurate and stable human joint angle measurement is realized, and the human joint angle measuring system is suitable for various outdoor and underwater severe environments and the like.

Description

technical field [0001] The invention belongs to the field of human body joint angles, and more particularly relates to a human body joint angle measurement system for wearable flexible sensors. Background technique [0002] The measurement of human joint angles has important applications in the fields of medical treatment, military, security, and film production. Using measurement systems to accurately and conveniently obtain joint angle-related parameters during human motion has become a research hotspot in recent years. At present, in the field of human joint angle measurement, the most widely used is the passive capture device based on the optical tracking method, such as the Vicon motion capture system. However, this type of system has high requirements for the use environment, is complicated to use, cannot achieve portable effects, and has self-shielding problems, and data is easily lost, resulting in a large amount of subsequent data loss; in the IMU-based measurement ...

AI Technical Summary

Problems solved by technology

However, this type of system has high requirements for the use environment, is complicated to use, cannot achieve portable effects, and has self-shielding problems, and data is easily lost, resulting in a large amount of subsequent data loss; in the IMU-based measurement system, the measurement signal is easy to drift , resulting in a large cumulative error; the sEMG-based measurement system collects the electrical signal of the human skin surface, but the measurement signal is weak, and the anti-interference performance is particularly poor; the mechanical wearable device is large in size and heavy in weight, which hinders the movement of the subject. Therefore, designing a portable, accurate and stable wearable motion measurement system has scientific research and market value

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