High-magnification biological sample discovery equipment

Abstract

The utility model discloses a high-magnification biological sample discovering device, relates to the technical field of trace identification, and solves the problems that the existing biological sample discovering device is difficult to discover small evidence traces and is inconvenient to take materials. A display screen; a camera; an objective lens; at least one filter; a plurality of lamp beads capable of emitting light with different wavelengths are arranged on the lamp bead control circuit board; the main control board is electrically connected with the camera, the display screen and the lamp bead control circuit board; and the power panel is electrically connected with the master control panel, and the power panel is externally connected with a power supply. According to the biological sample machine, the camera and the display screen are matched to realize visual evidence obtaining operation, and the camera can shoot the condition of a biological sample generating fluorescence reaction on a material evidence through the filter and upload an image to the display screen to be displayed, so that the display screen can be directly observed for evidence obtaining; and the objective lens is matched with the camera, so that the target image can be magnified by dozens of hundreds of times.

Description

TECHNICAL FIELD

[0001] The utility model relates to trace identification technical field, especially a high multiple biological evidence discovery equipment. BACKGROUND

[0002] The biological evidence equipment developed by using the principle that objects will excite fluorescence reaction under the irradiation of specific wavelength spectrum is widely used in various fields requiring survey, especially in the field of criminal investigation. Through the biological evidence equipment, criminal investigators can survey biological traces at crime scenes, such as fingerprints, hair, bones, blood, and human secretions.

[0003] However, the light sources on the currently used biological evidence equipment are relatively single, usually only a few. Different biological evidence will not show the same fluorescence reaction under the irradiation of specific wavelength spectrum. If the types of light sources are few, the display effect of some biological evidence is not very good, and the contour shape of the biological evidence cannot be clearly displayed. Therefore, some special biological evidence cannot be well displayed. At the same time, the existing biological evidence equipment is mostly biological evidence discovery equipment equipped with only light sources. Most biological evidence equipment is not equipped with cameras or CCD cameras and does not have a visual window. Only the naked eye can be used to observe and search for traces of evidence. Searching is laborious, and it is inconvenient to take pictures of evidence. Especially, some very small traces of evidence cannot be identified by the naked eye. Some traces of evidence are so small that they cannot be seen by the naked eye and need to be magnified by tens or hundreds of times to be seen. SUMMARY

[0004] The utility model discloses a high multiple biological evidence discovery equipment to solve the above-mentioned problems, solve the problem that the existing biological evidence equipment is difficult to find small evidence traces and inconvenient to take materials.

[0005] To achieve the above-mentioned purpose, the technical scheme of the utility model is a high multiple biological evidence discovery equipment, which comprises:

[0006] A shell;

[0007] A display screen is installed on the shell;

[0008] A camera is vertically fixed to the inner side of the shell, and the lens of the camera faces downward. The camera has a detection area for placing evidence below it.

[0009] An objective lens is detachably fixed below the camera lens by a fixing piece.

[0010] At least one filter is located below the camera lens and between the camera and the objective lens.

[0011] An LED control circuit board has several LEDs that can emit light of different wavelengths, and the light emitted by the several LEDs converges on the area to be inspected.

[0012] A main control board is disposed inside the housing and is electrically connected to the camera, display screen and LED control circuit boards respectively;

[0013] A power board, which is electrically connected to the main control board, and is connected to an external power source.

[0014] Preferably, the bottom of the housing is provided with an LED bead fixing plate, the middle of the LED bead fixing plate has a viewport for easy camera shooting and several holes corresponding to the LED beads, and the bottom of the LED bead fixing plate is provided with a ranging sensor electrically connected to the main control board.

[0015] Preferably, the LED control circuit board includes a first LED control circuit board, a second LED control circuit board, and a third LED control circuit board. The first LED control circuit board is fixed above the LED fixing plate. There are two of each of the second and third LED control circuit boards. The two second LED control circuit boards are symmetrically arranged on the left and right sides of the upper part of the LED fixing plate, and the two third LED control circuit boards are symmetrically arranged on the front and rear sides of the upper part of the LED fixing plate.

[0016] Preferably, the fixing member has a mounting hole in the middle, the objective lens is vertically fixed in the mounting hole, and magnets are installed at both ends of the fixing member. The two ends of the fixing member are attracted to the middle area of ​​the bottom of the lamp bead fixing plate by the magnets.

[0017] Preferably, the fastener has clearance holes near both ends that correspond to the positions of the LED beads.

[0018] Preferably, the bottom of the lamp bead fixing plate is provided with a skirt along one side edge, and a light-blocking plate is fixedly installed on the outer side of the skirt.

[0019] Preferably, a frame is provided on each of the left and right sides of the inner side of the housing, and a mounting plate is provided between the two frames. The camera is vertically fixed on the mounting plate, and a protective plate is provided between the mounting plate and the filter mounting bracket. The protective plate is fixedly installed on the bottom of the mounting plate.

[0020] Preferably, two motors are vertically fixed on the mounting plate, and two filter mounting brackets are arranged vertically and parallelly below the frame. The output ends of the two motors are respectively connected to the two filter mounting brackets. Each filter mounting bracket has multiple filters arranged in the circumferential direction. The projection of the filter on one mounting bracket overlaps vertically with the projection of the filter on the other mounting bracket, and the projections of the two overlapping filters are located within the field of view of the camera.

[0021] Preferably, the inner side of the outer shell is provided with a mounting back plate, and the two ends of the mounting back plate are respectively connected to two frames. The outer back of the outer shell is provided with a bracket connecting plate, which is fixedly connected to the mounting back plate by screws. The bracket connecting plate has several mounting holes.

[0022] Preferably, an interface assembly is provided on the back of the outer side of the housing. The interface assembly includes a power interface and a USB interface. The power interface is electrically connected to the power board, and the USB interface is electrically connected to the main control board.

[0023] Its advantages over existing technologies are:

[0024] In this invention, a central control board controls the operation of various electronic components. Several LEDs are arranged on the LED control circuit board, each emitting light of a different wavelength. The appropriate wavelength can be selected based on requirements. The emitted light illuminates the physical evidence located in the area to be tested below. Under the illumination of a specific wavelength spectrum, the physical evidence undergoes a fluorescence reaction, revealing the biological samples. The camera can capture images of the biological samples through a filter and upload the images to a display screen for direct observation during evidence collection. The objective lens magnifies the image, and the combination of the camera and objective lens can magnify the target by tens or hundreds of times, meeting the needs for magnified evidence collection of various biological samples such as saliva stains, semen stains, urine stains, blood stains, hair, bones, teeth, and exfoliated cells. Furthermore, the camera and display screen work together to achieve visualization, allowing direct observation and searching of evidence traces through the display screen, making the collection of physical evidence relatively convenient. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the high-magnification biological sample detection device of this utility model;

[0026] Figure 2 This is a schematic diagram of the bottom structure of a high-magnification biological sample detection device;

[0027] Figure 3 This is a schematic diagram of the high-magnification biological sample detection equipment when the light-blocking plate is removed;

[0028] Figure 4 This is a schematic diagram of the back structure of the high-magnification biological sample detection equipment when the light-blocking plate is removed;

[0029] Figure 5 This is a schematic diagram of the bottom structure of the high-magnification biological sample detection equipment when the light-blocking plate is removed;

[0030] Figure 6 This is a schematic diagram of the high-magnification biological sample detection equipment when the light-blocking plate and outer shell are removed;

[0031] Figure 7 yes Figure 6 Another structural diagram from a different perspective;

[0032] Figure 8 This is a schematic diagram of the high-magnification biological sample detection equipment after removing the light-blocking plate, outer shell, frame, and installing the back plate;

[0033] Figure 9 yes Figure 8 Another structural diagram from a different perspective;

[0034] Figure 10 This is a structural diagram of the high-magnification biological sample detection equipment after removing the light-blocking plate, outer shell, skeleton, mounting back plate, and mounting plate;

[0035] Figure 11 This is a schematic diagram of the structure of the LED control circuit board mounted on the LED fixing plate;

[0036] Figure 12 This is a schematic diagram of the objective lens mounted on the fixture.

[0037] In the diagram: 1. Housing; 101. Switch; 102. Handle; 103. Inspection area; 2. Display screen; 3. Interface assembly; 31. Power interface; 32. USB interface; 4. Bracket connecting plate; 5. Lamp bead fixing plate; 6. Lamp bead; 7. Distance sensor; 8. Camera; 9. Mounting plate; 10. Main control board; 11. Power board; 12. Frame; 13. Mounting back plate; 14. Protective plate; 15. Motor; 16. Filter mounting bracket; 17. Filter; 18. Lamp bead control circuit board; 181. First lamp bead control circuit board; 182. Second lamp bead control circuit board; 183. Third lamp bead control circuit board; 19. Objective lens; 20. Fixture; 201. Clearance hole; 21. Skirt; 22. Light shield; 23. Magnet. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0039] like Figures 1-7 As shown, a preferred embodiment of this utility model proposes a high-magnification biological sample detection device. This desktop biological sample machine mainly includes a shell 1, a display screen 2, a camera 8, an objective lens 19, a main control board 10, an LED control circuit board 18, a power board 11, a motor 15, a frame 12, a mounting back plate 13, a filter 17, and a filter mounting bracket 16. The shell 1 has a cavity inside, and the camera 8, main control board 10, LED control circuit board 18, power board 11, motor 15, frame 12, mounting back plate 13, filter 17, and filter mounting bracket 16 are all installed in this cavity.

[0040] Two frames 12 are provided and are symmetrically installed on both sides of the inner side of the outer shell 1. The mounting back plate 13 is installed on the back side of the inner side of the outer shell 1. The two ends of the mounting back plate 13 are fixedly connected to the two frames 12 by screws respectively. A lamp bead fixing plate 5 is installed at the bottom of the outer shell 1. The lower side of the frames 12 and the mounting back plate 13 are fixedly connected to the lamp bead fixing plate 5 by screws. In this way, the mounting back plate 13 and the two frames 12 together form a stable frame structure, which can play a supporting role and strengthen the structural strength of the outer shell 1.

[0041] refer to Figures 6-8 The mounting plate 9 is located between the two frames 12, and both ends of the mounting plate 9 are fixedly connected to the two frames 12 by screws. Two motors 15 are provided, vertically fixed to the mounting plate 9 near both ends. Two circular filter mounting brackets 16 are provided. The two filter mounting brackets 16 are arranged vertically in parallel and are fixedly connected to the output ends of the two motors 15, which control the rotation of the two filter mounting brackets 16 respectively.

[0042] refer to Figure 10 Several circular holes are formed around the circumference of the filter mounting bracket 16, and a filter 17 is installed in each hole. The specifications of the filters 17 in different holes are different. There is a partial overlap between the two filter mounting brackets 16. In the overlapping area, the projection of a filter 17 on one filter mounting bracket 16 overlaps vertically with the projection of a filter 17 on the other filter mounting bracket 16. In this way, the lens of the camera 8 can capture images of the biological sample below through the two superimposed filters 17.

[0043] The function of filter 17 is to protect the camera lens 8, eliminate or reduce reflections in light, improve image quality, adjust color temperature, achieve special effects, and change image tone. Two motors 15 control the rotation of two filter mounting brackets 16 respectively, switching between different filters 17. When the filters 17 on the two filter mounting brackets 16 are used together, dozens of different combination schemes can be extended for selection.

[0044] Camera 8 is vertically fixed on mounting plate 9, and is positioned directly above two overlapping filters 17. The lens of camera 8 faces downwards, allowing it to capture images of the biological sample below through the two overlapping filters 17.

[0045] refer to Figures 9-11 The lamp bead fixing plate 5 has a rectangular hole in the middle so that the camera 8 can capture images of the biological sample below through the rectangular hole. The bottom surface of the lamp bead fixing plate 5 has five faces, which are joined together to form a frustum-shaped cone. The upper part of the lamp bead fixing plate 5 is also frustum-shaped, and it also has five faces. Each face has several holes, and each hole corresponds one-to-one with the lamp bead 6 on the lamp bead control circuit board 18, so that the light emitted by the lamp bead 6 can pass through the holes and illuminate the evidence placed in the examination area 103 below, thus revealing the biological sample on the evidence.

[0046] like Figure 11 As shown, the LED control circuit board 18 includes a first LED control circuit board 181, a second LED control circuit board 182, and a third LED control circuit board 183. Two second LED control circuit boards 182 and two third LED control circuit boards 183 are provided. The two second LED control circuit boards 182 are respectively mounted and fixed on the left and right sides of the upper part of the LED fixing plate 5, and the three third LED control circuit boards 183 are respectively mounted and fixed on the front and rear sides of the upper part of the LED fixing plate 5. The first LED control circuit board 181 is mounted and fixed on the plane in the middle of the LED fixing plate 5. The first LED fixing plate 5 also has a rectangular hole in the middle to prevent obstruction of the camera 8's field of view.

[0047] Each LED control circuit board 18 has several LEDs 6. Each LED 6 emits light with a different wavelength, and the color of the light will also be different depending on the wavelength. Therefore, when the biological sample on the physical evidence is illuminated, the color of the fluorescence reaction will also be different.

[0048] like Figure 3 , Figure 11As shown, there is an inspection area 103 below the LED bead fixing plate 5, the size of which is the field of view of the camera 8. Several LED beads 6 on the first LED bead control circuit board 181 are evenly distributed circumferentially around the central rectangular hole, and the LED beads 6 of corresponding wavelengths are centrally symmetrically distributed along the center of the rectangular hole. The LED beads 6 on the two second LED bead control circuit boards 182 have the same structure, but the two second LED bead control circuit boards 182 are also centrally symmetrically distributed along the center of the rectangular hole. Similarly, the LED beads 6 on the two third LED bead control circuit boards 183 have the same structure, and the two third LED bead control circuit boards 183 are also centrally symmetrically distributed along the center of the rectangular hole.

[0049] Since the second LED control circuit board 182 and the third LED control circuit board 183 are both mounted on the inclined surface, and the LEDs 6 on the second LED control circuit board 182 and the third LED control circuit board 183 are centrally symmetrically distributed, the light emitted by the corresponding wavelength LEDs 6 on each LED control circuit board 18 can converge in the inspection area 103 below and directly illuminate all corners of the evidence, ensuring that the evidence is in a shadowless environment when biological trace evidence is discovered, which is conducive to the discovery of evidence traces.

[0050] like Figure 12 As shown, objective lens 19 is mounted and fixed to the bottom of fixture 20. Fixture 20 has a circular mounting hole in the center for mounting objective lens 19. Objective lens 19 is fixed to the lamp bead fixing plate 5 below the rectangular hole in the center, concentric with camera 8, and located directly below camera 8. Objective lens 19 is a high-magnification lens. The magnification of camera 8 itself and objective lens 19 are combined, which can magnify the target by tens or hundreds of times, and can magnify extremely fine biological samples.

[0051] Two magnets 23 are provided at each end of the upper part of the fixing member 20. The fixing member 20 is attracted to the middle position of the bottom of the lamp bead fixing plate 5 by the magnets 23, which allows the objective lens 19 to be installed quickly and facilitates installation and removal. In other technical solutions, the fixing member 20 can also be snapped into the bottom of the lamp bead fixing plate 5.

[0052] Two clearance holes 201 are provided near both ends of the fastener 20. The position of the clearance holes 201 corresponds to the position of the lamp 6 on the first lamp control circuit board 181, so that the light emitted by the lamp 6 can pass through the clearance holes 201 and illuminate the physical evidence below.

[0053] like Figure 2As shown, a U-shaped skirt 21 is fixedly installed at the bottom of the LED bead fixing plate 5 with screws. The skirt 21 extends along the edge of the bottom of the LED bead fixing plate 5. A light-blocking plate 22 is installed around the skirt 21. The light-blocking plate 22 can surround three sides to block light and prevent interference from other external light.

[0054] like Figure 6 As shown, the main control board 10 and the power supply board 11 are both installed inside the housing 1. The five LED control circuit boards 18 are all electrically connected to the main control board 10. The main control board 10 is the main control circuit board, which can process and analyze data and control the operation of other electronic components.

[0055] like Figure 4 As shown, a protective plate 14 is also installed at the bottom of the mounting plate 9. The protective plate 14 is located above the lamp bead control circuit board 18 and serves to protect the lamp bead control circuit board 18.

[0056] like Figure 1 , Figure 4 As shown, the power board 11 and the display screen 2 are also electrically connected to the main control board 10. The display screen 2 is installed on the front of the housing 1. The display screen 2 is a touch screen 2, which can be used to select and switch different filter 17 matching schemes and select the lamp beads 6 that can emit light of the corresponding wavelength.

[0057] refer to Figure 2 On the back of the outer casing 1, there is also an interface assembly 3. This interface assembly 3 mainly includes a power interface 31 and a USB interface 32. The power interface 31 is electrically connected to the power board 11. The power interface 31 is connected to an external power source, and the power board 11 automatically distributes the voltage to different electronic devices. The USB interface 32 is electrically connected to the main control board 10. The USB interface 32 can be connected to external electronic products such as computers, and signals can be transmitted to the computer through the USB interface 32 so that the window displayed on the display screen 2 can be projected onto the computer.

[0058] like Figure 3 As shown, a distance sensor 7 electrically connected to the main control board 10 is provided at each of the four corners at the bottom of the LED bead fixing plate 5. The distance sensor 7 can detect the distance between itself and the physical evidence below in real time, so as to adjust the distance between the camera 8 and the physical evidence, so that the camera 8 can clearly capture the physical evidence below.

[0059] refer to Figure 2 , Figure 5 A bracket connecting plate 4 is also installed on the back of the outer shell 1. The bracket connecting plate 4 is fixedly connected to the mounting back plate 13 on the inner side of the outer shell 1 by screws. The bracket connecting plate 4 has several mounting holes so that the desktop biological sample machine can be fixedly installed on a certain device.

[0060] like Figure 1 As shown, for ease of gripping, a handle 102 is installed on each of the left and right sides of the outer shell 1. The handles 102 are fixed to the frame 12 by screws. People can manually hold the handles 102 on both sides to move the desktop biological sample machine.

[0061] A switch 101 is also provided on the top of the outer casing 1. The switch 101 is electrically connected to the main control board 10 and is used to turn the desktop biological sample machine on or off.

[0062] During the process, the physical evidence is placed in the inspection area 103 below. Then, the user manually touches the display screen 2 to select the corresponding filter 17 combination scheme and the LED bead 6 that can emit light of the corresponding wavelength. The light of the corresponding wavelength emitted by the LED bead 6 will directly illuminate all surfaces of the physical evidence. Utilizing the principle that fluorescence reaction will be excited under the illumination of a specific wavelength spectrum, the biological samples on the physical evidence will be revealed. Then, the camera 8 will take a picture of the physical evidence below, and the image will be uploaded to the display screen 2 for display. During the evidence collection, the user can directly observe the display screen 2 to collect the evidence.

[0063] Since there are many different options, it is sometimes difficult to determine which combination of filter 17 and LED 6 will produce the best image quality. Therefore, the system can automatically test all the filter 17 combinations and LED 6 selection options in turn and display the images on the display screen 2. Then, the user can manually select the best image quality option based on the images on the display screen 2.

[0064] The above technical solution only embodies the preferred technical solution of this utility model. Any changes that may be made by those skilled in the art to certain parts of it embody the principle of this utility model and fall within the protection scope of this utility model.

Claims

1. A high-magnification biological sample detection device, characterized in that, include: Outer shell (1); Display screen (2), which is mounted on housing (1); Camera (8), the camera (8) is vertically fixed inside the housing (1), and the lens of the camera (8) faces downward. There is an inspection area (103) for placing the sample directly below the camera (8). Objective lens (19), which is detachably fixed below the lens of the camera (8) by means of fastener (20); At least one filter (17) is located below the lens of the camera (8) and between the camera (8) and the objective lens (19); The lamp bead control circuit board (18) has several lamp beads (6) that can emit light of different wavelengths, and the light emitted by the several lamp beads (6) converges in the area to be inspected (103). The main control board (10) is located inside the housing (1) and is electrically connected to the camera (8), the display screen (2) and the lamp control circuit board (18) respectively. A power board (11) is electrically connected to the main control board (10) and is connected to an external power source.

2. The high-magnification biological sample detection device according to claim 1, characterized in that, The bottom of the outer casing (1) is provided with a lamp bead fixing plate (5). The middle of the lamp bead fixing plate (5) has a viewport for easy shooting by the camera (8) and several holes corresponding to the lamp beads (6). The bottom of the lamp bead fixing plate (5) is provided with a distance measuring sensor (7) electrically connected to the main control board (10).

3. The high-magnification biological sample detection device according to claim 2, characterized in that, The lamp bead control circuit board (18) includes a first lamp bead control circuit board (181), a second lamp bead control circuit board (182), and a third lamp bead control circuit board (183). The first lamp bead control circuit board (181) is fixed above the lamp bead fixing plate (5). There are two of each of the second lamp bead control circuit boards (182) and the third lamp bead control circuit board (183). The two second lamp bead control circuit boards (182) are symmetrically arranged on the left and right sides of the upper part of the lamp bead fixing plate (5), and the two third lamp bead control circuit boards (183) are symmetrically arranged on the front and rear sides of the upper part of the lamp bead fixing plate (5).

4. The high-magnification biological sample detection device according to claim 2, characterized in that, The fixing member (20) has a mounting hole in the middle, and the objective lens (19) is vertically fixed in the mounting hole. Magnets (23) are installed at both ends of the fixing member (20), and the two ends of the fixing member (20) are attracted to the middle area of ​​the bottom of the lamp bead fixing plate (5) by the magnets (23).

5. The high-magnification biological sample detection device according to claim 4, characterized in that, The fastener (20) has clearance holes (201) near both ends, which correspond to the positions of the lamp beads (6).

6. The high-magnification biological sample detection device according to claim 2, characterized in that, The bottom of the lamp bead fixing plate (5) is provided with a skirt (21) along one side edge, and a light-blocking plate (22) is fixedly installed on the outside of the skirt (21).

7. The high-magnification biological sample detection device according to claim 1, characterized in that, A frame (12) is provided on each of the left and right sides of the inner side of the outer shell (1), and a mounting plate (9) is provided between the two frames (12). The camera (8) is vertically fixed on the mounting plate (9). A protective plate (14) is provided between the mounting plate (9) and the filter mounting bracket (16). The protective plate (14) is fixedly installed on the bottom of the mounting plate (9).

8. The high-magnification biological sample detection device according to claim 7, characterized in that, Two motors (15) are vertically fixed on the mounting plate (9). Two filter mounting brackets (16) are arranged in parallel vertically below the frame (12). The output ends of the two motors (15) are connected to the two filter mounting brackets (16) respectively. Each filter mounting bracket (16) has multiple filters (17) in its circumferential direction. The projection of the filter (17) on one mounting bracket overlaps the projection of the filter (17) on the other mounting bracket, and the projections of the two overlapping filters (17) are located within the field of view of the camera (8).

9. The high-magnification biological sample detection device according to claim 8, characterized in that, The inner side of the outer shell (1) is provided with a mounting back plate (13), and the two ends of the mounting back plate (13) are respectively connected to two frames (12). The back side of the outer shell (1) is provided with a bracket connecting plate (4), and the bracket connecting plate (4) is fixedly connected to the mounting back plate (13) by screws. The bracket connecting plate (4) has several mounting holes.

10. The high-magnification biological sample detection device according to claim 9, characterized in that, An interface assembly (3) is provided on the back side of the outer shell (1). The interface assembly (3) includes a power interface (31) and a USB interface (32). The power interface (31) is electrically connected to the power board (11), and the USB interface (32) is electrically connected to the main control board (10).

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