Muscle power detection device and method for muscle power classification

A muscle power detection device configured to detect muscle power of a subject, the muscle power detection device comprising:

• a first inertia measurement unit (IMU) sensor configured to be arranged at a first part of the subject and to obtain first inertial data corresponding to the first part of the subject according to a movement status of the first part of the subject;
• a second IMU sensor configured to be arranged at a second part of the subject and to obtain second inertial data corresponding to the second part of the subject according to a movement status of the second part of the subject, wherein the first part of the subject and the second part of the subject are substantially different;
• a pressure detector configured to detect external force applied on the first part of the subject or the second part of the subject to obtain pressure data;
• and
• a processor configured to perform an operation on the first inertial data, the second inertial data and the pressure data for obtaining an evaluation value and to obtain muscle power grading information corresponding to the first part of the subject and the second part of the subject according to the evaluation value, wherein the muscle power grading information comprises Medical Research Council (MRC) muscle power grade information, and wherein the evaluation value includes an angle, a velocity, an angle variation, a velocity variation, or combinations thereof;
• wherein if the angles respectively corresponding to the first part and the second part are all less than an angular threshold and the velocities respectively corresponding to the first part and the second part are all close to 0, then the processor determines that an MRC muscle power grade of the MRC muscle power grade information is 0;
• if the angles respectively corresponding to the first part and the second part are all greater than the angular threshold but less than about 90 degrees, then the processor determines that the MRC muscle power grade is 1;
• if the angles respectively corresponding to the first part and the second part are all about but does not substantially exceed 90 degrees, then the processor determines that the MRC muscle power grade is 2;
• if the velocity corresponding to the first part is greater than a first velocity threshold, the velocity corresponding to the second part is greater than a second velocity threshold, a variation quantity of the angle corresponding to the first part is greater than an first angular variation threshold, and a variation quantity of the angle corresponding to the second part is greater than a second angular variation threshold, then the processor determines that the MRC muscle power grade is 3;
• if the velocity corresponding to the first part is between 0 and the first velocity threshold, the velocity corresponding to the second part is greater than is between 0 and the second velocity threshold, the variation quantity of the angle corresponding to the first part is between 0 and the first angular variation threshold, and the variation quantity of the angle corresponding to the second part is between 0 and the second angular variation threshold, then the processor determines that the MRC muscle power grade is 4;
• if the velocities respectively corresponding to the first part and the second part are all substantially 0 and the variation quantities of the angles respectively corresponding to the first part and the second part are all substantially 0, the processor determines that the MRC muscle power grade is 5;
• wherein the angular threshold is in a range from 0 to 5 degrees, and the first velocity threshold, the second velocity threshold, the first angular variation threshold and the second angular variation threshold are all greater than 0.

A muscle power detection method for detecting muscle power of a subject, the muscle power detection method comprises:

• arranging at least one inertia measurement unit (IMU) unit sensor at at least one part of the subject to obtain inertial data corresponding to the at least one part of the subject according to a movement status of the at least one part of the subject;
• arranging a pressure detector on one of the at least one part of the subject to detect external force applied on the one of the at least one part of the subject to obtain pressure data;
• and
• performing an operation on the inertial data and the pressure data to obtain an evaluation value and to obtain muscle power grading information corresponding to the at least one part of the subject according to the evaluation value, wherein the muscle power grading information comprises Medical Research Council (MRC) muscle power grade information, and wherein the evaluation value includes an angle, a velocity, an angle variation, a velocity variation, or combinations thereof;
• wherein if the angle is less than an angular threshold and the velocity is close to 0, then an MRC muscle power grade of the MRC muscle power grade information is determined to be 0;
• if the angle is greater than the angular threshold but less than about 90 degrees, then the MRC muscle power grade is determined to be 1;
• if the angle is about but does not substantially exceed 90 degrees, then the MRC muscle power grade is determined to be 2;
• if the velocity is greater than a velocity threshold and a variation quantity of the angle is greater than an angular variation threshold, then the MRC muscle power grade is determined to be 3;
• if the velocity is between 0 and the velocity threshold and the variation quantity of the angle is between 0 and the angular variation threshold, then the MRC muscle power grade is determined to be 4;
• if the velocity is substantially 0 and the variation quantity of the angle is substantially 0, then the MRC muscle power grade is determined to be 5;
• wherein the angular threshold is in a range from 0 to 5 degrees, and the velocity threshold and the angular variation threshold are all greater than 0.