Gait measurement system and method using multiple lidars at different heights

A gait measurement method using multiple LiDARs at different heights to measure a gait of a measurement subject (10) walking on a walking path (110), the gait measurement method comprising the steps, each performed by a gait measurement system (100) including the walking path (110) for the measurement subject (10) to walk, a LiDAR sensor device (120) installed at a side of the walking path (110) and configured to scan a direction of the walking path (110), and a gait analysis part (130) configured to use signals detected by the LiDAR sensor device (120) to analyze the gait of the measurement subject (10) walking on the walking path (110), of:

• (1) collecting scanning data obtained by the LiDAR sensor device (120) scanning the walking path (110) on which the measurement subject (10) is walking, wherein first scanning data is collected by a first LiDAR sensor (121) scanning, on a floor at the side of the walking path (110), a plane at foot height of the measurement subject (10) walking on the walking path (110), second scanning data is collected by a second LiDAR sensor (122) scanning, at the side of the walking path (110), a plane at knee height of the measurement subject (10) walking on the walking path (110), and third scanning data is collected by a third LiDAR sensor (123) scanning, at the side of the walking path (110), a plane at torso height of the measurement subject (10) walking on the walking path (110);
• (2) analyzing the first scanning data to specify foot positions of the measurement subject (10), analyzing the second scanning data to specify knee positions of the measurement subject (10), and analyzing the third scanning data to specify a torso position of the measurement subject (10);
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• (3) combining the specified foot positions, knee positions, and torso position of the measurement subject (10) to analyze at least one selected from a group of body distortion and gait instability while the measurement subject (10) is walking.