Handwriting 3D profile measuring device distance-lifting structure

Abstract

The utility model provides a kind of handwriting 3D contour measurement equipment fixed-distance lifting structure, comprising: shell body, and the rack being set in shell body;Lifting platform, including setting on the lifting mechanism of rack, and setting on the detection platform of lifting mechanism;Handwriting scanning device, including setting above the laser scanning module of rack, laser scanning module is used to scan and identify handwriting sample placed on detection platform;Distance sensing device, including distance sensor and adjusting unit, distance sensor is set on handwriting scanning device, for detecting the distance between laser scanning module and handwriting sample on detection platform, adjusting unit is used to accept the signal of distance sensor and control lifting mechanism lifting and then fixedly adjust the distance between laser scanning module and handwriting sample on detection platform, improve the accuracy and reliability of identification result.

Description

Technical Field

[0001] This utility model relates to a fixed-distance lifting structure for a handwriting 3D contour measuring device. Background Technology

[0002] Handwriting identification (also known as handwriting examination or writer identification) is an important branch of forensic science. It involves systematically comparing two or more handwriting materials to determine whether they were written by the same person, providing evidence for investigation, trial, and civil disputes. However, handwriting identification by experts is time-consuming and resource-intensive. Therefore, automated equipment can now be used for handwriting identification by scanning the 3D contour of the handwriting, which can improve the identification efficiency. However, in existing handwriting identification equipment, the inconsistent thickness of the paper used for signing leads to errors in the 3D contour data of the scanned handwriting, affecting the accuracy of the equipment during the identification process. Therefore, to address the above problems, this utility model designs a fixed-distance lifting structure for a handwriting 3D contour measurement device. Utility Model Content

[0003] This invention provides a fixed-distance lifting structure for a handwriting 3D contour measuring device, which can effectively solve the above-mentioned problems.

[0004] This utility model is implemented as follows: A fixed-distance lifting structure for a handwriting 3D contour measuring device includes: The housing, and the frame housed within the housing; The lifting platform includes a lifting mechanism mounted on a frame and a detection platform mounted on the lifting mechanism; The handwriting scanning device includes a laser scanning module mounted on a frame, which is used to scan and identify handwriting samples placed on a detection platform. The distance sensing device includes a distance sensor and an adjustment unit. The distance sensor is mounted on the handwriting scanning device and is used to detect the distance between the laser scanning module and the handwriting sample on the detection platform. The adjustment unit is used to receive the signal from the distance sensor and control the lifting mechanism to lift and lower, thereby adjusting the distance between the laser scanning module and the handwriting sample on the detection platform.

[0005] As a further improvement, the handwriting scanning device also includes an auxiliary scanning module mounted on the side wall of the frame.

[0006] As a further improvement, the lifting mechanism includes a base plate mounted on the frame, a lifting cylinder mounted above the base plate, the lifting cylinder being connected to a scissor hinge assembly, and the scissor hinge assembly being connected to a detection platform.

[0007] As a further improvement, the scissor hinge assembly includes a sliding rod slidably connected to the base plate, a lifting cylinder connected to the middle of the sliding rod, first lifting rods connected to both sides of the sliding rod, a detection platform connected to the other end of the first lifting rods, a fixing rod provided at the end of the base plate away from the lifting cylinder, a second lifting rod connected to both ends of the fixing rod, and the detection platform connected to the other end of the second lifting rod.

[0008] As a further improvement, a front cover is provided at the front of the housing, and a dustproof window assembly is provided on the front cover. The dustproof window assembly includes a dustproof window that is slidably disposed on the front cover. A spring is connected to the side walls at both ends of the dustproof window. The other end of the spring is disposed on the top of the front cover. A magnetic block is provided at the bottom of the dustproof window. A magnetic component corresponding to the magnetic block is provided on the front cover. The magnetic block and the magnetic component are magnetically fixed together.

[0009] As a further improvement, a slider is provided on both sides of the dustproof window, and a corresponding slider is provided on the front cover, the slider being slidably disposed within the slide rail.

[0010] As a further improvement, a lighting module is provided inside the housing, and a micro switch is provided on the front cover. The micro switch is electrically connected to the lighting module. When the dustproof window touches the micro switch, the lighting module is turned off.

[0011] As a further improvement, the detection platform is provided with a scanning positioning frame corresponding to the handwriting sample.

[0012] The beneficial effects of this invention are as follows: Through real-time feedback from the distance sensor and closed-loop control of the adjustment unit, the system can automatically adjust the scanning module to the preset optimal working distance regardless of the thickness of the paper, fundamentally eliminating measurement errors caused by distance variations. The fixed working distance ensures that the field of view and resolution of the laser scanning are constant, making the 3D contour data of each scan highly consistent and comparable, improving the accuracy and reliability of the identification results. There is no need for manual height adjustment; the equipment automatically completes focusing and distance setting, reducing the technical requirements for operators and improving detection efficiency. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0014] Figure 1 This is a structural schematic diagram provided by an embodiment of the present utility model.

[0015] Figure 2 This is a schematic diagram of the internal structure of the shell provided in an embodiment of this utility model.

[0016] Figure 3 This is a schematic diagram of the dustproof window assembly structure provided in this embodiment of the utility model.

[0017] Figure 4 This is a schematic diagram of the lifting platform structure provided in an embodiment of the present utility model.

[0018] Figure 5 yes Figure 4 A magnified structural diagram of point A in the middle.

[0019] The attached diagram is labeled as follows: 10. Housing; 11. Frame; 12. Front cover; 121. Slide rail; 20. Lifting platform; 21. Lifting mechanism; 211. Base plate; 212. Lifting cylinder; 213. Scissor hinge assembly; 2131. Sliding rod; 2132. First lifting rod; 2133. Fixed rod; 2134. Second lifting rod; 22. Detection platform; 221. Scanning positioning frame; 30. Handwriting scanning device; 31. Laser scanning module; 32. Auxiliary scanning module; 40. Distance sensing device; 41. Distance sensor; 50. Dustproof window assembly; 51. Dustproof window; 511. Slider; 52. Spring; 53. Magnetic block; 54. Magnetic component; 60. Micro switch. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely to represent selected embodiments of this utility model.

[0021] In the description of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0022] Reference Figures 1-5 As shown, a fixed-distance lifting structure for a handwriting 3D contour measuring device includes: Housing 10, and frame 11 disposed within housing 10; The lifting platform 20 includes a lifting mechanism 21 mounted on the frame 11 and a detection platform 22 mounted on the lifting mechanism 21; The handwriting scanning device 30 includes a laser scanning module 31 disposed above the frame 11. The laser scanning module 31 is used to scan and identify handwriting samples placed on the detection platform 22. The distance sensing device 40 includes a distance sensor 41 and an adjustment unit. The distance sensor 41 is disposed on the handwriting scanning device 30 and is used to detect the distance between the laser scanning module 31 and the handwriting sample on the detection platform 22. The adjustment unit is used to receive the signal from the distance sensor 41 and control the lifting mechanism 21 to lift and lower, thereby adjusting the distance between the laser scanning module 31 and the handwriting sample on the detection platform 22.

[0023] Reference Figure 2 As shown, the handwriting scanning device 30 also includes an auxiliary scanning module 32 disposed on the side wall of the frame 11. The auxiliary scanning module 32 can work in conjunction with the laser scanning module 31 at the top to capture the contour information of the handwriting from different angles. This helps to build a more complete and accurate 3D model, especially for the side wall contours and deep indentations of the strokes. A single-angle scan may have shadows or occluded areas. Lateral auxiliary scanning can effectively make up for this deficiency and obtain more comprehensive three-dimensional information of the handwriting. Multi-source data fusion can provide more feature points for handwriting identification, such as the tilt angle of the strokes and the three-dimensional distribution of ink, thereby enhancing the persuasiveness of the identification conclusion.

[0024] As a further improvement, the lifting mechanism 21 includes a base plate 211 mounted on the frame 11, and a lifting cylinder 212 mounted above the base plate 211. The lifting cylinder 212 is connected to a scissor hinge assembly 213, which is connected to the detection platform 22. The scissor hinge assembly 213 is a very stable mechanical structure that can provide uniform and reliable vertical lifting, ensuring the stability of the detection platform 22 and the sample above, and avoiding shaking during scanning, which would affect data acquisition. The scissor hinge assembly 213 has a low height when retracted, which is beneficial to the overall miniaturization and compact design of the equipment.

[0025] Reference Figures 4-5 As shown, the scissor hinge assembly 213 includes a sliding rod 2131 slidably connected to the base plate 211. A lifting cylinder 212 is connected to the middle of the sliding rod 2131. First lifting rods 2132 are connected to both sides of the sliding rod 2131. The other end of the first lifting rods 2132 is connected to the detection platform 22. A fixing rod 2133 is provided at one end of the base plate 211 away from the lifting cylinder 212. A second lifting rod 2134 is connected to both ends of the fixing rod 2133. The other end of the second lifting rod 2134 is connected to the detection platform 22.

[0026] Reference Figure 3 As shown, a front cover 12 is provided at the front of the housing 10. A dustproof window assembly 50 is provided on the front cover 12. The dustproof window assembly 50 includes a dustproof window 51 that is slidably disposed on the front cover 12. A spring 52 is connected to the side walls at both ends of the dustproof window 51. The other end of the spring 52 is disposed on the top of the front cover 12. A magnetic block 53 is provided at the bottom of the dustproof window 51. A magnetic component 54 corresponding to the magnetic block 53 is provided on the front cover 12. The magnetic block 53 and the magnetic component 54 are magnetically fixed together. When not in use, the closed dustproof window 51 can prevent dust from entering the inside of the equipment and contaminating precision components such as laser scanning modules, ensuring the measurement accuracy and lifespan of the equipment during long-term use. The spring design makes it easier to push the window open, improving the user experience.

[0027] Reference Figure 3 As shown, a slider 511 is provided on both sides of the dustproof window 51, and a corresponding slider 511 is provided on the front cover 12. The slider 511 is slidably disposed in the slide rail 121, which ensures that the dustproof window 51 moves smoothly and steadily in the vertical direction without jamming or deflection, thereby improving the reliability of operation and the quality of the product.

[0028] As a further improvement, an illumination module (not shown in the figure) is provided inside the housing 10, and a micro switch 60 is provided on the front cover 12. The micro switch 60 is electrically connected to the illumination module. When the dustproof window 51 touches the micro switch 60, the illumination module is turned off. When the dustproof window 51 is closed, it means that the device is about to start scanning handwriting and automatically turns off the internal lighting. By controlling the opening and closing of the dustproof window 51, the opening and closing of the illumination module is synchronously controlled, which can prevent the influence of external light sources on handwriting scanning and identification, and prevent errors in identification results caused by the user not turning off the light source. This can improve the user experience. The purpose of setting springs 52 on both sides of the dustproof window 51 is to provide a damping effect during use, which can prevent the micro switch 60 from being damaged during the opening and closing of the dustproof window 52.

[0029] Reference Figure 2 As shown, the detection platform 22 is equipped with a scanning positioning frame 221 corresponding to the handwriting sample, which provides clear visual guidance for the user and ensures that the handwriting sample can be placed in the best position in the scanning area each time, avoiding incomplete scanning or invalid data due to improper sample placement.

[0030] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A distance-lifting structure for a handwriting 3D profile measuring apparatus, characterized by comprising: include: Housing (10), and frame (11) disposed within housing (10); The lifting platform (20) includes a lifting mechanism (21) mounted on a frame (11) and a detection platform (22) mounted on the lifting mechanism (21). The handwriting scanning device (30) includes a laser scanning module (31) disposed above the frame (11), which is used to scan and identify handwriting samples placed on the detection platform (22); The distance sensing device (40) includes a distance sensor (41) and an adjustment unit. The distance sensor (41) is mounted on the handwriting scanning device (30) and is used to detect the distance between the laser scanning module (31) and the handwriting sample on the detection platform (22). The adjustment unit is used to receive the signal from the distance sensor (41) and control the lifting mechanism (21) to lift and lower, thereby adjusting the distance between the laser scanning module (31) and the handwriting sample on the detection platform (22).

2. The distance-keeping lifting structure of a handwriting 3D profile measuring device according to claim 1, characterized in that, The handwriting scanning device (30) also includes an auxiliary scanning module (32) disposed on the side wall of the frame (11).

3. The distance-lifting structure for handwriting 3D profile measurement equipment according to claim 1, characterized in that, The lifting mechanism (21) includes a base plate (211) mounted on the frame (11), a lifting cylinder (212) mounted above the base plate (211), the lifting cylinder (212) being connected to a scissor hinge assembly (213), and the scissor hinge assembly (213) being connected to the detection platform (22).

4. The distance-keeping lifting structure of a handwriting 3D profile measuring device according to claim 3, characterized in that, The scissor hinge assembly (213) includes a sliding rod (2131) slidably connected to the base plate (211). A lifting cylinder (212) is connected to the middle of the sliding rod (2131). A first lifting rod (2132) is connected to both sides of the sliding rod (2131). The other end of the first lifting rod (2132) is connected to the detection platform (22). A fixing rod (2133) is provided at one end of the base plate (211) away from the lifting cylinder (212). A second lifting rod (2134) is connected to both ends of the fixing rod (2133). The other end of the second lifting rod (2134) is connected to the detection platform (22).

5. The distance-keeping lifting structure for handwriting 3D profile measurement equipment according to claim 1, characterized in that, A front cover (12) is provided at the front of the housing (10). A dustproof window assembly (50) is provided on the front cover (12). The dustproof window assembly (50) includes a dustproof window (51) that can be slidably disposed on the front cover (12). A spring (52) is connected to the side walls at both ends of the dustproof window (51). The other end of the spring (52) is disposed on the top of the front cover (12). A magnetic block (53) is provided at the bottom of the dustproof window (51). A magnetic component (54) corresponding to the magnetic block (53) is provided on the front cover (12). The magnetic block (53) and the magnetic component (54) are magnetically fixed together.

6. The distance-keeping lifting structure of a handwriting 3D profile measuring device according to claim 5, wherein, A slider (511) is provided on both sides of the dustproof window (51), and a slider (511) corresponding to the slider (511) is provided on the front cover (12). The slider (511) is slidably disposed in the slide rail (121).

7. The distance-keeping lifting structure of a handwriting 3D profile measuring device according to claim 6, characterized in that, A lighting module is provided inside the housing (10), and a micro switch (60) is provided on the front cover (12). The micro switch (60) is electrically connected to the lighting module. When the dustproof window (51) touches the micro switch (60), the lighting module is turned off.

8. The distance-keeping lifting structure for handwriting 3D profile measuring equipment according to claim 1, characterized in that, The detection platform (22) is equipped with a scanning positioning frame (221) corresponding to the handwriting sample.

Images