CN215263107U

CN215263107U - Novel trace detection system

Info

Publication number: CN215263107U
Application number: CN202121101254.4U
Authority: CN
Inventors: 侯亚齐; 杨絮; 项双喜
Original assignee: Changchun University of Science and Technology
Current assignee: Changchun University of Science and Technology
Priority date: 2021-05-21
Filing date: 2021-05-21
Publication date: 2021-12-21
Anticipated expiration: 2031-05-21

Abstract

The utility model provides a novel vestige detecting system, include: the device comprises a CCD camera, a lens, a light filter, an annular light source, a polarizer, an analyzer, a detection table, a data transmission module and a computer, wherein the light source is connected with a power supply, and the power supply is connected with a power switch. The annular light source shell is provided with a brightness adjusting knob and a light source type switching knob. The lens is arranged below the CCD camera, the annular light source is arranged below the lens, and the lens can shoot a target trace through the annular light source. The utility model discloses an install multiple light source additional, can not only reduce the external environment influence, integrate light source and polarization equipment moreover, as long as through the simple and convenient operation of staff, just can obtain the higher polarization image of vestige detail definition, improve detection efficiency. And finally, transmitting the obtained polarization image to a computer for registration and fusion processing through a data transmission module, and further optimizing.

Description

Novel trace detection system

Technical Field

The utility model relates to a criminal investigation equipment technical field especially relates to a novel vestige detecting system.

Background

In criminal investigation, the trace left on the scene is often of great significance for case detection. The search, extraction and identification of the spot trace are more important. When the existing polarization detection instrument detects traces in the early stage, an initial polarization image is obtained by only adding a polarizer in the operation process of the equipment. Because the polarization characteristics of different objects are different, the position needs to be continuously adjusted to find the optimal incident angle during operation, and meanwhile, the polarizer needs to be continuously and manually adjusted to achieve the optimal imaging effect. Therefore, the operation is complicated, and the imaging result is easily interfered by human factors. Meanwhile, the imaging environment is very restricted by the field illumination condition, so that the imaging effect precision of the finally-detected trace is insufficient.

Therefore, there is a need to design a new trace detection system to overcome the above-mentioned drawbacks.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a novel vestige detecting system, this system can not only reduce the external environment influence through installing multiple light source additional, integrates light source and polarization equipment moreover, as long as through the simple and convenient operation of staff, just can obtain the higher polarization image of vestige detail definition, improves detection efficiency. And finally, transmitting the obtained polarization image to a computer for registration and fusion processing through a data transmission module, and further optimizing.

In order to achieve the above object, the utility model provides a novel trace detection system, include: the device comprises a CCD camera, a lens, a light filter, an annular light source, a polarizer, an analyzer, a detection table, a data transmission module and a computer; the annular light source is connected with a power supply, the power supply is connected with a power switch, the annular light source is provided with a shell, and the shell is provided with a brightness adjusting knob and a light source type switching knob; the lens is arranged below the CCD camera, the annular light source is arranged below the lens, and the lens penetrates through the annular light source to collect target traces.

Preferably, the polarizer is mounted on the annular light source and integrated with the annular light source.

Preferably, the annular light source is an LED lamp, and the brightness of the LED lamp is adjustable.

Preferably, the annular light source is provided with a common light source, an infrared light source and an ultraviolet light source which can be switched.

Preferably, an analyzer is additionally arranged in the middle of the annular light source.

Preferably, an optical filter is disposed between the lens and the analyzer.

Preferably, there is a corresponding angular setting between the polarizer and the analyzer.

Preferably, the data transmission module is connected with the CCD camera to realize data transmission.

Compared with the prior art, the utility model provides a novel vestige detecting system's beneficial effect includes:

1. the utility model discloses a reply complicated external light environment, add medium and long wave infrared light sum ultraviolet ray on the basis of original ordinary light source. Meanwhile, the annular light source is adopted, so that light rays are uniformly diffused, and the stability of the light source is improved. No shadow, reduced light interference and improved image quality.

2. The polarizer, the analyzer and the annular light source are combined, the polarization and the light are integrated, the installation step of a polarization device is omitted, the light source and the polarization device are adjusted to the optimal position, the polarization device can be directly used, and the convenience is greatly improved.

3. The mode of incidence by the active polarized light source can obtain a polarization characteristic image with higher contrast and higher quality, and the image is easier to identify in the aspects of details such as outlines, edges and the like.

4. The light source is an LED (light emitting diode) device, so that the stroboflash is avoided, the service life is long, the environment is protected, the safety is realized, and the device is cheap and durable. The polarizer and the analyzer are made of special composite materials, and have the characteristics of wear resistance, high temperature resistance, high light transmittance and the like.

Drawings

FIG. 1 is a top view of the ring light source of the present invention;

FIG. 2 is a schematic view of the overall structure of the present invention;

in the figure, 1-light source brightness adjusting knob, 2-light source type switching knob, 3-annular light source, 4-base, 5-data transmission module, 6-CCD camera, 7-lens, 8-optical filter, 9-analyzer, 11-LED lamp, 12-polarizer, 13-connecting rod, 14-detection table.

Detailed Description

In order to further understand the objects, structures, features and functions of the present invention, the following embodiments are described in detail.

Certain terms are used throughout the description and following claims to refer to particular components. As one of ordinary skill in the art will appreciate, manufacturers may refer to a component by different names. The present specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to.

In fig. 1, a polarizer and an analyzer 9 are added to an annular light source 3, the light source and polarization are integrated, and the polarizer and the analyzer 9 are adjusted to an angle to ensure an optimal working state in an initial state. Therefore, the operation steps are simplified, and the efficiency of workers is improved. In order to deal with the interference under different light environments, a light source brightness adjusting knob 1 and a light source type switching knob 2 are further arranged on the annular light source 3.

Preferably, the brightness adjusting knob 1 can adjust the brightness in 3 steps.

Preferably, the light source kind switching knob 2 can be adjusted between a general light source, medium and long wavelength infrared light and ultraviolet light.

In the embodiment shown in fig. 2, the CCD camera 6 is connected to the base 4 through the connecting rod 13, and the data transmission module 5 is additionally installed on the CCD camera 6, so that the polarized image can be transmitted to a computer, and the staff can rapidly perform the next processing. The CCD camera 6 is linked to a lens 7 so that different targets can be detected. The polarizer 12 is arranged under the LED lamp 11 in the annular light source 3, the analyzer 9 is arranged in the middle of the annular light source 3, the polarizer, the analyzer and the annular light source are integrated, and the corresponding angle is adjusted, so that a complex installation and debugging stage is omitted in the subsequent detection, and the convenience is improved.

Preferably, a filter 8 is additionally arranged between the lens 7 and the analyzer 9, so that stray light can be filtered.

Preferably, the lens 7, the detection stage 14 and the filter 8 are all rotationally adjustable. Preferably, the LED light source 11 is selected, and the LED light source has the advantages of no stroboflash, long service life, environmental protection, safety, cheapness, durability and the like.

Preferably, the polarizer 12 and the analyzer 9 are made of customized special composite materials, and have the characteristics of wear resistance, high temperature resistance, high light transmittance and the like.

The using process of the embodiment is as follows:

during detection, a target trace to be detected is placed on the detection table 14, the annular light source 3 is turned on, the light source brightness adjusting knob 1 and the light source type switching knob 2 are adjusted according to the field environment, a proper light source and brightness are selected, and the light source is changed into active polarized light through the polarizer 12 and irradiates on the trace to be detected. The CCD camera 6, the lens 7, the optical filter 8, the annular light source 3 and the detection table 14 are arranged under the same straight line. The reflected light generated by the mark to be detected after being irradiated by the polarized light can enter the lens 7 through the optical filter 8 and the analyzer 9. After the CCD camera takes 6 the polarization image, the image is transmitted to a computer through a data transmission module 5, and the staff carries out the following image registration and fusion processing.

The present invention has been described in relation to the above embodiments, which are only examples for implementing the present invention. It should be noted that the disclosed embodiments do not limit the scope of the invention. On the contrary, all changes and modifications which do not depart from the spirit and scope of the present invention are deemed to fall within the scope of the present invention.

Claims

1. A novel trace detection system, comprising: the device comprises a CCD camera, a lens, a light filter, an annular light source, a polarizer, an analyzer, a detection table, a data transmission module and a computer;

the annular light source is connected with a power supply, the power supply is connected with a power switch, the annular light source is provided with a shell, and the shell is provided with a brightness adjusting knob and a light source type switching knob;

the lens is arranged below the CCD camera, the annular light source is arranged below the lens, and the lens penetrates through the annular light source to collect target traces.

2. A novel trace detection system as claimed in claim 1, wherein: the polarizer is arranged on the annular light source and is integrated with the annular light source.

3. A novel trace detection system as claimed in claim 1, wherein: the annular light source is an LED lamp, and the brightness of the LED lamp is adjustable.

4. A novel trace detection system as claimed in claim 1, wherein: the annular light source is provided with a common light source, an infrared light source and an ultraviolet light source which can be switched.

5. A novel trace detection system as claimed in claim 1, wherein: and an analyzer is additionally arranged in the middle of the annular light source.

6. A novel trace detection system as claimed in claim 1, wherein: and an optical filter is arranged between the lens and the analyzer.

7. A novel trace detection system as claimed in claim 1, wherein: there is a corresponding angular setting between the polarizer and the analyzer.

8. A novel trace detection system as claimed in claim 1, wherein: the data transmission module is connected with the CCD camera to realize data transmission.