Disability evaluation test method for blunt impact

Abstract

The invention discloses a disability evaluation test method for blunt impact, and belongs to the technical field of disability test methods, and the method specifically comprises the following steps: S1, obtaining physical index data of blunt impact equipment; s2, acquiring physical change data and biological target behavior data of the impact position through behavior acquisition equipment, and respectively calculating a blunt impact energy value and an anti-disability attribute characteristic value; s3, acquiring injury condition data of the biological target, and acquiring injury disability attribute characteristics; and S4, evaluating the disability level of the biological target through the anti-disability attribute feature value and the damage disability attribute feature. By adopting the disability evaluation test method for the blunt impact, evaluation is performed by adopting two disability indexes, meanwhile, lung ventilation is collected in a non-contact manner, data are acquired by adopting an existing infrared motion trapper, and respiratory function evaluation is completed on biological targets which cannot be matched under unconstrained and non-contact conditions.

Description

Technical Field

[0001] The present invention relates to the technical field of disability testing methods, and in particular to a disability assessment testing method for blunt impact. Background Art

[0002] Assess the degree of disability caused by blunt force impact, and provide a reference for the development of relevant protective equipment, the formulation of safety standards, and forensic identification. The existing technology uses mechanical sensors and image acquisition equipment to perform disability assessment. For example, the patent with publication number CN116242208A discloses a non-lethal kinetic projectile impact damage effect assessment test device and evaluation test method. The corresponding instantaneous impact force is obtained through a pressure sensor, and the contact area of ​​the non-lethal kinetic projectile with the rigid target plate during the impact process is obtained through high-speed photography of the camera, and then the instantaneous average stress is obtained, thereby realizing the testing and evaluation of non-lethal kinetic projectile impact damage and skin penetration damage. However, the following problems still exist:

[0003] (1) The assessment data used is single and cannot effectively assess the degree of disability comprehensively.

[0004] (2) A rigid target is used as a fixed target, and the physiological data of the corresponding biological target cannot be obtained. The existing technology uses a ventilator to monitor the lung ventilation volume of the biological target, which is large in size, inconvenient to fix, and has high cost. Summary of the Invention

[0005] The purpose of the present invention is to provide a disability assessment test method for blunt impact to solve the above technical problems.

[0006] To achieve the above objectives, the present invention provides a method for blunt impact disability assessment testing, the specific steps of which are as follows:

[0007] Step S1: obtaining physical index data of a blunt impact device;

[0008] Step S2: Acquiring physiological indicator data of the biological target collected by the physiological signal acquisition device during the blunt impact process for monitoring the biological target;

[0009] At the same time, the behavior acquisition equipment collects the physical change data of the impact position and the biological target behavior data, and calculates the blunt impact energy value and the anti-disability attribute characteristic value respectively;

[0010] Step S3: Obtaining injury data of the biological target and obtaining injury disability attribute characteristics;

[0011] Step S4: Assess the disability level of the biological target by using the resistance disability attribute characteristic value and the damage disability attribute characteristic to obtain the blunt impact disability level assessment result under the corresponding physical indicator data and blunt impact energy value.

[0012] Preferably, the physical indicator data is collected by infrared optical motion capture equipment and high-speed photography equipment, and the physical indicator data includes the displacement and speed of the launched projectile.

[0013] Preferably, the physiological signal acquisition device is a wearable monitoring device, which collects biological target physiological indicator data, including electrocardiogram, blood pressure, blood oxygen, respiratory rate and end-tidal carbon dioxide value, for monitoring the status of the biological target.

[0014] Preferably, the behavior acquisition device includes an infrared motion capturer and a video recorder, the infrared motion capturer is used to capture reflective marking points attached to the biological target and the back of the projectile;

[0015] The formula for calculating blunt impact energy value is as follows:

[0016]

[0017] Where VC is the physical change disability characteristic value, v(t) is the deformation rate of the impacted part of the chest, and C(t) is the ratio of the chest deformation D(t) to the initial chest volume D0. is the differential of D(t) with respect to t.

[0018] Preferably, the biological target behavior data includes respiratory biomechanics data and behavioral change data;

[0019] Respiratory biomechanics data includes lung ventilation, which is calculated by the change in reflective marker points captured by the infrared motion capture device. The calculation formula is as follows:

[0020]

[0021] Where V is the chest volume, v i is the volume of the tetrahedron divided in the ith part, n is the number of tetrahedrons, det[] is the determinant of the matrix, x i,1 、y i,1 and z i,1 are the three-dimensional coordinate values ​​of the first vertex of the tetrahedron, x i,2 、y i,2 and z i,2 are the three-dimensional coordinate values ​​of the second vertex of the tetrahedron, x i,3 、y i,3 and z i,3 They are the three-dimensional coordinate values ​​of the third vertex of the tetrahedron, x i,4 、y i,4 and z i,4are the three-dimensional coordinate values ​​of the fourth vertex of the tetrahedron respectively; the lung ventilation is represented by the chest volume change value, and the anti-disability attribute characteristic value is obtained according to the lung ventilation curve after blunt impact.

[0022] Preferably, in step S4, the specific evaluation expression is as follows:

[0023]

[0024] Among them, Z represents the disability level, X i Represents the characteristic value of the resistance disability attribute, where i = 0, 1, 2; Y i Represented as damage disability attribute characteristics, where i = 0, 1, 2.

[0025] Therefore, the present invention adopts the above-mentioned disability assessment test method for blunt impact, which has the following beneficial effects:

[0026] (1) The disability level of biological targets is assessed by using the characteristic values ​​of the resistance disability attribute and the damage disability attribute characteristics to improve the accuracy and comprehensiveness of the assessment.

[0027] (2) At the same time, lung ventilation is collected in a non-contact manner, and the existing infrared motion capture device is used to obtain data, so as to complete the respiratory function assessment of the biological target that cannot cooperate under unconstrained and non-contact conditions.

[0028] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 The present invention is a flowchart of a disability assessment test method for blunt impact. DETAILED DESCRIPTION

[0030] In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or the orientations or positional relationships in which the inventive product is usually placed when in use. These are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention. In the description of the present invention, it should also be noted that, unless otherwise expressly specified and limited, the terms "setting", "installation" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be a communication between the internal parts of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0032] like Figure 1 As shown in FIG, a test method for disability assessment for blunt impact, the specific steps are as follows:

[0033] Step S1: Obtaining physical index data of a blunt impact device by using an infrared optical motion capture device and a high-speed photography device to collect the physical index data, wherein the physical index data includes the displacement and speed of the launched projectile.

[0034] Step S2: Acquire the physiological indicator data of the biological target collected by the physiological signal acquisition device during the blunt impact process for monitoring the biological target. The physiological signal acquisition device is a wearable monitoring device. The wearable monitoring device collects the physiological indicator data of the biological target. The biological target physiological indicator data includes electrocardiogram, blood pressure, blood oxygen, respiratory rate and end-tidal carbon dioxide value, which are used to monitor the status of the biological target.

[0035] At the same time, behavioral acquisition equipment collects physical change data at the impact location and biological target behavioral data, and calculates blunt impact energy values ​​and counter-incapacitating attribute characteristic values. The behavioral acquisition equipment includes an infrared motion capture device and a video recorder. The infrared motion capture device is used to capture reflective markers attached to the biological target and the back of the projectile.

[0036] The formula for calculating blunt impact energy value is as follows:

[0037]

[0038] Where VC is the physical change disability characteristic value, v(t) is the deformation rate of the impacted part of the chest, and C(t) is the ratio of the chest deformation D(t) to the initial chest volume D0. is the differential of D(t) with respect to t.

[0039] Biological target behavioral data include respiratory biomechanics data and behavioral change data;

[0040] Respiratory biomechanics data includes lung ventilation, which is calculated by the change in reflective marker points captured by the infrared motion capture device. The calculation formula is as follows:

[0041]

[0042] Where V is the chest volume, v i is the volume of the tetrahedron divided in the ith part, n is the number of tetrahedrons, det[] is the determinant of the matrix, x i,1 、y i,1 and z i,1are the three-dimensional coordinate values ​​of the first vertex of the tetrahedron, x i,2 、y i,2 and z i,2 are the three-dimensional coordinate values ​​of the second vertex of the tetrahedron, x i,3 、y i,3 and z i,3 They are the three-dimensional coordinate values ​​of the third vertex of the tetrahedron, x i,4 、y i,4 and z i,4 are the three-dimensional coordinate values ​​of the fourth vertex of the tetrahedron respectively; the lung ventilation is represented by the chest volume change value, and the anti-disability attribute characteristic value is obtained according to the lung ventilation curve after blunt impact.

[0043] Step S3: Obtaining injury data of the biological target and obtaining injury disability attribute characteristics;

[0044] Step S4: Assess the biological target's disability level using the resistance disability attribute characteristic values ​​and the injury disability attribute characteristics, obtaining a blunt impact disability level assessment result based on the corresponding physical indicator data and blunt impact energy value. Blunt impact is primarily intended to incapacitate the target without being fatal, or to minimize the risk of fatality. To this end, the blunt impact disability classification should possess the dual attributes of restrictive short-term resistance disability and harmful injury disability.

[0045] The specific evaluation expression is as follows:

[0046]

[0047] Where Z represents the level of disability, and Z=0, 1, 2, and 3 represent no disability, mild disability, moderate disability, and severe disability, respectively. i Represents the characteristic value of the resistance disability attribute, where i = 0, 1, and 2 represent no short-term disability, medium-level short-term disability, and high-level short-term disability, respectively; no apnea is defined as resistance disability level 0, apnea of ​​1 to 10 seconds is defined as short-term resistance disability level 1, and apnea of ​​>10 seconds is defined as disability level 2. iIt is expressed as the attribute characteristics of injury disability, where i = 0, 1, 2, indicating no injury disability, moderate injury disability, and high injury disability. Injury disability emphasizes the degree of life-threatening danger, mainly the reversibility of the injury and the risk of death of the victim. Although too low a hierarchical constraint can better protect the life safety of the victim, it will also greatly reduce the scope of application of blunt force trauma. The functional classification of long-term injury disability can refer to the "Abbreviated Injury Scale" (AIS), AIS1 is mild, AIS2 is moderate, and AIS3 is severe. According to the level of safety, when AIS is 1, it is mainly skin trauma, and the restriction of confrontational activities is low, so it should not be included in the scope of disability. AIS2 and above will have a greater impact on overall function. Therefore, we define AIS 2 as injury disability 1 and AIS ≥ 3 as injury disability 2.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit the same. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that they can still modify or replace the technical solutions of the present invention with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A method for assessing disability after blunt impact, characterized in that: The specific steps are as follows: Step S1: obtaining physical index data of a blunt impact device; Step S2: Acquiring physiological indicator data of the biological target collected by the physiological signal acquisition device during the blunt impact process for monitoring the biological target; At the same time, the behavior acquisition equipment collects the physical change data of the impact position and the biological target behavior data, and calculates the blunt impact energy value and the anti-disability attribute characteristic value respectively; Step S3: Obtaining injury data of the biological target and obtaining injury disability attribute characteristics; Step S4: Assess the disability level of the biological target by using the resistance disability attribute characteristic value and the damage disability attribute characteristic to obtain the blunt impact disability level assessment result under the corresponding physical indicator data and blunt impact energy value.

2. A method for disability assessment of blunt impact according to claim 1, characterized in that: Physical indicator data is collected through infrared optical motion capture equipment and high-speed photography equipment. The physical indicator data includes the displacement and speed of the launched projectile.

3. A blunt impact disability assessment test method according to claim 2, characterized in that: The physiological signal acquisition device is a wearable monitoring device that collects physiological indicator data of biological targets. The physiological indicator data of biological targets include electrocardiogram, blood pressure, blood oxygen, respiratory rate and end-tidal carbon dioxide value, which are used to monitor the status of biological targets.

4. A method for disability assessment of blunt impact according to claim 3, characterized in that: The behavior acquisition equipment includes an infrared motion capture device and a video recorder. The infrared motion capture device is used to capture reflective markers attached to the back of biological targets and projectiles. The formula for calculating blunt impact energy value is as follows: Where VC is the physical change disability characteristic value, v(t) is the deformation rate of the impacted part of the chest, and C(t) is the ratio of the chest deformation D(t) to the initial chest volume D0. is the differential of D(t) with respect to t.

5. A method for disability assessment of blunt impact according to claim 4, characterized in that: Biological target behavioral data include respiratory biomechanics data and behavioral change data; Respiratory biomechanics data includes lung ventilation, which is calculated by the change in reflective marker points captured by the infrared motion capture device. The calculation formula is as follows: Where V is the chest volume, v i is the volume of the tetrahedron divided in the ith part, n is the number of tetrahedrons, det[] is the determinant of the matrix, x i,1 、y i,1 and z i,1 are the three-dimensional coordinate values ​​of the first vertex of the tetrahedron, x i,2 、y i,2 and z i,2 are the three-dimensional coordinate values ​​of the second vertex of the tetrahedron, x i,3 、y i,3 and z i,3 They are the three-dimensional coordinate values ​​of the third vertex of the tetrahedron, x i,4 、y i,4 and z i,4 are the three-dimensional coordinate values ​​of the fourth vertex of the tetrahedron respectively; the lung ventilation is represented by the chest volume change value, and the anti-disability attribute characteristic value is obtained according to the lung ventilation curve after blunt impact.

6. A blunt impact disability assessment test method according to claim 5, characterized in that: In step S4, the specific evaluation expression is as follows: Among them, Z represents the disability level, X i Represents the characteristic value of the resistance disability attribute, where i = 0, 1, 2; Y i Represented as damage disability attribute characteristics, where i = 0, 1, 2.

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