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Integrated trace bloodstain imaging and remaining time analyzing device

A time analysis and bloodstain technology, applied in the direction of measuring devices, image analysis, and analysis materials, etc., can solve the problems of chemical composition limitation, inability to analyze and infer bloodstain formation time, blood remaining time calculation device, etc., to achieve efficient strike and rapid analysis , good impetus effect

Pending Publication Date: 2017-05-31
CHINA CRIMINAL POLICE UNIV
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  • Claims
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AI Technical Summary

Problems solved by technology

However, the analysis of chemical composition is limited by experimental conditions
[0004] Existing chemical analysis methods of blood retention time cannot be implemented in routine field
However, the existing bloodstain imaging system cannot analyze and infer the formation time of bloodstains.
At present, there is no report about the blood remaining time calculation device

Method used

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  • Integrated trace bloodstain imaging and remaining time analyzing device
  • Integrated trace bloodstain imaging and remaining time analyzing device

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Experimental program
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Effect test

Embodiment Construction

[0011] The box body 1 is equipped with foam to form a foam box, and the lighting lamp 2 is a ring-shaped LED bulb, which is fixed above the box body 1; the mobile phone 5 fixing column is fixed at the center of the ring-shaped LED bulb in the box body, and the bloodstain placer is at the bottom of the box body. center. The ratio of the imaging aperture at the top of the box 1 to the depth of the box obscura is 1:15-1:20.

[0012] We connected the imaging system and the data processing and computing system on top of the camera obscura. Through mathematical analysis of standardized bloodstain photos, effective parameters are extracted and calculated according to formula fitting.

[0013] We have determined the optimal ratio of the imaging aperture to the depth of the obscura through repeated experiments, and the best ratio is within the range of 1:15-1:20. In this range, problems related to lighting projection and image acquisition range can be effectively eliminated.

[0014...

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Abstract

An integrated trace bloodstain imaging and remaining time analyzing device belongs to the technical field of criminal science and comprises a box body, a floodlight, a mobile phone fixing pillar, a mobile phone and a bloodstain container, wherein the box body is filled with foam to form a foam box; the floodlight is an annular LED bulb and is fixed at the upper part of the box body; the mobile phone fixing pillar is fixed in the center of the annular LED bulb in the box body; a small hole is formed in the top of the box body, and the mobile phone is fixed at the top of the box body; the bloodstain container is arranged in the bottom center of the box body; the ratio of the imaging aperture at the top of the box body to the depth of a camera bellows is (1:15)-(1:20); the color temperature of the LED bulb is 6500 k; a camera of the mobile phone has the pixel of more than 12,000,000. The integrated tract bloodstain imaging and remaining time analyzing device can quickly analyze trace bloodstain on a crime scene in real time, does not demand much on the experimental conditions, can realize time estimation according to the bloodstain on site, and has a very good pushing function for quickly and efficiently fighting crimes.

Description

technical field [0001] The invention relates to criminal science technology, in particular to an integrated trace bloodstain imaging and remaining time analysis device. Background technique [0002] The determination of the time of bloodstains can play an important role in inferring the time of the incident. The formation time of bloodstains can help investigators obtain more information about the case and exclude bloodstains that are not related to the case. [0003] Existing analysis methods for the remaining time of blood are mainly carried out from two aspects: the physical and chemical properties and chemical components of the blood stains: extract the blood stains on the spot, and then perform RNA analysis, high-performance liquid spectroscopy, near-infrared spectroscopy, ultraviolet-visible spectroscopy, reflectance spectroscopy and high-efficiency spectroscopy. spectral images, etc. However, the analysis of chemical composition is limited by experimental conditions...

Claims

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Application Information

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IPC IPC(8): G01N21/01G01N21/84G06T7/00
CPCG06T7/00G01N21/01G01N21/84G01N2201/102G01N2201/062G01N2201/0221G01N2021/0112G06T2207/10004
Inventor 郑吉龙温洪洋贾旭东张文骥单迪王玖琳倪首涛章彪
Owner CHINA CRIMINAL POLICE UNIV
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