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CN-122004833-A - Tool and method for measuring space angle of wound

CN122004833ACN 122004833 ACN122004833 ACN 122004833ACN-122004833-A

Abstract

The application belongs to the field of criminal investigation measurement, and particularly relates to a tool and a method for measuring a space angle of a wound. The device comprises a probe, three mutually perpendicular reference surfaces movably connected with the probe, wherein the reference surfaces can rotate around the probe, the angle between the reference surfaces and the probe is variable, a spherical hole seat is arranged at the intersection of the reference surfaces, a spherical joint matched and connected with the spherical hole seat is arranged on the probe, and the device further comprises a measuring ruler used for measuring the distance between the vertex of the reference surface and the tail end of the probe. After the distance is measured, the space angle can be obtained according to the cosine theorem.

Inventors

  • MA BINZHI
  • DING RUNZHI
  • WANG DEHU

Assignees

  • 马赟之

Dates

Publication Date
20260512
Application Date
20260310

Claims (5)

  1. 1. A tool for measuring the space angle of a wound is characterized by comprising a probe (3) and three mutually perpendicular reference surfaces (1) movably connected with the probe (3), The reference surface (1) is rotatable about the probe (3); -the angle between the reference surface (1) and the probe (3) is variable; a spherical hole seat (2) is arranged at the intersection of the reference surface (1), and a spherical joint which is matched and connected with the spherical hole seat (2) is arranged on the probe (3); The measuring scale (5) is used for measuring the distance between the vertex of the reference surface (1) and a specific point on the probe (3).
  2. 2. A tool for measuring the angle of a space angle of a wound according to claim 1, characterized in that the spherical hole seat (2) is provided with a hollow sphere of a through hole, the central axis of which is at the same angle as the arbitrary reference plane (1) and/or the intersection line of the reference planes (1).
  3. 3. A tool for measuring the angle of a space angle of a wound according to claim 2, characterized in that the central axis of the probe (3) coincides with the centre of sphere of the ball joint.
  4. 4. A tool for measuring the spatial angle of a wound according to claim 3, characterized in that the sphere of the spherical socket (2) is located at point O, OAB, OBC, OCA is three mutually perpendicular reference planes (1), OA, OB, OC intersect at point O and are mutually perpendicular, and point A, B, C is the vertex, respectively.
  5. 5. A method for measuring the space angle of a wound, which is characterized in that the method uses the space angle measuring tool for the wound, which is characterized in that the specification size of the tool is oa=ob=oc=r, and the distance between a point O and a point P at the tail end of a probe (3) is L; The method comprises the following steps; S1, inserting the front end of a probe (3) into a wound and fitting the wound; S2, enabling any two reference surfaces (1) to be parallel to any two basic human body tangential surfaces; S3, measuring the length d 1 、d 2 、d 3 of the three peaks A, B, C and the point P at the tail end of the probe (3); The space angle between the OL and the plane OBC is , Then ; And similarly calculating the included angles with the other two reference surfaces (1).

Description

Tool and method for measuring space angle of wound Technical Field The application belongs to the field of criminal investigation measurement, and particularly relates to a tool and a method for measuring a space angle of a wound. Background The basic tangential plane of the human body is a human anatomy term and refers to three mutually perpendicular anatomical planes consisting of a sagittal plane, a coronal plane and a horizontal plane. The space angle measurement of the wound is the included angle formed by the penetrated wound on the body, the coronal plane, the sagittal plane and the horizontal plane. The application of the channel space angle data is embodied in the construction of a multidimensional evidence chain, and the core significance of the channel space angle data is that objective and quantitative basis is provided, so that the scientificity and legal effectiveness of an identification conclusion are ensured. The applicant provides a measuring tool in advance, which comprises a probe and a plurality of mutually perpendicular reference surfaces movably connected with the probe, wherein the reference surfaces can rotate around the probe, the angle between the reference surfaces and the probe is variable, an indicating needle parallel to the reference surfaces is arranged on the reference surfaces, a scale is connected on the indicating needle, and the space angle is obtained through a tangent function after the distance between the scale and the probe is measured. Disclosure of Invention The application aims to provide a measuring tool capable of rapidly measuring the space angle of a wound, optimize the structure of the measuring tool and improve the measuring method. The technical scheme provided by the application is as follows in order to solve the technical problems: The tool for measuring the space angle of the wound is characterized by comprising a probe and three mutually perpendicular reference surfaces which are movably connected with the probe; the reference surface can rotate around the probe; The angle between the reference surface and the probe is variable; a spherical hole seat is arranged at the intersection of the reference surfaces, and a spherical joint which is in fit connection with the spherical hole seat is arranged on the probe; The measuring ruler is used for measuring the distance between the vertex of the reference surface and a specific point of the probe, and the specific point can select the tail end of the probe. Further, the spherical hole seat is provided with a hollow sphere of a through hole, and the central axis of the through hole is the same as the angle of any reference surface and/or the intersection line of the reference surfaces. Further, the probe center axis coincides with the center of sphere of the ball joint. Further, the spherical shape of the spherical socket is at point O, OAB, OBC, OCA are three mutually perpendicular reference planes respectively, OA, OB, OC intersect at point O and are mutually perpendicular, and point A, B, C are vertices respectively. These points are defined for a clearer description of the measurement method hereinafter. The method is applied to the lane space angle measuring tool, and the specification size of the tool is oa=ob=oc=r, and the distance between the point O and the point P at the tail end of the probe is L; The method comprises the following steps of; s1, inserting the front end of a probe into a wound and fitting the front end of the probe with the wound; s2, enabling any two reference surfaces to be parallel to any two basic human body tangential surfaces; S3, measuring the length d 1、d2、d3 of the three vertexes A, B, C and the point P at the tail end of the probe; The space angle between the OL and the plane OBC is , Then (The basic calculation principle is the cosine theorem, due toIs the complementary angle of AOP, thus obtaining the above formula And similarly calculating the included angles with the other two reference surfaces. 。 The application has the beneficial effects that by arranging three reference surfaces which are mutually perpendicular and can freely rotate around the probe, when in measurement, any two reference surfaces are only required to be attached to or parallel with any two basic tangential surfaces (coronal surface, sagittal surface and horizontal surface) of a human body, and the third reference surface can be automatically attached to or parallel with the rest basic tangential surfaces, thereby overcoming the defect that a single protractor or a double protractor is difficult to be simultaneously and accurately attached to three basic tangential surfaces of the human body in the prior art, realizing one-time complete alignment, and greatly reducing operation difficulty and accumulated rotation error. Because r and L in the formula are tool delivery fixed values, only three distances d 1、d2、d3 are left in actual measurement, the whole measurement process can be completed within