CN114886413B - Human body bilateral pressure evaluation method and evaluation device - Google Patents

Abstract

The invention belongs to the technical field of medical appliances, and particularly relates to a human body bilateral pressure evaluation method and device, wherein the method comprises the following steps: step 1: acquiring detection information of a pressure sensor array; step 2: based on the acquired detection information, establishing a pressure gradient distribution map at each moment; step 3: based on the obtained detection information of the pressure sensor array, establishing a stress change curve graph of two sides of the human body, which changes along with time; step 4: acquiring an intersection point based on stress change graphs on two sides of a human body, and acquiring pressure corresponding to the intersection point and generating the moment of the intersection point; step 5: judging whether the intersection point is true or not based on the pressure gradient distribution diagram corresponding to the moment of generating the intersection point, if the intersection point is false, outputting an abnormal result, and proving that the two sides of the detector accept asymmetry.

Description

A method and device for evaluating human body bilateral pressure

technical field

The invention belongs to the technical field of medical devices, and in particular relates to an evaluation method and an evaluation device for bilateral pressure of a human body.

Background technique

At present, the incidence of sports injuries is gradually increasing, and the knee anterior cruciate ligament injury is one of the most common sports injuries. In the United States, the incidence of ACL injuries is about 1/3000, and the cost of surgery alone is as high as one billion dollars per year. Among professional athletes with ACL injury in my country, the incidence rate of the injury is 0.71% for women and 0.29% for men. ACL injury seriously affects human sports ability, and ACL injury cannot heal naturally, so arthroscopic reconstruction of ACL is the first choice in clinical practice.

However, the healing effect after ACL reconstruction is not satisfactory. Some studies have reported that the secondary injury rate of the ligament graft and the healthy ACL on the opposite side is as high as 10%, and the incidence of knee arthritis within 10-20 years after reconstruction is higher than 50%. . Many unrelated studies have reported that after ACL reconstruction, the kinematics and kinematic parameters of the lower limbs are asymmetrical not only in demanding functional tests, such as emergency stop jumping, side cutting, single-leg hopping, and squatting, but also asymmetry of kinematic parameters. Moreover, in the most important and basic running and jogging activities of the human body, there are also asymmetry problems in the kinematics and kinematic parameters of the lower limbs. Studies have shown that the main cause of secondary injury and knee osteoarthritis after ACL reconstruction is the asymmetry of the bearings of the lower limbs on both sides during the movement. After ACL reconstruction, patients usually show an asymmetric force pattern that reduces the weight of the affected leg. This asymmetric force pattern may be beneficial to the protection of the reconstructed ligament in the early postoperative period, but long-term force asymmetry will Reduces bone mineral density, thereby accelerating the occurrence of postoperative knee arthritis. And the reduction of load on the affected side will change the synthesis and catabolism of chondrocytes, change the biochemical composition of cartilage, reduce its structure and function, and accelerate the degenerative changes of cartilage.

Improving the force asymmetry after ACL reconstruction is a prerequisite for improving the rehabilitation effect after ACL reconstruction and preventing postoperative reinjury. Therefore, it is necessary to provide a method for detecting the force on both sides of the human body to provide a basis for subsequent treatment .

Contents of the invention

The invention provides a method and an evaluation device for evaluating the pressure on both sides of a human body, and intends to realize the detection of the force on both sides of the human body.

The technical scheme that the present invention adopts is as follows:

A method for assessing pressure on both sides of a human body, comprising the following steps:

Step 1: Obtain the detection information of the pressure sensor array;

Step 2: Based on the obtained detection information, establish a pressure gradient distribution map at each moment;

Step 3: Based on the obtained detection information of the pressure sensor array, establish a time-varying curve of force changes on both sides of the human body;

Step 4: Obtain the intersection point based on the force change curve on both sides of the human body, and obtain the pressure corresponding to the intersection point and the moment when the intersection point is generated;

Step 5: Based on the pressure gradient distribution diagram corresponding to the moment when the intersection point is generated, it is judged whether the intersection point is true, and if it is true, a normal result is output, and if it is false, an abnormal result is output.

The present invention judges whether the intersection generated by the force curve change graph is true based on the force change curve and the pressure gradient distribution graph. If it is false, it indicates that the patient's bilateral pressure is unevenly stressed; Treatment provides the foundational basis.

Preferably, said step 3 includes the following steps:

Step 3.1: Find the symmetry lines on both sides of the human body based on the contour of the pressure gradient distribution map;

Step 3.2: Divide the two sides of the human body based on the line of symmetry, and determine the detection information of the pressure sensor on the corresponding side based on the divided sides of the human body;

Step 3.3: Based on the detection information of the pressure sensor on the corresponding side determined in step 3.2, a time-varying curve of force on both sides of the human body is established.

Preferably, said step 5.1 includes the following steps:

Step 5.1: Based on the determined line of symmetry, make a plurality of indicating lines perpendicular to the line of symmetry;

Step 5.2: Determine the pressure value on the two points on the indicator line that are symmetrical to each other with the symmetry line;

Step 5.3: Find the symmetrical point with the largest difference on the indicator line, and compare it with the set threshold; if it is greater than the threshold, the intersection will be false, and an abnormal result will be output; if it is less than the threshold, the intersection will be true, and a normal result will be output .

Preferably, the setting method of the threshold is as follows:

Perform bilateral pressure tests on normal persons of different heights and weights, make multiple indicator lines perpendicular to the symmetry line based on the determined symmetry line, and determine the pressure values at two points on the indicator line that are symmetrical to each other with the symmetry line , and find the symmetrical point with the largest difference on the indicator line, and set its difference as the threshold.

An evaluation device for bilateral pressure of a human body, comprising an installation platform and a bearing platform mounted on the installation platform in a detachable installation manner, a pressure sensor array is installed between the installation platform and the bearing platform, and the pressure sensor The array is electrically connected with the controller, and the controller is connected with a power supply; the carrying platform is a cushion, and the pressure sensor array is a piezoelectric pressure sensor array.

In summary, owing to adopting above-mentioned technical scheme, the beneficial effect of the present invention is:

The present invention judges whether the intersection generated by the force curve change graph is true based on the force change curve and the pressure gradient distribution graph. If it is false, it indicates that the patient's bilateral pressure is unevenly stressed; Treatment provides the foundational basis. Moreover, the invention has simple structure and simple detection process, resulting in low cost and strong usability.

Description of drawings

The invention will be illustrated by way of example with reference to the accompanying drawings, in which:

Fig. 1 is a schematic block diagram of the process of the present invention.

Fig. 2 is a schematic diagram of the separation of the installation platform and the bearing platform of the present invention.

Description of reference signs: 1. Installation platform; 2. Pressure sensor array; 3. Bearing platform; 4. Controller.

Detailed ways

All features disclosed in this specification, or steps in all methods or processes disclosed, may be combined in any manner, except for mutually exclusive features and/or steps.

The present invention will be described in detail below in conjunction with FIG. 1 .

A method for assessing pressure on both sides of a human body, comprising the following steps:

Step 1: Obtain the detection information of the pressure sensor array 2;

Step 2: Based on the obtained detection information, establish a pressure gradient distribution map at each moment;

Step 3: Based on the obtained detection information of the pressure sensor array 2, establish a time-varying curve of force on both sides of the human body;

Described step 3 comprises the following steps:

Step 3.1: Find the symmetry lines on both sides of the human body based on the contour of the pressure gradient distribution map;

Step 3.2: Divide the two sides of the human body based on the line of symmetry, and determine the detection information of the pressure sensor on the corresponding side based on the divided sides of the human body;

Step 3.3: Based on the detection information of the pressure sensor on the corresponding side determined in step 3.2, a time-varying curve of force on both sides of the human body is established.

Step 4: Obtain the intersection point based on the force change curve on both sides of the human body, and obtain the pressure corresponding to the intersection point and the moment when the intersection point is generated;

Step 5: Based on the pressure gradient distribution diagram corresponding to the moment when the intersection point is generated, it is judged whether the intersection point is true, and if it is true, a normal result is output, and if it is false, an abnormal result is output.

Said step 5.1 comprises the following steps:

Step 5.1: Based on the determined line of symmetry, make a plurality of indicating lines perpendicular to the line of symmetry;

Step 5.2: Determine the pressure value on the two points on the indicator line that are symmetrical to each other with the symmetry line;

Step 5.3: Find the symmetrical point with the largest difference on the indicator line, and compare it with the set threshold; if it is greater than the threshold, the intersection will be false, and an abnormal result will be output; if it is less than the threshold, the intersection will be true, and a normal result will be output .

The method for setting the threshold is as follows:

Perform bilateral pressure tests on normal persons of different heights and weights, make multiple indicator lines perpendicular to the symmetry line based on the determined symmetry line, and determine the pressure values at two points on the indicator line that are symmetrical to each other with the symmetry line , and find the symmetrical point with the largest difference on the indicator line, and set its difference as the threshold.

The present invention judges whether the intersection generated by the force curve change graph is true based on the force change curve and the pressure gradient distribution graph, and if it is false, it indicates that the patient's bilateral pressure is asymmetrical; Treatment provides the foundational basis.

Referring to shown in accompanying drawing 2, a kind of evaluation device of human body bilateral pressure comprises installation platform 1 and the bearing platform 3 that is installed on described installation platform 1 by detachable installation mode, and described installation platform 1 and bearing platform 3 A pressure sensor array 2 is installed between them, the pressure sensor array 2 is electrically connected to the controller 4, and the controller 4 is connected to a power supply; the carrying platform 3 is a cushion, and the pressure sensor array 2 is a piezoelectric pressure sensor array.

When using the device, the user stands on the carrying platform 3 and tilts left and right; the pressure sensor array 2 detects the information of the whole process and transmits it to the controller, and the controller executes the evaluation method to achieve bilateral pressure symmetry detection.

The above-mentioned embodiments only express the specific implementation manners of the present application, and the descriptions thereof are relatively specific and detailed, but should not be construed as limiting the protection scope of the present application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the technical solution of the present application, and these all belong to the protection scope of the present application.

Claims (5)

1. A method for evaluating bilateral pressure of a human body, comprising the steps of:

step 1: acquiring detection information of the pressure sensor array (2);

step 2: based on the acquired detection information, establishing a pressure gradient distribution map at each moment;

step 3: based on the acquired detection information of the pressure sensor array (2), a stress change curve graph of two sides of the human body, which changes along with time, is established;

step 4: acquiring an intersection point based on stress change graphs on two sides of a human body, and acquiring pressure corresponding to the intersection point and generating the moment of the intersection point;

step 5: judging whether the intersection point is true based on a pressure gradient distribution diagram corresponding to the moment of generating the intersection point, outputting a normal result if true, and outputting an abnormal result if false.

2. The human body bilateral pressure assessment method according to claim 1, wherein the step 3 comprises the steps of:

step 3.1: finding symmetry lines on two sides of a human body based on the contour of the pressure gradient distribution map;

step 3.2: dividing two sides of a human body based on the symmetry line, and determining pressure sensor detection information of corresponding sides based on the divided two sides of the human body;

step 3.3: and (3) based on the detection information of the pressure sensors on the corresponding sides determined in the step (3.2), establishing a stress change curve graph of the two sides of the human body, which changes along with time.

3. The method for evaluating bilateral pressure of human body according to claim 2, wherein the step 5 comprises the steps of:

step 5.1: based on the determined symmetry line, making a plurality of indication lines perpendicular to the symmetry line;

step 5.2: determining pressure values at two points on the indication line which are symmetrical to each other with a symmetry line;

step 5.3: finding the symmetry point with the largest difference value on the indication line, and comparing the symmetry point with a set threshold value; if the cross point is larger than the threshold value, the cross point is false, an abnormal result is output, and if the cross point is smaller than the threshold value, the cross point is true, and a normal result is output.

4. A method for evaluating bilateral pressure of human body according to claim 3, wherein the method for setting the threshold is as follows: and carrying out double-side pressure tests on normal personnel with different heights and different weights, making a plurality of indication lines perpendicular to the symmetry lines based on the determined symmetry lines, determining pressure values on two points on the indication lines which are symmetrical to each other by the symmetry lines, finding a symmetry point with the largest difference value on the indication lines, and setting the difference value as the threshold value.

5. The human body bilateral pressure evaluation device is characterized by comprising a mounting platform (1) and a bearing platform (3) which is mounted on the mounting platform (1) in a detachable mounting mode, wherein a pressure sensor array (2) is mounted between the mounting platform (1) and the bearing platform (3), the pressure sensor array (2) is electrically connected with a controller (4), and the controller (4) is connected with a power supply; the bearing platform (3) is a soft cushion, the pressure sensor array (2) is a piezoelectric pressure sensor array, and the use of the evaluation device specifically comprises the following steps:

step 1: acquiring detection information of the pressure sensor array (2);

step 2: based on the acquired detection information, establishing a pressure gradient distribution map at each moment;

step 3: based on the acquired detection information of the pressure sensor array (2), a stress change curve graph of two sides of the human body, which changes along with time, is established;

step 4: acquiring an intersection point based on stress change graphs on two sides of a human body, and acquiring pressure corresponding to the intersection point and generating the moment of the intersection point;

step 5: judging whether the intersection point is true based on a pressure gradient distribution diagram corresponding to the moment of generating the intersection point, outputting a normal result if true, and outputting an abnormal result if false.

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