Bow angle detection method based on CSI signal intensity in wifi

A technology of angle detection and signal strength, applied in the field of computer vision, can solve problems such as bowing the head, and achieve the effects of convenient experimentation, easy deployment, and simple system

Inactive Publication Date: 2019-03-29
XIAN UNIV OF TECH
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Problems solved by technology

[0003] In order to overcome the deficiencies of the above-mentioned prior art, the purpose of the present invention is to provide a head-down angle detection method based on wifi-base...

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  • Bow angle detection method based on CSI signal intensity in wifi

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Embodiment Construction

[0024] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0025] The present invention proposes a CSI sitting posture detection method based on wifi. The basic principle is: different human body movements can cause different CSI signal change patterns, and the observed signal change patterns can be mapped to different human body movements to be detected. identified in real time.

[0026] In order to use the wifi signal to automatically detect the sitting posture method in real time in the actual environment, the following four problems need to be solved: 1) how does the CSI in the wifi signal flow reflect the sitting posture movement, and how to determine the head angle or waist angle in the sitting posture; 2) the sitting posture is related to Do body part angles use their exact values ​​or ranges? 3) For a complex actual environment, how to automatically and accurately recognize the head-down act...

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Abstract

The invention discloses a bow angle detection method based on CSI signal intensity in wifi. The method comprises the following steps: step one, configuring an AP and MP; constructing an experimental environment; preparing a commercial normal wireless network card driver, and a wifi router supporting 802.11n or above protocol; and configuring a CSI environment; step two, collecting data; and step three, processing the data; extracting a feature value reflecting a bow action by analyzing and processing channel state information CSI, and establishing a harmonic model; and finally classifying thebow angle action by utilizing a classifier, identifying and correcting the sitting posture, and realizing synchronous adjusting of the waist and cervical vertebra of the user; and reflecting the waistbending degree through the bow angle. The method disclosed by the invention is simple, free from carrying any sensor equipment and high in real time.

Description

technical field [0001] The invention belongs to the field of computer vision, and in particular relates to a head-down angle detection method based on CSI signal strength in wifi. Background technique [0002] Computers have become an indispensable learning and communication tool in daily life and work. Improper posture can cause health problems such as cervical spine and lumbar spine. For the problem of computer posture, the existing detection methods are mainly based on computer vision, sensors, etc., these methods require additional equipment support, and the system cost is high; and the method based on computer vision needs to extract the information of various parts of the human body in the image, which is not conducive to Protect the personal privacy of the monitored person. Contents of the invention [0003] In order to overcome the deficiencies of the above-mentioned prior art, the purpose of the present invention is to provide a head-down angle detection method b...

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Application Information

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IPC IPC(8): H04B17/309H04L1/06
CPCH04B17/309H04L1/0693
Inventor 张发存张妍李军怀王怀军于蕾
Owner XIAN UNIV OF TECH
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