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Grid marking method and device of physical evidence

A labeling method and technology of a labeling device, which are applied in the fields of biochemical equipment and methods, measurement point labeling, and determination/inspection of microorganisms, can solve problems such as omission or repeated extraction, and difficulty in investigation, achieve accurate and reliable results, and improve detection efficiency. , the effect of increasing accuracy

Pending Publication Date: 2019-08-13
重庆市公安局刑事警察总队
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AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the problem existing in the prior art that DNA extraction on physical evidence is prone to omission or repeated extraction, which brings great difficulties to the investigation of the case, and provides a Method and device for grid marking of physical evidence

Method used

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  • Grid marking method and device of physical evidence
  • Grid marking method and device of physical evidence
  • Grid marking method and device of physical evidence

Examples

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Embodiment 1

[0023] A grid marking method for physical evidence, using a laser module 1 to irradiate laser light on the same plane to form a grid-shaped laser, the grid-shaped laser divides the physical evidence into multiple small grids, and realizes the extraction of DNA from the physical evidence 2 , can be extracted according to the grid, so that there will be no omission or repeated extraction, which improves the accuracy of case investigation and saves time for case investigation.

[0024] In this embodiment, the grid-shaped laser divides the evidence into a plurality of small grids on the physical evidence, and numbers are numbered from left to right and from top to bottom at the grid in the upper left corner of the physical evidence 2, so that each grid-shaped laser Each small box has a corresponding number combination, so that the small boxes on the physical evidence have a specific number. The numbering method can be, from left to right, A, B, C, etc., from top to bottom, A, B, C,...

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Abstract

The invention relates to the technical field of physical evidence marking, in particular to a grid marking method of a physical evidence. A laser module is used for emitting lasers on a same plane toform latticed lasers, the latticed lasers make the physical evidence divided into multiple grids, the laser module performs gridding on the physical evidence, so that the physical evidence is dividedinto multiple grids, and when DNA on the physical evidence is extracted, the phenomenon of omission or repetition cannot occur, thereby improving the accuracy of case investigation and saving the timeof case investigation; gridding of the physical evidence makes the extracted DNA positioned accurately, and the position where the DNA is located is determined, thereby improving the case detection efficiency.

Description

technical field [0001] The invention relates to the technical field of physical evidence marking, in particular to a method and device for grid marking physical evidence. Background technique [0002] In the existing criminal investigation technical means, DNA testing is usually carried out on physical evidence such as tools and clothing used by criminal suspects to determine whether the criminal suspect used the corresponding tools, clothing, etc., so as to restore the criminal suspect to the maximum extent. The real circumstances of the crime that day, such as what kind of crime tools were used, whether the blood stains on the clothes were worn when the crime was committed, etc. [0003] The current method of extracting DNA from physical evidence mainly uses cotton swabs to extract DNA from the surface of the physical evidence. The location of the cotton swab to extract DNA is always a small area, and the entire surface of the cotton swab will not be rubbed back and forth ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12Q1/6806G01C15/02H01S3/10
CPCC12Q1/6806G01C15/02H01S3/10
Inventor 李红卫喻永敏黄翼汪昌丽王友政荆玉婷王清山王科
Owner 重庆市公安局刑事警察总队
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