CN-114566278-B - Joint looseness grade evaluation system, method and device

CN114566278BCN 114566278 BCN114566278 BCN 114566278BCN-114566278-B

Abstract

The invention relates to the technical field of rehabilitation and medical treatment, and provides a joint looseness grade evaluation system, method and device. The joint looseness grade evaluation system comprises a pressure acquisition unit, a motion capture unit, a data synchronization unit and a visualization terminal, wherein the pressure acquisition unit is used for acquiring real-time voltage signals generated by a pressure sensor when the joint of a human body bears pressure, the motion capture unit is used for acquiring initial absolute coordinate data of a human body mark point before force application and real-time coordinate data in the force application process, the data synchronization unit is in communication connection with the pressure acquisition unit and the motion capture unit, the visualization terminal is in communication connection with the data synchronization unit, and the visualization terminal is used for comparing and evaluating the real-time voltage data, the initial absolute coordinate data and the real-time coordinate data with standard grade data after processing the real-time voltage data, the initial absolute coordinate data and the real-time coordinate data. The joint looseness grade evaluation system provided by the invention can objectively evaluate the joint looseness grade, and improves the control capability of a force applying person on force applying force.

Inventors

CHEN DU
CAI JING
FU LANLAN
MAO XU
YANG ZHIKAI

Assignees

中国农业大学

Dates

Publication Date: 20260505
Application Date: 20220214

Claims (8)

1. A joint loosening grade evaluation method, characterized by comprising: Acquiring real-time pressure data born by joints of a human body in the force application process; Acquiring first initial absolute coordinate data of rigid body marking points before application of force, second initial absolute coordinate data of rigid body marking points in the application process and first real-time coordinate data of rigid body marking points in the application process, acquiring origin points and base vectors of local coordinate systems of thighs and tibia before application of force based on the first initial absolute coordinate data, acquiring local coordinate data of the rigid body marking points in the local coordinate systems of the thighs and tibia based on the origin points, the base vectors and the second initial absolute coordinate data, and acquiring second real-time coordinate data of the rigid body marking points based on the local coordinate data and the first real-time coordinate data of the rigid body marking points in the application process, wherein the rigid body marking points are adhered to the outer sides of thighs and the outer sides of the lower legs, and the rigid body marking points are adhered to the bony positions; The method comprises the steps of respectively establishing local coordinate systems of a femur and a tibia in the process of applying force based on second real-time coordinate data of the osseous mark points, calculating a first rotation matrix and a first displacement of the local coordinate system of the tibia relative to the local coordinate system of the femur based on the local coordinate systems of the femur and the tibia in the process of applying force, calculating a second rotation matrix and a second displacement of the local coordinate system of the tibia relative to the local coordinate system of the femur based on the local coordinate systems of the femur and the tibia before applying force, calculating a first equivalent rotation angle of the tibia relative to the femur and a second equivalent rotation angle of the tibia relative to the femur based on the first rotation matrix and the second rotation matrix, calculating an angle change value of the tibia relative to the femur based on the second equivalent rotation angle, and calculating a displacement change value of the tibia relative to the femur based on the second displacement; And comparing and evaluating the real-time pressure data, the displacement change value and the angle change value with standard grade data.
2. A joint loosening grade evaluation system that performs the joint loosening grade evaluation method of claim 1, comprising: The pressure acquisition unit is used for acquiring real-time voltage signals generated by the pressure sensor when the joint of the human body bears pressure; The motion capture unit is used for collecting initial absolute coordinate data of the human body mark points before force application and real-time coordinate data in the force application process; the data synchronization unit is in communication connection with the pressure acquisition unit and the motion capture unit; The visual terminal is in communication connection with the pressure acquisition unit and the data synchronization unit, and is used for processing the real-time voltage signal, the initial absolute coordinate and the real-time coordinate data and then comparing and evaluating the processed real-time voltage signal, the initial absolute coordinate and the real-time coordinate data with standard grade data.
3. The joint loosening grade evaluation system of claim 2, wherein the pressure acquisition unit comprises: The pressure sensors are adhered to joints of a human body; The signal conditioning module is used for converting the resistance signal output by the pressure sensor into a voltage signal and transmitting the voltage signal to the data acquisition module; the data acquisition module is in communication connection with the data synchronization unit and the visual terminal.
4. The joint loosening grade evaluation system of claim 3, wherein the pressure sensor is a membrane pressure sensor.
5. The joint loosening grade evaluation system of claim 3, wherein the motion capture unit comprises: a plurality of marking points, wherein the marking points are adhered to the lower limbs of the human body; the image acquisition module is used for acquiring initial absolute coordinate data of the mark point before force application and real-time coordinate data in the force application process, and is in communication connection with the data synchronization unit.
6. The joint loosening class evaluation system as claimed in claim 5, wherein the plurality of marker points includes a plurality of rigid body marker points and a plurality of osseous marker points.
7. The joint loosening class evaluation system of claim 5, wherein the data synchronization unit comprises: the synchronizer is electrically connected with the data acquisition module and the image acquisition module; The data switch is electrically connected with the synchronizer, the image acquisition module and the visual terminal.
8. A joint loosening grade evaluation device, comprising: The acquisition module is used for acquiring real-time pressure data born by a joint of a human body in the force application process, first initial absolute coordinate data of a rigid body mark point before force application, second initial absolute coordinate data of a bone mark point and first real-time coordinate data of the rigid body mark point in the force application process, wherein the rigid body mark point is stuck on the outer side of a thigh and the outer side of a shank, and the bone mark point is stuck on a bone position; The calculation module is used for obtaining an origin and a base vector of a local coordinate system of a femur and a tibia before application of force based on the first initial absolute coordinate data, obtaining local coordinate data of a local coordinate system of the femur and the tibia of the bone mark point based on the origin, the base vector and the second initial absolute coordinate data, obtaining second real-time coordinate data of the bone mark point based on the local coordinate data and the first real-time coordinate data of a rigid body mark point in the application process, respectively establishing local coordinate systems of the femur and the tibia in the application process based on the second real-time coordinate data of the bone mark point, calculating a first rotation matrix and a first displacement of the local coordinate system of the tibia relative to the local coordinate system of the femur based on the local coordinate systems of the femur and the tibia in the application process, calculating a second rotation matrix and a second displacement of the local coordinate system of the tibia relative to the local coordinate system of the femur based on the local coordinate system of the femur before application of force, calculating a first equivalent rotation angle relative to the first rotation matrix and a second equivalent rotation angle of the bone mark point in the application process and a second equivalent rotation angle relative to the femur in the application process; And the comparison module is used for comparing and evaluating the real-time pressure data, the displacement change value and the angle change value with standard grade data.

Description

Joint looseness grade evaluation system, method and device Technical Field The invention relates to the technical field of rehabilitation, in particular to a joint loosening grade evaluation system, a joint loosening grade evaluation method and a joint loosening grade evaluation device. Background When the force is applied to the joints of the human body, the joint looseness is classified into four stages according to Maitland classification standards. During the application of force, both the femur and tibia produce weak position changes, the magnitude of which are related to the level of skill of the application of force, the higher the level, the greater the relative change. In the actual force application process, the force application force is difficult to describe in language, and the position change of the tibia and the femur is also difficult to visually observe. Disclosure of Invention The invention provides a joint loosening grade evaluation system, a joint loosening grade evaluation method and a joint loosening grade evaluation device, which are used for solving the defect that the grade of joint loosening cannot be objectively evaluated in the force application process in the prior art. The invention provides a joint looseness grade evaluation system which comprises a pressure acquisition unit, a motion capture unit, a data synchronization unit and a visualization terminal, wherein the pressure acquisition unit is used for acquiring real-time voltage signals generated by a pressure sensor when a joint of a human body bears pressure, the motion capture unit is used for acquiring initial absolute coordinate data of a mark point of the human body before force application and real-time coordinate data in the force application process, the data synchronization unit is in communication connection with the pressure acquisition unit and the motion capture unit, the visualization terminal is in communication connection with the pressure acquisition unit and the data synchronization unit, and the visualization terminal is used for comparing and evaluating the real-time voltage data, the initial absolute coordinate data and the real-time coordinate data with standard grade data after processing. The joint looseness level evaluation system comprises a plurality of pressure sensors, a signal conditioning module and a data acquisition module, wherein the pressure sensors are adhered to joints of a human body, the signal conditioning module is used for converting resistance signals output by the pressure sensors into voltage signals and transmitting the voltage signals to the data acquisition module, and the data acquisition module is in communication connection with the data synchronization unit and the visual terminal. According to the joint looseness grade evaluation system provided by the invention, the pressure sensor is a film type pressure sensor. The joint looseness grade evaluation system comprises a plurality of marking points and an image acquisition module, wherein the marking points are adhered to lower limbs of a human body, the image acquisition module is used for acquiring initial absolute coordinate data of the marking points before force application and real-time coordinate data in the force application process, and the image acquisition module is in communication connection with the data synchronization unit. The joint looseness grade evaluation system comprises a plurality of rigid body marking points and a plurality of osseous marking points, wherein the rigid body marking points are adhered to the outer sides of thighs and the outer sides of calves, and the osseous marking points are adhered to osseous positions. The joint looseness level evaluation system comprises a synchronizer, a data switch and a visual terminal, wherein the synchronizer is electrically connected with the data acquisition module and the image acquisition module, and the data switch is electrically connected with the synchronizer, the image acquisition module and the visual terminal. The invention further provides a joint looseness grade evaluation method, which comprises the steps of obtaining real-time pressure data born by a human joint in the force application process, obtaining first initial absolute coordinate data of a rigid body mark point before force application, second initial absolute coordinate data of a bone mark point and first real-time coordinate data of the rigid body mark point in the force application process, obtaining second real-time coordinate data of the bone mark point based on the first initial absolute coordinate data, the second initial absolute coordinate data and the first real-time coordinate data, calculating displacement change values and angle change values of the joint in the force application process, and comparing and evaluating the real-time pressure data, the displacement change values and the angle change values with standard grade data. According to the joint looseness grade e