Physical evidence trace acquisition equipment

Abstract

The invention relates to the technical field of criminal investigation, in particular to physical evidence trace acquisition equipment. The physical evidence trace acquisition equipment comprises a support frame, a mounting table arranged on the support frame and a main machine arranged on the mounting table; the main machine comprises a shell, a lighting device, a detector, a processor and a displayer; and the lighting device, the detector and the displayer are electrically connected with the processor, the lighting device is used for emitting light sources in different wavebands to irradiatea to-be-detected environment, the detector is used for acquiring images of the to-be-detected environment under irradiation of the light sources in different wave bands and sending the images to theprocessor, the processor is used for controlling the working state of the lighting device and the detector and conducting analysis processing on the received images, and the displayer is used for displaying the images. Compared with the prior art, the physical evidence trace acquisition equipment achieves great improvement on the operation convenience.

Description

technical field [0001] The invention relates to the technical field of criminal investigation, in particular to a device for acquiring physical evidence traces. Background technique [0002] In criminal investigation work, it is necessary to conduct on-site inspection and evidence collection for various traces. Most of the physical and chemical methods used in the discovery and extraction of trace evidence will pollute or destroy the physical evidence itself. In recent years, the methods of extracting trace evidence using various optical methods have also been gradually applied. The use of specific light source system equipment can effectively stimulate the inherent fluorescence of trace evidence such as fingerprints, footprints, bloodstains, and fibers left at the crime scene, so that different traces of evidence will respond under specific wavelength light, which is convenient for the discovery and search of on-site traces and evidence. To a certain extent, the display ab...

AI Technical Summary

Problems solved by technology

[0003] At present, limited by the characteristics of the light source system and the limitation of physical evidence extraction methods, the ability and efficiency of using optical methods to extract physical evidence is still not high enough, and in actual work, the requirements for the standardization and scientificity of on-site investigations by criminal technicians of public security organs are becoming more and more important. Stricter, high-quality site survey standards and the update of inspection equipment also put forward higher requirements for the performance of the light source system. Therefore, the existing criminal technology light source system equipment has problems such as low accuracy, large size, and poor practicability. It has also become prominent and has become an important issue restricting the development of criminal technology

In addition, the existing criminal technology light source system needs to be equipped with a huge power supply system, light source system system (halogen lamp, fluorescent lamp, high pressure sodium lamp or xenon lamp), filter system (filter lens filter), etc., so this kind of light source system equipment All of them generally have the disadvantages of being unable to meet the selective requirements of light, low light extraction efficiency, weak observability of excited fluorescence, short life, large heat generation, etc., and due to the complex structure of the existing criminal technology light source system, it is often arranged during the installation process It is cumbersome and has caused great troubles to grassroots investigators, affecting the efficiency of criminal investigations

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