A multi-modal crime scene reconstruction simulation device

Abstract

The present application relates to crime scene simulation teaching equipment technical field, provide a kind of multimodal crime scene reconstruction simulation equipment, solve the trace consistency and repeatability of simulated trace in the problem of existing trace simulation mode.This application includes: simulation frame body;Simulation evidence, is located on the simulation frame body;Attached layer, is located below the simulation evidence;Tread simulation component, with the simulation evidence transmission connection;Attitude simulation component, with the simulation evidence transmission connection;At least two simulation capsules, are clamped between the simulation evidence and attached layer, the simulation capsule is filled with simulation liquid;Start-stop component, including sealing disc, start-stop rod and start-stop rail;By continuously or in stages adjusting the height and inclination angle of simulation evidence, students can observe and compare the liquid position, contact area, completeness, depth, shade and missing area of trace under different postures.

Description

Technical Field

[0001] This invention relates to the field of crime scene simulation teaching equipment, and in particular to a multimodal crime scene reconstruction simulation device. Background Technology

[0002] During crime scene investigation, contact marks such as shoe prints, barefoot prints, fingerprints, and palm prints are typically formed by contact between a human body or object and the object bearing the mark. Different contact postures, contact pressures, directions of movement, and the distribution of the adhering medium will cause differences in the resulting marks in terms of contact area, integrity, texture clarity, density distribution, edge morphology, and local missing parts. By discovering, extracting, and analyzing these marks, we can provide a reference for determining the movement state, contact method, and on-site activities of the suspects.

[0003] In criminal technology teaching, crime scene investigation training, and trace evidence examination experiments, it is usually necessary to pre-arrange shoe prints, fingerprints, or other contact traces to construct a simulated crime scene, so that trainees can practice operations such as trace discovery, photography, extraction, comparison, and formation mechanism analysis.

[0004] Existing methods for simulating marks mainly include manual pressing, manual stepping, and using stamps or imprinting devices to create marks. Among these, manual pressing or stepping typically involves an operator applying ink, pigment, simulated blood, or other simulated liquid to the sole of a shoe, finger, or other area where marks will be formed, and then bringing it into contact with the printing surface to create the corresponding simulated mark.

[0005] However, when manually applying the simulated liquid, the application location, thickness, and uniformity of the simulated liquid largely depend on the operator's experience. The simulated traces made by different operators or by the same operator at different times are prone to significant differences, making it difficult to guarantee consistency between multiple simulation experiments. Summary of the Invention

[0006] Therefore, there is a need to provide a multimodal crime scene reconstruction simulation device to solve the problems of poor consistency and repeatability of traces simulated in existing trace simulation methods.

[0007] To achieve the above objectives, the inventors provide a multimodal crime scene reconstruction simulation device, comprising:

[0008] Simulated frame;

[0009] Simulated evidence is placed on the simulated frame, and the simulated evidence has a length direction and a width direction;

[0010] An adhesion layer is provided below the simulated evidence, and the adhesion layer has a plurality of liquid guiding holes distributed on it;

[0011] A trampling simulation component is connected to the simulated evidence via a transmission mechanism, and is used to drive the simulated evidence to rise or fall relative to the simulated frame, so as to adjust the height of the simulated evidence.

[0012] A posture simulation component is connected to the simulated evidence via a transmission mechanism and is used to adjust the tilt angle of the simulated evidence in the length direction.

[0013] At least two simulated capsules are sandwiched between the simulated evidence and the attachment layer. The simulated capsules are filled with simulated liquid, and the simulated capsules have outlet holes that are distributed on them corresponding to each of the liquid guiding holes.

[0014] The opening and closing assembly includes a sealing disc rotatably disposed between each of the simulated capsules and the attachment layer, an opening and closing rod disposed on the side of each sealing disc, and an opening and closing rail spaced apart on one side of the simulated frame. The opening and closing rod is slidably limited within the opening and closing rail. Each of the sealing discs has arc-shaped holes corresponding to each of the liquid guiding holes, and the width of each arc-shaped hole gradually decreases from the middle to both sides.

[0015] Each of the sealing discs has a communicating position and a blocking position. In the communicating position, at least a portion of the arc-shaped hole coincides with at least a portion of the corresponding liquid outlet and liquid guide hole. In the blocking position, the arc-shaped hole is misaligned with the corresponding liquid outlet and / or liquid guide hole.

[0016] Furthermore, when the length direction of the simulated evidence is horizontal, the middle part of each arc-shaped hole is aligned with the corresponding liquid outlet and liquid guide hole;

[0017] When the absolute value of the tilt angle of the simulated evidence in the length direction is greater than or equal to 20°, each of the arc-shaped holes is completely misaligned with the corresponding liquid outlet and / or liquid guide hole.

[0018] Furthermore, each of the liquid guiding holes is distributed on the top of the adhesion layer, and a number of contact holes for contacting the printing surface are distributed on the bottom of the adhesion layer. Each of the liquid guiding holes is connected to a number of contact holes through a liquid distribution channel provided inside the adhesion layer.

[0019] Furthermore, the simulated evidence is a shoe print or fingerprint.

[0020] Furthermore, each of the arc-shaped holes is provided with an annular block along its edge, and each of the annular blocks is provided with a sealing block at both ends. When each of the sealing discs is in the communicating position, each of the liquid outlet holes is located inside the corresponding annular block. When each of the sealing discs is in the blocking position, each of the liquid outlet holes is located at the corresponding sealing block.

[0021] Furthermore, the height of each of the sealing blocks is greater than that of each of the annular blocks, and each of the sealing blocks includes an elastic part and a sealing part disposed at the top of the elastic part.

[0022] Furthermore, the attitude simulation component includes an attitude rotation axis and an attitude drive component that is drively connected to the attitude rotation axis.

[0023] Furthermore, the posture simulation component is configured to: drive the simulated evidence to switch from a tilt angle to a horizontal angle when the simulated evidence descends, and drive the simulated evidence to switch from a horizontal angle to a tilt angle when the simulated evidence rises.

[0024] Furthermore, the trampling simulation component includes a lifting guide disposed on the simulation frame along the height direction and a lifting support slidably disposed on the lifting guide, and the posture simulation component is disposed on one side of the lifting support.

[0025] Furthermore, each of the opening and closing rods is provided with a slider at its end, and each of the opening and closing rails is provided with a groove that matches the slider. Each of the opening and closing rods includes an outer rod and an inner rod passing through the outer rod.

[0026] The above technical solution has the following advantages, unlike existing technologies:

[0027] This invention adjusts the height of the simulated evidence by using a stepping simulation component and the tilt angle of the simulated evidence along its length by using a posture simulation component. This allows for the simulation of the process of a trace-forming object approaching, contacting, and leaving the printing surface under different contact postures, thereby creating simulated traces with varying degrees of integrity, liquid-coated areas, and concentration distributions. This device combines the stepping height, tilt posture, and simulated liquid output states of the simulated evidence in different areas, improving the controllability, repeatability, and realism of crime scene trace simulation, and reducing the possibility of leakage or dripping when the simulated evidence is in a non-contact state.

[0028] Meanwhile, this application can intuitively demonstrate the influence of different contact postures on the morphology of traces on the printing surface by continuously or in stages adjusting the height and tilt angle of the simulated evidence. This allows trainees to observe and compare the liquid position, contact area, integrity, depth and concentration, and missing areas of traces under different postures, thereby understanding the correspondence between the trace formation posture and the final imprint result. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure in this embodiment;

[0030] Figure 2 This is a schematic cross-sectional view of the opening and closing component in this embodiment;

[0031] Figure 3 This is a schematic diagram of the cross-sectional structure of the sealing disc in this embodiment;

[0032] Figure 4 This is a top view of the sealing disc structure in this embodiment;

[0033] Figure 5 This is a schematic diagram of the three-dimensional structure of the sealing disc in this embodiment;

[0034] Figure 6 This is a schematic diagram of the three-dimensional structure of the adhesion layer in this embodiment;

[0035] Figure 7 This is a schematic diagram of the structure of the sealing disc switching from the blocking position to the connecting position in this embodiment.

[0036] Explanation of reference numerals in the attached figures:

[0037] 1. Simulation frame; 11. Base; 12. Support frame;

[0038] 2. Simulated evidence;

[0039] 3. Adhesion layer; 31. Liquid guiding hole; 32. Contact hole; 33. Liquid distribution channel;

[0040] 4. Footstep simulation component; 41. Lifting guide component; 42. Lifting support;

[0041] 5. Attitude simulation component; 51. Attitude rotation axis; 52. Attitude drive component;

[0042] 6. Simulated capsule; 61. Fluid outlet;

[0043] 7. Opening and closing assembly; 71. Sealing disc; 72. Opening and closing rod; 73. Opening and closing rail; 74. Arc-shaped hole; 75. Annular block; 76. Sealing block; 77. Sliding ball. Detailed Implementation

[0044] To illustrate the possible application scenarios, technical principles, implementable specific solutions, and achievable objectives and effects of this application in detail, the following description, in conjunction with the listed specific embodiments and accompanying drawings, provides a detailed explanation. The embodiments described herein are merely illustrative of the technical solutions of this application and are therefore intended to limit the scope of protection of this application.

[0045] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0046] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit this application.

[0047] In the description of this application, the term "and / or" is used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and A and B exist simultaneously. Additionally, the character " / " in this document generally indicates that the preceding and following objects have an "or" logical relationship.

[0048] In this application, terms such as “first” and “second” are used only to distinguish one entity or operation from another, and do not necessarily require or imply any actual quantity, hierarchy or order relationship between these entities or operations.

[0049] Unless otherwise specified, the use of terms such as “comprising,” “including,” “having,” or other similar expressions in this application is intended to cover non-exclusive inclusion, which does not exclude the presence of additional elements in a process, method, or product that includes the stated elements, such that a process, method, or product that includes a list of elements may include not only those defined elements but also other elements not expressly listed, or elements inherent to such a process, method, or product.

[0050] As understood in the Examination Guidelines, in this application, expressions such as "greater than," "less than," and "exceeding" are understood to exclude the stated number; expressions such as "above," "below," and "within" are understood to include the stated number. Furthermore, in the description of the embodiments in this application, "multiple" means two or more (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups" and "multiple times," unless otherwise explicitly specified.

[0051] In the description of the embodiments of this application, the space-related expressions used, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or drawings. They are only for the purpose of describing the specific embodiments of this application or for the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0052] Unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," "fixing," and "setting," as used in the description of the embodiments of this application, should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components or the interaction between two components. For those skilled in the art to which this application pertains, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0053] Example: Please refer to Figures 1 to 7 As shown, this embodiment provides a multimodal crime scene reconstruction simulation device, which is used to form simulated traces under different contact postures on the printing surface, and to show trainees the differences in the imprints formed by simulated evidence under different heights, different tilt angles and different contact processes.

[0054] This embodiment uses a simulated shoe print as an example for illustration.

[0055] The multimodal crime scene reconstruction simulation device includes a simulation frame 1, simulated evidence 2, an attachment layer 3, a trampling simulation component 4, a posture simulation component 5, at least two simulation capsules 6, and an opening and closing component 7.

[0056] The simulation frame 1 is used to support other components in the simulation equipment. The simulation frame 1 includes a base 11 and a support frame 12 disposed on the base 11. The base 11 is used to place on the ground or experimental table, and the support frame 12 extends in the height direction for mounting the stepping simulation component 4 and the opening and closing component 7.

[0057] A simulated area for placing the printing substrate is formed below the simulated frame 1. The printing substrate can be paper, ceramic tile, glass plate, metal plate, wood board, or other objects capable of bearing simulated shoe prints, with its upper surface forming the printing surface.

[0058] The simulated evidence 2 is movably mounted on the simulation frame 1. In this embodiment, the simulated evidence 2 is a shoe print forming element, the overall outline of which matches the outline of the shoe sole to be simulated. The simulated evidence 2 has a length direction and a width direction, wherein the length direction of the simulated evidence 2 extends from the heel area towards the forefoot area, and the width direction of the simulated evidence 2 is perpendicular to its length direction. In other preferred embodiments, the simulated evidence 2 is a fingerprint forming element, which is based on the same principle as the shoe print forming element given in this embodiment, the only difference being the shape and size of the simulated evidence 2, which will not be described in detail here.

[0059] The simulated evidence 2 is used to install the attachment layer 3, the simulated capsule 6, and the sealing disc 71. The simulated evidence 2 can be made of metal, engineering plastic, or composite materials to maintain structural stability when the printing surface is pressed. The side of the simulated evidence 2 is connected to the posture simulation component 5, so that the simulated evidence 2 can rotate relative to the stepping simulation component 4 to adjust the tilt angle of the simulated evidence 2 along the length direction.

[0060] The attachment layer 3 is disposed below the simulated evidence 2. The attachment layer 3 may be made of silicone, rubber or other elastic materials. The bottom surface of the attachment layer 3 has raised textures and / or recessed textures corresponding to the sole pattern to be simulated, so that the attachment layer 3 can form the corresponding sole pattern when it comes into contact with the printing surface.

[0061] The top of the adhesion layer 3 is provided with several liquid guiding holes 31, and the bottom of the adhesion layer 3 is provided with several contact holes 32 for contacting the printing surface. Each liquid guiding hole 31 is connected to several contact holes 32 through a liquid distribution channel 33 disposed inside the adhesion layer 3. The liquid distribution channel 33 may include a main channel connected to the liquid guiding hole 31 and several branch channels connected to the main channel, and each branch channel is connected to the corresponding contact hole 32. After the simulated liquid enters the adhesion layer 3 through the liquid guiding hole 31, it is dispersed and transported to multiple contact holes 32 through the liquid distribution channel 33, so that the simulated liquid can be output from multiple positions at the bottom of the adhesion layer 3.

[0062] By connecting one liquid guide hole 31 with multiple contact holes 32, the simulated liquid can be prevented from flowing out from a single location, reducing the possibility of the simulated liquid accumulating in a local area to form droplets or causing large-area smudging, and allowing the simulated liquid to be distributed more evenly in the sole texture area of ​​the adhesion layer 3.

[0063] The trampling simulation component 4 is mounted on the simulation frame 1 and is connected to the simulated evidence 2 via a transmission mechanism. It is used to drive the simulated evidence 2 to rise or fall relative to the simulation frame 1. The trampling simulation component 4 includes a lifting guide 41, a lifting support 42, and a lifting drive (not shown in the figure). The lifting guide 41 is mounted on the support frame 12 along the height direction. The lifting guide 41 can be a guide rail, a guide rod, or other components that can limit the direction of lifting movement. The lifting support 42 is slidably mounted on the lifting guide 41 and can rise or fall along the lifting guide 41. The lifting drive is mounted on the simulation frame 1 and is connected to the lifting support 42 via a transmission mechanism. It is used to drive the lifting support 42 to move along the lifting guide 41.

[0064] The lifting drive can be an electric push rod, a servo electric cylinder, a lead screw drive mechanism, a hydraulic cylinder, or a pneumatic cylinder.

[0065] The posture simulation component 5 is located on one side of the lifting support 42, and the simulated evidence 2 is mounted on the lifting support 42 through the posture simulation component 5. When the lifting drive drives the lifting support 42 to descend, the posture simulation component 5 and the simulated evidence 2 descend together with the lifting support 42, so that the simulated evidence 2 gradually approaches the printing surface. When the lifting drive drives the lifting support 42 to rise, the posture simulation component 5 and the simulated evidence 2 rise together with the lifting support 42, so that the simulated evidence 2 gradually moves away from the printing surface. The lifting guide component 41 guides the lifting support 42, which can reduce the lateral deviation or swaying of the simulated evidence 2 during the lifting process and improve the consistency of the repeated stepping position of the simulated evidence 2.

[0066] The attitude simulation component 5 is disposed on one side of the lifting support 42 and is connected to the simulated evidence 2 for adjusting the tilt angle of the simulated evidence 2 in the length direction. The attitude simulation component 5 includes an attitude rotating shaft 51 and an attitude driving component 52 connected to the attitude rotating shaft 51 for transmission. The attitude rotating shaft 51 extends along the width direction of the simulated evidence 2, and the simulated evidence 2 is rotatably disposed on the lifting support 42 through the attitude rotating shaft 51. The attitude driving component 52 is mounted on the lifting support 42 and is connected to the attitude rotating shaft 51 for transmission. The attitude driving component 52 can be a servo motor, a rotary cylinder, an electric push rod, or other driving mechanism that can drive the simulated evidence 2 to rotate around the attitude rotating shaft 51.

[0067] In this embodiment, the attitude drive 52 is a servo motor. When the attitude drive 52 drives the attitude shaft 51 to rotate, the attitude shaft 51 drives the simulated evidence 2 to rotate around its width direction, thereby changing the tilt angle of the simulated evidence 2 in the length direction.

[0068] In this embodiment, the posture simulation component 5 is configured to: drive the simulated evidence 2 to gradually switch from an inclined angle to a horizontal angle when the simulated evidence 2 descends; and drive the simulated evidence 2 to gradually switch from a horizontal angle to an inclined angle when the simulated evidence 2 rises. For example, in simulating a heel-first landing posture, in the initial stage of the descent of the simulated evidence 2, the posture drive component 52 keeps the simulated evidence 2 in an inclined state where the heel area is lower than the forefoot area. As the simulated evidence 2 continues to descend, the posture drive component 52 drives the simulated evidence 2 to gradually rotate, gradually switching the simulated evidence 2 from an inclined state to a horizontal state, thereby simulating the process of the heel first contacting the printing surface, the sole gradually flattening, and the sole fully contacting the printing surface. When the simulated evidence 2 rises, the posture drive component 52 drives the simulated evidence 2 to gradually switch from a horizontal state to an inclined state, thereby simulating the process of the sole gradually changing from full contact to partial contact and finally leaving the printing surface. In other embodiments, the forefoot area of ​​the simulated evidence 2 can also be lower than the heel area to simulate a forefoot-first landing contact posture.

[0069] Understandably, in other preferred embodiments, when the simulated evidence 2 rises or falls, the posture simulation component 5 does not change the tilt angle of the simulated evidence 2, so as to visually demonstrate the influence of different contact postures on the trace morphology on the printing surface.

[0070] At least two simulated capsules 6 are sandwiched between the simulated evidence 2 and the attachment layer 3. In this embodiment, two simulated capsules 6 are provided, respectively located in the heel area and the forefoot area of ​​the simulated evidence 2.

[0071] The simulated capsules 6 are all made of flexible materials that can undergo elastic deformation, preferably silicone rubber or TPU. They are filled with simulated liquid, which can be simulated blood, washable pigment, colored aqueous solution, oily simulated liquid, or other safe liquids that can form visible marks on the printing surface. Furthermore, a constant pressure reservoir (not shown in the figure) can be provided for storing the simulated liquid and connected to each simulated capsule 6 through a one-way valve to maintain the hydraulic stability inside the simulated capsule 6.

[0072] Each simulated capsule 6 has several liquid outlet holes 61 on the side facing the adhesion layer 3. Each liquid outlet hole 61 is corresponding to the corresponding liquid guiding hole 31 on the adhesion layer 3. When the simulated evidence 2 contacts the printing surface and continues to descend, the adhesion layer 3 is subjected to the reaction force of the printing surface, causing the simulated capsule 6 to be squeezed between the main body of the forming piece and the adhesion layer 3. After the simulated capsule 6 is squeezed, the pressure of the simulated liquid inside it increases. When the corresponding liquid flow path is in a connected state, the simulated liquid can be discharged from the liquid outlet hole 61 and enter the adhesion layer 3.

[0073] The opening and closing assembly 7 is used to control the connection or blockage of the liquid flow path between the simulated capsule 6 and the attachment layer 3. The opening and closing assembly 7 includes a sealing disc 71, an opening and closing rod 72, an opening and closing rail 73, an arc-shaped hole 74, an annular block 75, a sealing block 76, and a sliding ball 77.

[0074] Specifically, each sealing disc 71 is rotatably mounted on the lower side of the main body of the forming component via a rotating shaft, so that the sealing disc 71 is located between the corresponding simulated capsule 6 and the attachment layer 3, and can rotate relative to the simulated capsule 6 and the attachment layer 3; each sealing disc 71 is provided with a number of arc-shaped holes 74, each arc-shaped hole 74 is respectively provided with the liquid outlet hole 61 of the corresponding simulated capsule 6 and the liquid guiding hole 31 of the attachment layer 3, the arc-shaped holes 74 extend in an arc shape along the rotation direction of the sealing disc 71, and the width of each arc-shaped hole 74 gradually decreases from the middle to both ends along its arc-shaped extension direction.

[0075] The sealing disc 71 has a communicating position and a blocking position. When the sealing disc 71 is in the communicating position, at least a portion of the arc-shaped hole 74 simultaneously coincides with at least a portion of the corresponding liquid outlet hole 61 and liquid guide hole 31, so that the interior of the simulated capsule 6 is connected to the liquid distribution channel 33 inside the adhesion layer 3 in sequence through the liquid outlet hole 61, the arc-shaped hole 74 and the liquid guide hole 31. When the sealing disc 71 is in the blocking position, the arc-shaped hole 74 is misaligned with the corresponding liquid outlet hole 61 and / or liquid guide hole 31 to block the liquid flow path between the simulated capsule 6 and the adhesion layer 3.

[0076] When the simulated evidence 2 is horizontal along its length, the middle of each arc-shaped hole 74 is aligned with the corresponding liquid outlet 61 and liquid guide hole 31. Since the middle width of the arc-shaped hole 74 is relatively large, there is a large overlap area between the arc-shaped hole 74, the liquid outlet 61, and the liquid guide hole 31. As the simulated evidence 2 gradually tilts along its length, the sealing disk 71 rotates under the action of the opening and closing assembly 7, causing the liquid outlet 61 and the liquid guide hole 31 to gradually align from the middle of the arc-shaped hole 74 to the narrower end region of the arc-shaped hole 74. The overlap area of ​​the three gradually decreases. When the absolute value of the tilt angle of the simulated evidence 2 in the length direction is greater than or equal to 20°, the arc-shaped hole 74 is completely misaligned with the corresponding liquid outlet 61 and / or liquid guide hole 31, and the sealing disk 71 is in the blocking position. Therefore, the flow cross-sectional area of ​​the simulated liquid flow path can gradually increase or decrease with the change in the posture of the simulated evidence 2.

[0077] Each arc-shaped hole 74 has an annular block 75 along its edge. The annular block 75 surrounds the corresponding arc-shaped hole 74 and protrudes from the sealing plate 71 toward the simulated capsule 6. When the sealing plate 71 is in the connected position, the corresponding liquid outlet 61 is located within the area enclosed by the annular block 75. After the simulated liquid is discharged from the liquid outlet 61, it is confined within the area enclosed by the annular block 75 and flows through the guide hole 31 through the arc-shaped hole 74, thereby reducing the possibility of the simulated liquid spreading to other locations along the surface of the sealing plate 71 or flowing into adjacent liquid flow paths.

[0078] Each annular block 75 has a sealing block 76 at both ends. The height of the sealing block 76 is greater than the height of the annular block 75. Each sealing block 76 includes an elastic part and a sealing part disposed at the top of the elastic part. In this embodiment, the elastic part and the sealing part are not separately labeled. When the sealing disc 71 is in the blocking position, the corresponding liquid outlet 61 is located at the sealing block 76, and the sealing part abuts against the liquid outlet 61 or the periphery of the liquid outlet 61 to close the liquid outlet 61. Since the height of the sealing block 76 is greater than the height of the annular block 75, when the sealing disc 71 rotates to the blocking position, the sealing part can preferentially contact the lower surface of the simulated capsule 6 and form a certain pressing effect on the liquid outlet 61. The elastic part can undergo elastic deformation to compensate for manufacturing and assembly errors between the simulated capsule 6, the sealing disc 71, and the liquid outlet 61, thereby improving the sealing effect in the blocking position.

[0079] Each sealing disc 71 has an opening / closing rod 72 on its side. The opening / closing rod 72 extends radially outward along the corresponding sealing disc 71. The opening / closing rod 72 includes an outer rod and an inner rod that slides through the outer rod, allowing the opening / closing rod 72 to extend or shorten along its length. A slider 77 is provided at the end of the opening / closing rod 72 away from the sealing disc 71. Opening / closing rails 73 are fixedly installed on one side of the simulation frame 1 and are spaced apart from the simulated evidence 2. The number of opening / closing rails 73 corresponds to the number of sealing discs 71. Each opening / closing rail 73 has a groove that matches the slider 77, and each slider 77 slides within the groove of the corresponding opening / closing rail 73.

[0080] As the simulated evidence 2 gradually changes from an inclined state to a horizontal state, the sealing disc 71, driven by the opening and closing rod 72, gradually rotates from the blocking position to the connecting position; conversely, as the simulated evidence 2 gradually changes from a horizontal state to an inclined state, the sealing disc 71, driven by the opening and closing rod 72, gradually rotates from the connecting position to the blocking position. The opening and closing rod 72 employs a telescopic structure composed of an outer rod and an inner rod, which can adapt to changes in the distance between the sealing disc 71 and the opening and closing rail 73 when the simulated evidence 2 is raised, lowered, or tilted. The sliding ball 77 engages with the groove of the opening and closing rail 73, reducing the frictional resistance during the movement of the opening and closing rod 72.

[0081] Finally, it should be noted that although the above embodiments have been described in the text and drawings of this application, this should not limit the scope of patent protection of this application. Any technical solutions that are based on the essential concept of this application and utilize the content described in the text and drawings of this application, resulting in equivalent structural or procedural substitutions or modifications, as well as the direct or indirect application of the technical solutions of the above embodiments to other related technical fields, are all included within the scope of patent protection of this application.

Claims

1. A multimodal crime scene reconstruction simulation device, characterized in that, include: Simulated frame; Simulated evidence is placed on the simulated frame, and the simulated evidence has a length direction and a width direction; An adhesion layer is provided below the simulated evidence, and the adhesion layer has a plurality of liquid guiding holes distributed on it; A trampling simulation component is connected to the simulated evidence via a transmission mechanism, and is used to drive the simulated evidence to rise or fall relative to the simulated frame, so as to adjust the height of the simulated evidence. A posture simulation component is connected to the simulated evidence via a transmission mechanism and is used to adjust the tilt angle of the simulated evidence in the length direction. At least two simulated capsules are sandwiched between the simulated evidence and the attachment layer. The simulated capsules are filled with simulated liquid, and the simulated capsules have outlet holes that are distributed on them corresponding to each of the liquid guiding holes. The opening and closing assembly includes a sealing disc rotatably disposed between each of the simulated capsules and the attachment layer, an opening and closing rod disposed on the side of each sealing disc, and an opening and closing rail spaced apart on one side of the simulated frame. The opening and closing rod is slidably limited within the opening and closing rail. Each of the sealing discs has arc-shaped holes corresponding to each of the liquid guiding holes, and the width of each arc-shaped hole gradually decreases from the middle to both sides. Each of the sealing discs has a communicating position and a blocking position. In the communicating position, at least a portion of the arc-shaped hole coincides with at least a portion of the corresponding liquid outlet and liquid guide hole. In the blocking position, the arc-shaped hole is misaligned with the corresponding liquid outlet and / or liquid guide hole.

2. The simulation device according to claim 1, characterized in that: When the length of the simulated evidence is horizontal, the middle part of each arc-shaped hole is aligned with the corresponding liquid outlet and liquid guide hole; When the absolute value of the tilt angle of the simulated evidence in the length direction is greater than or equal to 20°, each of the arc-shaped holes is completely misaligned with the corresponding liquid outlet and / or liquid guide hole.

3. The simulation device according to claim 1, characterized in that: Each of the liquid guiding holes is distributed on the top of the adhesion layer, and a number of contact holes for contacting the printing surface are distributed on the bottom of the adhesion layer. Each of the liquid guiding holes is connected to a number of contact holes through a liquid distribution channel provided inside the adhesion layer.

4. The simulation device according to claim 1, characterized in that: The simulated evidence is a shoe print or fingerprint.

5. The simulation device according to claim 1, characterized in that: Each of the arc-shaped holes has an annular block along its edge, and each of the annular blocks has a sealing block at both ends. When each of the sealing discs is in the communicating position, each of the liquid outlet holes is located inside the corresponding annular block. When each of the sealing discs is in the blocking position, each of the liquid outlet holes is located at the corresponding sealing block.

6. The simulation device according to claim 5, characterized in that: The height of each of the sealing blocks is greater than that of each of the annular blocks, and each of the sealing blocks includes an elastic part and a sealing part disposed at the top of the elastic part.

7. The simulation device according to claim 1, characterized in that: The attitude simulation component includes an attitude rotation axis and an attitude drive component that is driven by the attitude rotation axis.

8. The simulation device according to claim 7, characterized in that, The posture simulation component is configured to: drive the simulated evidence to switch from a tilt angle to a horizontal angle when the simulated evidence is descending, and drive the simulated evidence to switch from a horizontal angle to a tilt angle when the simulated evidence is rising.

9. The simulation device according to claim 1, characterized in that: The trampling simulation component includes a lifting guide disposed on the simulation frame along the height direction and a lifting support slidably disposed on the lifting guide, and the posture simulation component is disposed on one side of the lifting support.

10. The simulation device according to claim 1, characterized in that: Each of the opening and closing rods is provided with a slider at its end, and each of the opening and closing rails is provided with a sliding groove that matches the slider. Each of the opening and closing rods includes an outer rod and an inner rod that passes through the outer rod.

Images