Measurement scaling rack for determining human lower-limb axis

Abstract

The invention provides a measurement marking frame used for determining the axis line of the lower limbs of the human, belonging to the technical field of human motion research and human knee joint replacement. The measurement marking frame is characterized in that the measurement marking frame comprises an upper semi-circular bracket and a lower semi-circular bracket, a pair of connecting rods which consist of an upper connecting rod and a lower connecting rod which is sheathed inside the upper connecting rod in a slidable sleeve way; the upper semi-circular bracket and the lower semi-circular bracket are rotatablely connected with the connecting rods respectively by a shaft pin at the central position of the semi-ring; three axis line positioning pointers are distributed every 90 DEG on the upper semi-circular bracket and the lower semi-circular bracket; the tip of each pointer is contracted and locked in the needle hole and points at the center of the axis line of the lower limbs together; the upper semi-circular bracket and the lower semi-circular bracket can adjust the position of the circumferential direction respectively on knee joint and anklebone; furthermore, the centers of the two semi-circular brackets are coincident to the axis line of the limbs; marks which can be tracked by a sensor are uniformly distributed on the external circumference of the bracket. The measurement marking frame can precisely determine the relative position of the measurement system and the human body and the axis line of the lower limbs.

Description

technical field [0001] The invention relates to an auxiliary measurement device for determining the anatomical axis of the lower limbs of the human body, namely the axis measurement calibration frame of the lower limbs of the human body, which can be used by researchers in hospitals and research units to measure and define the axis of bones accurately in the three-dimensional motion research of the lower limbs of the human body. The invention belongs to the field of human motion research and human knee joint replacement surgery and calculates the relationship between it and the standard anatomical plane of the human body. Background technique [0002] In the study of human sports rehabilitation, human sports biomechanics and knee replacement, it is necessary to accurately measure the three-dimensional movement of the lower limbs of the human body. The axis has always been a difficult problem. At present, in the above-mentioned studies on human sports rehabilitation, human s...

AI Technical Summary

Problems solved by technology

[0007] It can be seen from the search that in the lower limb exercise test analysis research, there is still a lack of convenient and practical devices for effectively measuring and establishing the limb bone axis, which makes the test data of different test objects inconsistent and cannot be compared. The test is also difficult to repeat, which affects the accuracy of the test analysis

The reason is that the shape of the limbs is complex, and when the movement of the limbs is tracked by the marker sensor on the body surface, it is impossible to fix and repeatedly place the measurement markers

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