An image acquisition device with microscopic magnification

Abstract

The utility model discloses an image acquisition equipment with microscopic amplification function relates to criminal investigation evidence collection technical field, and this image acquisition equipment includes detection platform, and the upper end fixed connection support column of detection platform is equipped with lifting mechanism on support column, and lifting mechanism connects fixed plate, and is equipped with microscopic imaging mechanism and multiband light source module on fixed plate, and microscopic imaging mechanism connects printing unit, and the lower end of detection platform is equipped with the mobile component of convenient mobile equipment, through microscopic imaging mechanism, the microscopic amplification to the evidence has been done, has improved the efficiency and accuracy of material evidence detection, through laser range finder and standard calibration board, various information found on the detection material can be accurately measured, so that the extraction work becomes more and more fast, and the printing unit is matched to carry out the printing of real -time collection fingerprint, has high sensitivity, non -destructive, fast appearance etc.

Description

Technical Field

[0001] This utility model relates to the field of criminal investigation and evidence collection technology, specifically an image acquisition device with microscopic magnification function. Background Technology

[0002] Criminal investigation is a procedural activity in which public security organs and people's procuratorates, in accordance with legal procedures, collect evidence to prove crimes, apprehend criminals, and take necessary coercive measures against criminal suspects in the course of investigation for cases that have been filed. In criminal investigation work, the search, discovery, analysis, and collection of trace physical evidence are crucial to solving cases.

[0003] Currently, traditional physical evidence testing equipment cannot perform automatic identification, marking, measurement, and feature entry functions during microscopic observation and comparison. This makes the comparison and examination of physical evidence extremely cumbersome, greatly increases the workload of evidence collection, and the equipment is bulky, difficult to transport, and inconvenient to use.

[0004] Based on this, an image acquisition device with microscopic magnification function is now provided, which can eliminate the drawbacks of existing devices. Utility Model Content

[0005] The purpose of this invention is to provide an image acquisition device with microscopic magnification function to solve the problems in the background technology.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An image acquisition device with microscopic magnification function includes a detection platform. The upper end of the detection platform is fixedly connected to a support column. A lifting mechanism is provided on the support column. The lifting mechanism is connected to a fixed plate. A microscopic imaging mechanism and a multi-band light source module are provided on the fixed plate. The microscopic imaging mechanism is connected to a printing unit. The lower end of the detection platform is provided with a movable component to facilitate the movement of the device.

[0008] Based on the above technical solutions, this utility model also provides the following optional technical solutions:

[0009] In one alternative embodiment: the lifting mechanism includes a screw, which is rotatably connected to a corresponding groove on a support column. The upper end of the screw is fixedly connected to a motor, and the outer end of the screw is threadedly connected to a slider, which is fixedly connected to a fixed plate.

[0010] In one alternative embodiment: the microscopic imaging mechanism includes an industrial camera, which is fixedly connected to a mounting plate. A microscope is fixedly connected to the lens of the industrial camera. The industrial camera is electrically connected to an image processor, which is electrically connected to a computer. The computer is electrically connected to a display, which is fixedly connected to a support column. The computer is electrically connected to a laser rangefinder, which is fixedly connected to the mounting plate. The detection platform is equipped with a standard calibration plate that matches the laser rangefinder.

[0011] In one alternative: the multi-band light source module includes a mounting bracket, which is fixedly connected to a mounting plate. The mounting bracket is also fixedly connected to a multi-band light source board. The multi-band light source board is provided with five LED beads of different wavelengths, which respectively support 365nm, 445nm, 532nm, 750nm, and white light. The multi-band light source board is electrically connected to a computer.

[0012] In one alternative: the printing unit includes a printer electrically connected to a computer.

[0013] In one alternative: the movable component includes four casters, which are fixedly connected to the lower end of the detection platform. The lower end of the detection platform is threaded to one end of a support rod, and the other end of the support rod is rotatably connected to a support pad.

[0014] In one alternative: the objective lens of the microscope can have a magnification of up to 250x.

[0015] In one alternative: the image processor uses an integrated NVIDIA Jetson Nano development board that supports GPU acceleration of the Halcon algorithm library.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] This invention achieves microscopic magnification of evidence through a microscopic imaging mechanism, enabling precise searching and discovery of trace information and microscopic display of biological remains, thus improving the efficiency and accuracy of evidence detection. Through a laser rangefinder and standard calibration plate, various information found on the sample can be precisely measured. The collection, observation, measurement, and marking of characteristic traces of physical evidence make preliminary work on the characteristic traces of bullet casing evidence much faster. Combined with a printing unit, it can print fingerprints immediately after collection, featuring high sensitivity, non-destructive nature, and rapid display, providing effective support for the acquisition of trace evidence and trace evidence in criminal cases in the field of forensic science. Attached Figure Description

[0018] Figure 1This is a schematic diagram of the structure of this utility model.

[0019] Figure 2 This is a schematic diagram of the structure of the computer part of this utility model.

[0020] Figure 3 This is a structural schematic diagram of the lifting mechanism of this utility model.

[0021] Figure 4 This is a schematic diagram of the structure of the multi-band light source board of this utility model.

[0022] Figure reference numerals: 100, Detection platform; 101, Support column; 102, Fixing plate; 201, Industrial camera; 202, Microscope; 203, Image processor; 204, Computer; 205, Monitor; 206, Laser rangefinder; 207, Standard calibration plate; 301, Screw; 302, Motor; 303, Slider; 401, Fixing frame; 402, Multi-band light source board; 500, Printer; 601, Caster wheel; 602, Support rod; 603, Support pad. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0024] In one embodiment, such as Figures 1-4 As shown, an image acquisition device with microscopic magnification function includes a detection platform 100. The upper end of the detection platform 100 is fixedly connected to a support column 101. The support column 101 is equipped with a lifting mechanism, which is connected to a fixed plate 102. The fixed plate 102 is equipped with a microscopic imaging mechanism and a multi-band light source module. The microscopic imaging mechanism is connected to a printing unit. The lower end of the detection platform 100 is equipped with a movable component for easy movement. When evidence is placed on the detection platform 100, the evidence is microscopically imaged by the microscopic imaging mechanism. With the help of the multi-band light source module, comprehensive evidence information can be obtained more effectively. The printing unit prints the acquired evidence information immediately, increasing work efficiency. The movable component allows the device to be easily moved to a designated location.

[0025] In this embodiment, as Figure 3 As shown, the lifting mechanism includes a screw 301, which is rotatably connected to a corresponding groove on the support column 101. The upper end of the screw 301 is fixedly connected to a motor 302, and the outer end of the screw 301 is threadedly connected to a slider 303. The slider 303 is fixedly connected to the fixing plate 102. The motor 302 drives the screw 301 to rotate, which in turn drives the slider 303 to move up and down, thereby adjusting the distance between the microscopic imaging mechanism and the object being detected, so as to achieve better imaging.

[0026] In one embodiment, such as Figure 1 As shown, the microscopic imaging mechanism includes an industrial camera 201, which is fixedly connected to a fixed plate 102. A microscope 202 is fixedly connected to the lens of the industrial camera 201. The industrial camera 201 is electrically connected to an image processor 203, which is electrically connected to a computer 204. The computer 204 is electrically connected to a display 205, which is fixedly connected to a support column 101. The computer 204 is electrically connected to a laser rangefinder 206, which is fixedly connected to the fixed plate 102. The detection platform 100 is equipped with a standard calibration plate 207 that matches the laser rangefinder 206. When acquiring images of evidence, first... The evidence is placed on a standard calibration plate 207, which can be a 200μm grid calibration plate made of quartz glass. Before measurement, the calibration plate is photographed by an industrial camera 201 to generate a calibration matrix and eliminate optical distortion errors. The microscope 202 magnifies the evidence, which can clearly present the characteristics of microscopic traces. The magnified image is acquired by the industrial camera 201 and transmitted to the image processor 203. The image processor 203 performs real-time image edge detection, feature point recognition and other preprocessing. Then, the laser rangefinder 206 assists in calibrating the conversion coefficient between image pixels and actual physical size, thereby achieving the effect of precision measurement. The image is then transmitted to the computer 204 and displayed on the monitor 205.

[0027] In one embodiment, such as Figure 1 and Figure 4 As shown, the multi-band light source module includes a mounting bracket 401, which is fixedly connected to a mounting plate 102. The mounting bracket 401 is also fixedly connected to a multi-band light source plate 402. The multi-band light source plate 402 is equipped with five LED beads of different wavelengths, supporting 365nm, 445nm, 532nm, 750nm, and white light respectively. The multi-band light source plate 402 is electrically connected to a computer 204. To achieve efficient excitation and observation of different physical evidence, the multi-band light source module... The segment light source module integrates multiple light sources of different wavelengths; the 365nm ultraviolet light source effectively excites fluorescent substances in many physical evidences, making them fluoresce, which is convenient for the discovery and observation of trace evidence such as hair, fibers, and bodily fluids; the 445nm blue light source can be used to enhance the display effect of physical evidence such as fingerprints and gunshot residues; the 532nm green light source performs well in the examination of biological samples such as bloodstains and semen stains; and the 750nm near-infrared light can penetrate media such as paper, plastic, and thin fabrics, which is suitable for the detection of hidden traces.

[0028] In one embodiment, such as Figure 1As shown, the printing unit includes a printer 500, which is electrically connected to a computer 204. The printer 500 prints out a series of information such as the detected fingerprint, enabling immediate printing upon sampling.

[0029] In one embodiment, such as Figure 1 As shown, the movable component includes four casters 601, which are fixedly connected to the lower end of the detection platform 100. The four corners of the lower end of the detection platform 100 are threadedly connected to one end of a support rod 602, and the other end of the support rod 602 is rotatably connected to a support pad 603. When the device needs to be moved, it can be easily moved to a designated location by means of the casters 601. When it is moved into place, the support rod 602 is rotated, which drives the support pad 603 to move downward and support the device.

[0030] In one embodiment, such as Figure 1 As shown, the objective lens of the microscope 202 has a maximum magnification of up to 250x, providing better microscopic magnification of evidence, and supports up to approximately 250x microscopic magnification.

[0031] In one embodiment, such as Figure 1 As shown, the image processor 203 uses an integrated NVIDIA Jetson Nano development board and supports GPU acceleration of the Halcon algorithm library. The image processor 203 supports image annotation function through the Halcon algorithm library. Users can use a mouse to annotate the detected image with rectangles, circles and other graphics on the monitor 205 of the computer 204.

[0032] The above embodiments disclose an image acquisition device with microscopic magnification function. When acquiring images of evidence, the evidence is first placed on a standard calibration plate 207, which can be a 200μm grid calibration plate made of quartz glass. Before measurement, an industrial camera 201 photographs the calibration plate to generate a calibration matrix, eliminating optical distortion errors. A microscope 202 magnifies the evidence, clearly presenting the characteristics of microscopic traces. The magnified image is acquired by the industrial camera 201 and transmitted to an image processor 203. The image processor 203 performs real-time image edge detection, feature point recognition, and other preprocessing. A laser rangefinder 206 assists in calibrating the conversion coefficient between image pixels and actual physical dimensions, thereby achieving accurate measurement. The image is then transmitted to a computer 204 and displayed on a monitor 205. By observing the evidence under different spectral conditions using light sources of different wavelengths, multi-dimensional trace analysis is achieved, providing effective support for the acquisition of trace evidence and micro-evidence in criminal cases in the field of forensic science.

[0033] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An image acquisition device with microscopic magnification function, comprising a detection platform (100), characterized in that, The upper end of the detection platform (100) is fixedly connected to a support column (101), the support column (101) is provided with a lifting mechanism, the lifting mechanism is connected to a fixed plate (102), the fixed plate (102) is provided with a microscopic imaging mechanism and a multi-band light source module, the microscopic imaging mechanism is connected to a printing unit, and the lower end of the detection platform (100) is provided with a moving component that facilitates the movement of the equipment.

2. The image acquisition device with microscopic magnification function according to claim 1, characterized in that, The lifting mechanism includes a screw (301), which is rotatably connected to a corresponding groove on a support column (101). The upper end of the screw (301) is fixedly connected to a motor (302), and the outer end of the screw (301) is threadedly connected to a slider (303). The slider (303) is fixedly connected to a fixing plate (102).

3. The image acquisition device with microscopic magnification function according to claim 1, characterized in that, The microscopic imaging mechanism includes an industrial camera (201), which is fixedly connected to a fixed plate (102). A microscope (202) is fixedly connected to the lens of the industrial camera (201). The industrial camera (201) is electrically connected to an image processor (203). The image processor (203) is electrically connected to a computer (204). The computer (204) is electrically connected to a display (205). The display (205) is fixedly connected to a support column (101). The computer (204) is electrically connected to a laser rangefinder (206). The laser rangefinder (206) is fixedly connected to the fixed plate (102). A standard calibration plate (207) matching the laser rangefinder (206) is provided on the detection platform (100).

4. The image acquisition device with microscopic magnification function according to claim 1, characterized in that, The multi-band light source module includes a mounting bracket (401), which is fixedly connected to a mounting plate (102). The mounting bracket (401) is fixedly connected to a multi-band light source board (402). The multi-band light source board (402) is provided with five LED beads of different wavelengths. The five LED beads support 365nm, 445nm, 532nm, 750nm and white light, respectively. The multi-band light source board (402) is electrically connected to a computer (204).

5. An image acquisition device with microscopic magnification function according to claim 1, characterized in that, The printing unit includes a printer (500) which is electrically connected to a computer (204).

6. The image acquisition device with microscopic magnification function according to claim 1, characterized in that, The movable component includes four casters (601), which are fixedly connected to the lower end of the detection platform (100). The lower end of the detection platform (100) is threaded to one end of a support rod (602), and the other end of the support rod (602) is rotatably connected to a support pad (603).

7. An image acquisition device with microscopic magnification function according to claim 3, characterized in that, The objective lens of the microscope (202) can have a magnification of up to 250 times.

8. An image acquisition device with microscopic magnification function according to claim 3, characterized in that, The image processor (203) uses an integrated NVIDIA Jetson Nano development board and supports GPU acceleration of the Halcon algorithm library.

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