Optical mechanical scanning device and optical mechanical scanning imaging system

Abstract

The present application provides an optical scanning device and an optical scanning imaging system, the optical scanning device includes: a driving mechanism, a movable drum bracket and a double-sided reflector, the driving mechanism is connected to the movable drum bracket, the movable drum bracket is connected to the double-sided reflector, the optical scanning device is started and enters a working state through the driving mechanism, drives the servo motor to rotate, the servo motor drives the transmission mechanism to rotate, the transmission mechanism drives the movable drum bracket to rotate, the movable drum bracket drives the double-sided reflector to rotate synchronously, the above device can drive the double-sided reflector to rotate synchronously through the rotation of the movable drum bracket, the scanning speed can reach a stable state, so that the sampling data is also relatively stable, thereby improving the stability of the scanning imaging.

Description

Technical Field

[0001] The present application relates to the field of security inspection technology, and in particular to an optical-mechanical scanning device and an optical-mechanical scanning imaging system. Background Art

[0002] Millimeter waves are electromagnetic waves with a wavelength of 1 to 10 millimeters, located in the wavelength range where microwaves and far-infrared waves overlap. They have excellent penetration, reflectivity, and high spatial resolution, making them easy to detect hidden objects within clothing. Substances of concern for security inspections, such as drugs and explosives, have characteristic spectra in the millimeter wave band. Furthermore, millimeter wave imaging does not actively radiate electromagnetic waves, causing no ionization damage to the person being inspected, making it suitable for human body security imaging.

[0003] Traditional scanning methods use a fixed number of radiometer channels in a one-dimensional array, scanning and imaging a two-dimensional field of view as a mechanical structure periodically swings side to side. However, this existing method requires the mechanical structure to undergo periodic motion during the scanning process, resulting in non-uniform scanning speeds, unstable sampling data, and reduced imaging stability. Summary of the Invention

[0004] Based on this, it is necessary to provide an optical-mechanical scanning device and an optical-mechanical scanning imaging system that can scan the field of view at a uniform speed to address the above technical problems.

[0005] An optical scanning device, comprising: a driving mechanism, a roller movable bracket, and a double-sided reflective mirror, wherein the driving mechanism is connected to the roller movable bracket, and the roller movable bracket is connected to the double-sided reflective mirror;

[0006] The driving mechanism is used to drive the movable roller bracket to rotate;

[0007] The movable drum bracket is used to support the double-sided reflective mirror and drive the double-sided reflective mirror to rotate around the rotating shaft of the movable drum bracket;

[0008] The double-sided reflective mirror is arranged on the movable drum bracket. The double-sided reflective mirror includes a first reflective surface and a second reflective surface. The first reflective surface and the second reflective surface are arranged back to back. The first reflective surface is parallel to the rotating axis of the movable drum bracket, and the second reflective surface forms an angle with the first reflective surface.

[0009] In one embodiment, the double-sided reflector includes a first reflector and a second reflector, the first reflector and the second reflector form the included angle, the first reflector has the first reflective surface, and the second reflector has the second reflective surface.

[0010] In one embodiment, the first reflector is fixed on the rotating shaft, and the second reflector includes a first end and a second end opposite to each other, the first end is supported on the rotating shaft, and the second end extends at the angle in a direction away from the rotating shaft.

[0011] In one embodiment, the double-sided reflector further includes a hinge, and the second reflector is connected to the first reflector via the hinge; wherein one end of the first reflector is connected to the first end of the second reflector via the hinge.

[0012] In one embodiment, the double-sided reflector further includes a mirror rotation shaft; the mirror rotation shaft fixes the hinge, and the second reflector is rotatable around the mirror rotation shaft.

[0013] In one embodiment, the double-sided reflector further includes a fixing block and a pin; the fixing block is arranged at the other end of the first reflector, and the pin is arranged at the second end of the second reflector.

[0014] In one embodiment, the double-sided reflector further includes an adjusting rod, a sliding block and a hinged rod, the adjusting rod is connected to the fixed block, the sliding block is connected to the pin through the hinged rod, the sliding block is arranged on the adjusting rod, and can slide on the adjusting rod along the axial direction of the rotating shaft to adjust the angle between the first reflector and the second reflector; one end of the adjusting rod is fixed by the fixed block, and one end of the hinged rod is connected to the second end of the second reflector through the pin.

[0015] In one embodiment, the double-sided reflector further includes a locking nut; the locking nut is detachably connected to the adjustment rod, and after the angle between the first reflector and the second reflector is adjusted, the adjustment rod is locked by the locking nut to fix the angle.

[0016] In one embodiment, during the rotation of the movable drum bracket, the first reflector and the second reflector alternately scan the field of view.

[0017] In one embodiment, the driving mechanism includes a servo motor and a transmission mechanism;

[0018] The servo motor is connected to the transmission mechanism for driving the transmission mechanism; the transmission mechanism is connected to the rotating shaft of the roller movable bracket for driving the rotating shaft to rotate.

[0019] In one embodiment, the driving mechanism further includes a driving control module and an encoder; the driving control module is electrically connected to the servo motor to control the rotation of the servo motor; when the movable drum bracket rotates, the encoder is driven to rotate.

[0020] In one embodiment, the transmission mechanism includes a driving wheel, a driven wheel and a synchronous belt; the driving wheel and the servo motor are coaxially connected through a coupling, the driving wheel and the driven wheel are vertically connected through the synchronous belt, the driven wheel and the encoder are both installed at both ends of the rotating shaft, and the driven wheel and the encoder are coaxially connected.

[0021] In one embodiment, the device further includes a bracket, which is used to support the servo motor, the transmission mechanism and the roller movable bracket, and the bracket is also used to support the drive control module.

[0022] In one embodiment, the device further includes a fixing mechanism; the fixing mechanism is detachably connected to the bracket, and the fixing mechanism is used to fix the optical scanning device.

[0023] In one embodiment, the driving mechanism comprises:

[0024] The drive control module is used to control the working state of the optical scanning device and the speed of the servo motor, and read the information obtained by the encoder;

[0025] The servo motor drives the driving wheel to rotate in the vertical direction, wherein the rotation speed of the servo motor is greater than the rotation speed of the driving wheel; the driving wheel drives the driven wheel to rotate vertically through the synchronous belt; the driven wheel drives the roller movable bracket to rotate along the rotating shaft; the encoder is used to record the position coding information of the roller movable bracket in the vertical direction.

[0026] In one embodiment, the directness of the driving wheel is smaller than the directness of the driven wheel.

[0027] In one embodiment, the driving wheel and the driven wheel are both located on the same side of the bracket.

[0028] In one embodiment, the movable drum bracket is a cylindrical bracket, and the cylindrical surface of the cylindrical bracket is covered with a transparent film.

[0029] An optical mechanical scanning imaging system, characterized in that the system comprises the optical mechanical scanning device as described in the first aspect, and an imaging device;

[0030] The imaging device is used to obtain information obtained by the optical scanning device from scanning the field of view, and to process and form an image of the information.

[0031] The optical scanning device and optical scanning imaging system provided in this embodiment start the optical scanning device and enter the working state through the driving mechanism, drive the servo motor to rotate, the servo motor drives the transmission mechanism to rotate, the transmission mechanism drives the roller movable bracket to rotate, and the roller movable bracket drives the double-sided reflector to rotate synchronously. The above-mentioned device can drive the double-sided reflector to rotate synchronously through the rotation of the roller movable bracket, and the scanning speed can reach a stable state, so that the sampling data is also relatively stable, thereby improving the stability of the scanning imaging. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A front view schematic diagram of an optical mechanical scanning device structure provided in one embodiment of the present application;

[0033] Figure 2a A schematic diagram of the oblique structure of an optical mechanical scanning device provided in one embodiment of the present application;

[0034] Figure 2b A schematic side view of the structure of an optical mechanical scanning device provided in one embodiment of the present application;

[0035] Figure 3 A schematic diagram of the specific structure of a double-sided reflector provided in one embodiment of the present application;

[0036] Figure 4 This is a scanned image of the first reflective mirror surface and the second reflective surface provided in one embodiment of the present application;

[0037] Figure 5 A schematic top view of an optical mechanical scanning device provided in another embodiment of the present application;

[0038] Figure 6 A schematic structural diagram of an optical mechanical scanning imaging system provided in another embodiment of the present application.

[0039] Description of reference numerals:

[0040] Optical scanning device 10 Driving mechanism 100

[0041] Servo motor 110 Transmission mechanism 120

[0042] Driving wheel 121 Driven wheel 122

[0043] Synchronous belt 123 Drive control module 130

[0044] Encoder 140 Coupling 150

[0045] Roller movable bracket 200 rotating shaft 210

[0046] Double-sided reflector 300 First reflective surface 310

[0047] First reflecting mirror 310a Second reflecting surface 320

[0048] Second reflector 320a hinge 301

[0049] Mirror shaft 302 fixed block 303

[0050] Pin 304 Adjustment rod 305

[0051] Sliding block 306 Articulated rod 307

[0052] Locking nut 308 Bracket 400

[0053] Fixing mechanism 500 Imaging device 20

[0054] Optical scanning imaging system 30 DETAILED DESCRIPTION

[0055] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0056] The terms "connection" and "coupling" mentioned in this application include direct and indirect connections (couplings) unless otherwise specified. In the description of this application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing this application and simplifying the description. They do not indicate or imply that the devices or elements referred to must have a specific direction, be constructed and operate in a specific direction, and therefore should not be understood as limiting this application.

[0057] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0058] This embodiment provides an optical scanning device 10 , including a driving mechanism 100 , a movable roller bracket 200 , and a double-sided reflective mirror 300 . The driving mechanism 100 is connected to the movable roller bracket 200 , and the movable roller bracket 200 is connected to the double-sided reflective mirror 300 .

[0059] The driving mechanism 100 is used to drive the movable roller bracket 200 to rotate;

[0060] The movable drum support 200 is used to support the double-sided reflective mirror 300 and drive the double-sided reflective mirror 300 to rotate around the rotating shaft 210 of the movable drum support;

[0061] The double-sided reflective mirror 300 is arranged on the movable drum bracket 200. The double-sided reflective mirror 300 includes a first reflective surface 310 and a second reflective surface 320. The first reflective surface 310 and the second reflective surface 320 are arranged back to back. The first reflective surface 310 is parallel to the rotating shaft 210 of the movable drum bracket, and the second reflective surface 320 forms an angle θ with the first reflective surface 310.

[0062] Please also refer to Figure 1 The driving mechanism 100 is used to provide driving force to drive the roller movable bracket 200 to rotate. The driving mechanism 100 can be a motor or other device that can provide driving force to drive the roller movable bracket 200. Optionally, the driving mechanism 100 can drive the roller movable bracket 200 to rotate at a constant speed.

[0063] Specifically, the roller movable bracket 200 may include a rotating shaft 210, and the roller movable bracket 200 may rotate with the rotating shaft 210 as the rotation axis under the drive of the driving mechanism 100. During the rotation process, the roller movable bracket 200 alternately scans the field of view through the first reflecting surface 310 and the second reflecting surface 320. Figure 2a FIG. 1 is an oblique view of the external structure of the optical scanning device 10. Figure 2bThis is a side view of the optical scanning device 10, wherein the movable roller bracket 200 may include a hub and a film covering the outer contour of the hub. The contour of the hub is cylindrical, forming a cylindrical bracket. The cylindrical surface of the cylindrical bracket may be covered with a transparent film. The transparent film may be made of plastic, adhesive, rubber or other materials, and this embodiment does not impose any restrictions on this. It should be noted that the movable roller bracket 200 can rotate in the vertical direction under the drive of the drive mechanism 100. In addition, the movable roller bracket 200 can also drive the double-sided reflector 300 to rotate at a constant speed around the rotating shaft 210. After the movable roller bracket 200 rotates one circle, it can drive the double-sided reflector 300 to scan the same field of view twice, thereby realizing time-sharing rapid switching of instantaneous scanning fields of view. The rotation angle of the movable roller bracket 200 can be 0 degrees to 360 degrees.

[0064] It is also understood that the double-sided reflector 300 is mounted on the rotating shaft 210 and can rotate synchronously with the movable drum support 200 under the drive mechanism 100. Optionally, the double-sided reflector 300 and the movable drum support 200 can rotate synchronously. Furthermore, the rotation speeds of the double-sided reflector 300 and the movable drum support 200 can be equal. Optionally, the double-sided reflector 300 can be in the form of a plane reflector, a spherical reflector, or an aspherical reflector, as long as it can reflect light incident on the double-sided reflector 300 to a designated location or area. Optionally, the two sides of the double-sided reflector 300 can be fixed to the two side surfaces of the movable drum support 200, respectively. The double-sided reflector 300 can be in the form of a polygon, as long as it has two reflective surfaces forming a certain angle. The first reflective surface 310 and the second reflective surface 320 of the double-sided reflector 300 can be two reflective surfaces of the same reflector, or they can be different reflective surfaces of two reflectors. The first reflective surface 310 of the double-sided reflector 300 may be arranged parallel to the rotation shaft 210 . Furthermore, the first reflective surface 310 may be attached to the surface of the rotation shaft 210 .

[0065] Furthermore, the first reflective surface 310 and the second reflective surface 320 form an angle θ, and the first reflective surface 310 and the second reflective surface 320 are disposed in opposite directions. The angle θ can be positive or negative. If the angle θ is positive, then the position after counterclockwise rotation by θ with the first reflective surface 310 as the rotation axis will be the angular position of the second reflective surface 320. If the angle θ is negative, then the position after clockwise rotation by θ with the first reflective surface 310 as the rotation axis will be the angular position of the second reflective surface 320.

[0066] The optical scanning device 10 provided in this embodiment can start the optical scanning device 10 through the driving mechanism 100, drive the roller movable bracket 200 to rotate at a uniform speed, and the roller movable bracket 200 drives the double-sided reflector 300 to rotate synchronously. The above-mentioned device can drive the double-sided reflector 300 to rotate synchronously at a uniform speed through the roller movable bracket 200 rolling at a uniform speed, so that the scanning speed reaches a stable state, the sampling data is also relatively stable, and the stability of the scanning imaging is improved. At the same time, the roller movable bracket 200 rotates one circle, and can scan the same field of view twice, and the two scanning results are superimposed to increase the spatial sampling density and improve the pixel resolution of the imaging.

[0067] In one embodiment, the double-sided reflector 300 includes a first reflector 310a and a second reflector 320a. The first reflector 310a and the second reflector 320a form the angle θ. The first reflector 310a has the first reflective surface 310, and the second reflector 320a has the second reflective surface 320.

[0068] Specifically, the first reflector 310a can be adhered to the rotating shaft 210 of the movable drum bracket using optical epoxy adhesive, or can be fixed to the rotating shaft 210 via a hinge. Optionally, the first reflector 310a and the rotating shaft 210 can be spaced apart and parallel to each other. The first reflector 310a and the second reflector 320a included in the double-sided reflector 300 can form an angle θ, and the angle θ can range from 0.5 degrees to 10 degrees. Optionally, the first reflector 310a and the second reflector 320a each have a reflective surface, and the two reflective surfaces can be arranged in back-to-back orientation, that is, the first reflective surface 310 on the first reflector 310a and the second reflective surface 320 on the second reflector 320a can be arranged in back-to-back orientation.

[0069] Optionally, the first reflector 310a is fixed on the rotating shaft 210, and the second reflector 320a includes a first end and a second end opposite to each other, the first end is supported on the rotating shaft 210, and the second end extends in a direction away from the rotating shaft 210 at the angle.

[0070] It should be noted that the first reflector 310a can be referred to as a fixed mirror in the double-sided reflector 300, and the second reflector 320a can be referred to as an adjustable mirror in the double-sided reflector 300. By adjusting the angular position of the second reflector 320a, the angle θ formed between the first reflector 310a and the second reflector 320a can be changed. Optionally, the first reflector 310a can be fixed to the rotating shaft 210 by welding, riveting, or bonding, which is not limited in this embodiment. Optionally, one end of the first reflector 310a is rotatably connected to the first end of the second reflector 320a, while the other end of the first reflector 310a is provided with a component capable of adjusting the angle θ, and the second end of the second reflector 320a is free.

[0071] The optical mechanical scanning device 10 provided in this embodiment has a double-sided reflector 300 including a first reflector 310a and a second reflector 320a. During the rotation of the movable drum bracket 200, the field of view is alternately scanned by the first reflector 310a and the second reflector 320a, and the results of the alternating scanning are superimposed to increase the spatial sampling density and improve the pixel resolution of the imaging.

[0072] Figure 3 This is a schematic diagram of the specific structure of a double-sided reflector 300 provided in another embodiment. The double-sided reflector 300 further includes a hinge 301, and the second reflector 320a is connected to the first reflector 310a via the hinge 301. One end of the first reflector 310a is connected to the first end of the second reflector 320a via the hinge 301.

[0073] Optionally, the double-sided reflector 300 further includes a mirror shaft 302. The mirror shaft 302 secures the hinge 301, and the second reflector 320a is rotatable about the mirror shaft 302. The double-sided reflector 300 further includes a fixed block 303 and a pin 304. The fixed block 303 is disposed at the other end of the first reflector 310a, and the pin 304 is disposed at the second end of the second reflector 320a. Optionally, the double-sided reflector 300 further includes an adjustment rod 305, a sliding block 306, and a hinge rod 307. The adjustment rod 305 is connected to the fixed block 303, and the sliding block 306 is connected to the pin 304 via the hinge rod 307. The sliding block 306 is disposed on the adjustment rod 305 and is slidable on the adjustment rod 305 along the axial direction of the shaft 210 to adjust the angle θ between the first reflector 310a and the second reflector 320a. One end of the adjustment rod 305 is fixed by the fixing block 303 , and one end of the hinge rod 307 is connected to the second end of the second reflector 320 a through the pin 304 .

[0074] Specifically, the double-sided reflector 300 may include two hinges 301, one of which may be threadedly connected to one end of the first reflector 310a; similarly, the other hinge 301 may be threadedly connected to the first end of the second reflector 320a. Optionally, the two hinges 301 may be connected via a mirror axis 302 after being snapped together. Optionally, the double-sided reflector 300 may use the mirror axis 302 as a rotation axis to adjust the angle θ between the first reflector 310a and the second reflector 320a. Specifically, the second reflector 320a may rotate about the mirror axis 302.

[0075] Alternatively, the pin 304 may be threadedly mounted on the second end of the second reflector 320a, and the location of the pin 304 may be a predetermined distance from the second end top of the second reflector 320a. Alternatively, the fixing block 303 may be adhesively secured to the other end of the first reflector 310a, with the end of the first reflector 310a corresponding to the second end of the second reflector 320a. Alternatively, the location of the fixing block 303 may be greater than the location of the pin 304 from the second end top of the second reflector 320a.

[0076] It should be noted that one end of the adjustment rod 305 can be bonded to the fixed block 303, and the adjustment rod 305 can also be bonded to the second end of the second reflector 320a. Optionally, the adjustment rod 305 can be in the shape of a cuboid, and one side of the adjustment rod 305 can be parallel to the first reflector 310a, and this side can also be bonded to the second end of the first reflector 310a. However, the adjustment rod 305 is not bonded to the first reflector 310a, and two opposite sides of the adjustment rod 305 can be provided with sliding tracks, which can be engaged with the sliding block 306.

[0077] Furthermore, the inner side of the sliding block 306 may be provided with a groove to engage with the sliding track on the adjustment rod 305. Optionally, after the sliding block 306 slides along the axial direction of the adjustment rod 305, the angle θ between the first reflector 310a and the second reflector 320a can be adjusted. If the angle θ between the first reflector 310a and the second reflector 320a can be adjusted to 0 degrees, that is, the two reflectors are in a closed state, the sliding block 306 can be connected to the fixed block 303.

[0078] Optionally, the hinged rod 307 can be connected to the pin 304 on the second reflector 320a, and to the sliding block 306 clamped on the adjustment rod 305, wherein one end of the hinged rod 307 is fixed, and the position of the other end of the hinged rod 307 can change with the sliding position of the sliding block 306.

[0079] Optionally, the double-sided reflector 300 further includes a locking nut 308. The locking nut 308 is detachably connected to the adjustment rod 305. After the angle θ between the first reflector 310a and the second reflector 320a is adjusted, the adjustment rod 305 is locked by the locking nut 308 to fix the angle θ.

[0080] In addition, before the optical scanning device 10 starts working, the angle θ between the first reflector 310a and the second reflector 320a can be adjusted to the optimal angle required for the scanning field of view, and the adjustment rod 305 can be locked with the locking nut 308 through a detachable connection to fix the angle θ between the first reflector 310a and the second reflector 320a. That is, after the optical scanning device 10 starts working, the angle θ cannot be adjusted, wherein the above-mentioned detachable connection method can be a threaded connection, a pin connection, a key connection, etc., and this embodiment does not impose any limitation on this.

[0081] It should be noted that, when the movable drum support 200 rotates one circle, the first reflective mirror 310a and the second reflective mirror 320a can both scan the same field of view once, and when the movable drum support 200 rotates one circle, the beam width obtained by the second reflective mirror 320a can be equal to the beam width obtained by the first reflective mirror 310a scanned by half the beam width shifted backward. Figure 4 The scanning image of the first reflective mirror 310a and the second reflective mirror 320a is shown. After the first reflective mirror 310a completes the scanning, spaces A1, A2, A3, ..., A n The imaging data of the corresponding position is formed after the second reflector 320a completes the scanning, B1, B2, B3, ..., B n The imaging data at the corresponding position, wherein the second reflecting mirror 320a shifts the beam by half the beam width, and the data intervals of the first reflecting mirror 310a and the second reflecting mirror 320a are equal.

[0082] The optical mechanical scanning device 10 provided in this embodiment has a double-sided reflector 300 in which the angle θ between the first reflector 310a and the second reflector 320a is adjusted by a sliding block 306. When the optical mechanical scanning device 10 starts working and drives the roller movable bracket 200 to rotate, the field of view is alternately scanned by the first reflector 310a and the second reflector 320a, and the results of the alternating scanning are superimposed to increase the spatial sampling density and improve the pixel resolution of the imaging.

[0083] Another embodiment provides an optical mechanical scanning device 10, wherein the drive mechanism 100 includes a servo motor 110 and a transmission mechanism 120. The servo motor 110 is connected to the transmission mechanism 120 for driving the transmission mechanism 120; the transmission mechanism 120 is connected to the rotating shaft 210 of the movable roller bracket for driving the rotating shaft 210 to rotate.

[0084] Optionally, the driving mechanism 100 further includes a driving control module 130 and an encoder 140. The driving control module 130 is electrically connected to the servo motor 110 to control the rotation of the servo motor 110; when the movable roller bracket 200 rotates, the encoder 140 is driven to rotate. Optionally, the transmission mechanism 120 includes a driving wheel 121, a driven wheel 122 and a synchronous belt 123. The driving wheel 121 is coaxially connected to the servo motor 110 through a coupling 150. The driving wheel 121 is vertically connected to the driven wheel 122 through the synchronous belt 123. The driven wheel 122 and the encoder 140 are both installed at both ends of the rotating shaft 210, and the driven wheel 122 and the encoder 140 are coaxially connected. The directivity of the driving wheel 121 is smaller than that of the driven wheel 122.

[0085] Specifically, the servo motor 110 is connected to the driving wheel 121 in a detachable manner via a coupling 150. The model of the servo motor 110 can be flexibly determined according to the design index requirements of the optical scanning imaging system 30. In addition, the servo motor 110 can convert the received electrical signal into torque and speed to drive the transmission mechanism 120 to rotate at a constant speed. Optionally, the speed of the servo motor 110 can be determined according to the functional requirements of the optical scanning imaging system 30, and when the optical scanning device 10 is in working state, its speed can be adjusted by the drive control module 130.

[0086] The transmission ratio between the driving wheel 121 and the driven wheel 122 can be determined based on the relative sizes of the driving wheel 121 and the driven wheel 122, as well as the rotational speed of the servo motor 110. The transmission ratio can be represented by the ratio of the angular velocities of the driving wheel 121 and the driven wheel 122. The driving wheel 121, the driven wheel 122, and the movable roller bracket 200 can all be made of metal, while the synchronous belt 123 can be made of materials such as rubber, fiber, or a metal composite. Optionally, the driven wheel 122 is connected to one end of the rotating shaft 210, and the other end of the rotating shaft 210 is connected to an encoder 140.

[0087] It should be noted that the above-mentioned drive control module 130 can control the scanning speed of the optical scanning device 10 according to the functional requirements of the optical scanning imaging system 30, wherein a circuit board is provided in the drive control module 130, and the circuit board can realize the open state of the optical scanning device 10, and control the rotation speed of the roller movable bracket 200 and the double-sided reflector 300. Optionally, the above-mentioned circuit board is mainly composed of solder pads, vias, mounting holes, wires, components, plug-ins, fillings and electrical boundaries, and common board layer structures can include single-layer boards, double-layer boards and multi-layer boards. Optionally, the above-mentioned circuit board can be installed at the position where it needs to be installed in the drive control module 130 by screws or pasted with insulating adhesive materials.

[0088] Optionally, the drive control module 130 is used to control the working state of the optical scanning device 10 and the speed of the servo motor 110, and read the information obtained by the encoder 140; the servo motor 110 drives the driving wheel 121 to rotate in the vertical direction, wherein the speed of the servo motor 110 is greater than the speed of the driving wheel 121; the driving wheel 121 drives the driven wheel 122 to rotate vertically through the synchronous belt 123; the driven wheel 122 drives the roller movable bracket 200 to rotate along the rotating shaft 210; the encoder 140 is used to record the vertical position coding information of the roller movable bracket 200.

[0089] It is also understood that the driven wheel 122, the encoder 140, and the movable roller bracket 200 are linked and can rotate synchronously at the same speed, which can be lower than the speed of the driving wheel 121. During rotation, the encoder 140 can obtain positional encoding information of the movable roller bracket 200 in the vertical direction, i.e., the number of rotations of the movable roller bracket 200, and the drive control module 130 can read the positional encoding information recorded by the encoder 140 through an electrical connection with the encoder 140.

[0090] The optical scanning device 10 provided in this embodiment, after the driving control module 130 starts the optical scanning device 10, drives the servo motor 110 to rotate, the servo motor 110 drives the active wheel 121, the active wheel 121 drives the driven wheel 122 to rotate vertically through the synchronous belt 123, and at the same time, the driven wheel 122 drives the roller movable bracket 200 to rotate, so as to drive the encoder 140 to rotate. The device can rotate at a uniform speed through the roller movable bracket 200, driving the double-sided reflector 300 to rotate at a uniform speed, so that the scanning speed reaches a stable state, the sampling data is also relatively stable, and the stability of the scanning imaging is improved.

[0091] In one embodiment, the optical scanning device 10 further includes a bracket 400 , and the bracket 400 is used to install the servo motor 110 , the transmission mechanism 120 , and the roller movable bracket 200 ; the bracket 400 is also used to support the drive control module 130 .

[0092] Specifically, such as Figure 1 As shown, the bracket 400 can be a rectangular arch-shaped structure, and the bracket 400 can include a crossbar and two vertical bars, the shape and length of the two vertical bars can be the same, and the two vertical bars can be welded to the two ends of the crossbar respectively, wherein the crossbar and the vertical bars can be made of metal materials, and the crossbar and the two vertical bars are vertically connected. Optionally, the length of the crossbar can be greater than the length of the roller movable bracket 200. Optionally, the bracket can fix the servo motor 110, the transmission mechanism 120, the roller movable bracket 200 and the drive control module 130 in a detachable connection. In addition, the driving wheel 121 and the driven wheel 122 in the transmission mechanism 120 are installed on one side of the bracket 400, and the encoder 140 is installed on the other side of the bracket 400. Optionally, the drive control module 130 can also be installed on the bracket 400.

[0093] Optionally, the optical scanning device 10 further includes a fixing mechanism 500. The fixing mechanism 500 is detachably connected to the bracket 400 and is used to fix the optical scanning device 10. In addition, the driving wheel 121 and the driven wheel 122 are both located on the same side of the bracket 400.

[0094] It should be noted that if Figure 5 The figure shows a schematic top view of the optical scanning device 10, wherein the fixing mechanism 500 may include a polygonal assembly plate and two support beams, the two support beams of equal length. The assembly plate can fix the position of the optical scanning device 10 in the optical scanning imaging system 30. Optionally, the detachable connection method may be a threaded connection, a key connection, a riveted connection, a link, etc., which is not limited in this embodiment.

[0095] The optical scanning device 10 provided in this embodiment supports the driving mechanism 100, the transmission mechanism 120, the roller movable bracket 200 and the encoder 140 through the fixing mechanism 500 and the bracket 400, so that the double-sided reflector 300 can rotate the scanning field of view at a uniform and stable speed, thereby improving the stability of the sampling data and thus the stability of the scanning imaging.

[0096] Figure 6 FIG. 1 is a schematic structural diagram of an optical scanning imaging system 30 provided in one embodiment. Figure 6As shown, the optical mechanical scanning imaging system 30 includes the optical mechanical scanning device 10 and the imaging device 20 as described above; the imaging device 20 is used to obtain information obtained by the optical mechanical scanning device 10 scanning the field of view, and process the information to form an image.

[0097] The optical mechanical scanning imaging system provided in this embodiment can execute the above method embodiment, and its implementation principles and technical effects are similar, which will not be repeated here.

[0098] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0099] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. An optical scanning device, characterized in that: The device comprises a driving mechanism (100), a roller movable bracket (200), and a double-sided reflective mirror (300); the driving mechanism (100) comprises a servo motor (110) and a transmission mechanism (120); the driving mechanism (100) is connected to the roller movable bracket (200), and the roller movable bracket (200) is connected to the double-sided reflective mirror (300); the servo motor (110) is connected to the transmission mechanism (120), and the transmission mechanism (120) is connected to the rotating shaft (210) of the roller movable bracket; The driving mechanism (100) is used to drive the movable roller bracket (200) to rotate; The movable roller bracket (200) is used to support the double-sided reflective mirror (300) and drive the double-sided reflective mirror (300) to rotate around the rotating shaft (210); the transmission mechanism (120) is used to drive the rotating shaft (210) to rotate; The double-sided reflective mirror (300) is arranged on the roller movable bracket (200), and the double-sided reflective mirror (300) includes a first reflective surface (310) and a second reflective surface (320), wherein the first reflective surface (310) and the second reflective surface (320) are arranged in back-to-back relationship, the first reflective surface (310) is parallel to the rotating shaft (210), and the second reflective surface (320) forms an angle with the first reflective surface (310); the first reflective surface (310) is arranged parallel to the rotating shaft (210) and is attached to the surface of the rotating shaft (210); The double-sided reflecting mirror (300) comprises a first reflecting mirror (310a), a second reflecting mirror (320a) and a mirror rotation axis (302); the first reflecting mirror (310a) and the second reflecting mirror (320a) form the included angle; and the second reflecting mirror (320a) is rotatable around the mirror rotation axis (302).

2. The device according to claim 1, characterized in that The first reflector (310a) has the first reflective surface (310), and the second reflector (320a) has the second reflective surface (320).

3. The device according to claim 2, characterized in that The first reflector (310a) is fixed on the rotating shaft (210), and the second reflector (320a) comprises a first end and a second end opposite to each other, the first end is supported on the rotating shaft (210), and the second end extends at the angle in a direction away from the rotating shaft (210).

4. The device according to claim 3, characterized in that The double-sided reflector (300) further comprises a hinge (301), and the second reflector (320a) is connected to the first reflector (310a) via the hinge (301); wherein one end of the first reflector (310a) is connected to the first end of the second reflector (320a) via the hinge (301).

5. The device according to claim 4, characterized in that The mirror rotating shaft (302) fixes the hinge (301).

6. The device according to claim 3, characterized in that The double-sided reflector (300) further includes a fixing block (303) and a pin (304); The fixing block (303) is arranged at the other end of the first reflector (310a), and the pin (304) is arranged at the second end of the second reflector (320a).

7. The device according to claim 6, characterized in that The double-sided reflector (300) further comprises an adjusting rod (305), a sliding block (306), and a hinged rod (307); the adjusting rod (305) is connected to the fixed block (303); the sliding block (306) is connected to the pin (304) via the hinged rod (307); the sliding block (306) is arranged on the adjusting rod (305) and is slidable on the adjusting rod (305) along the axial direction of the rotating shaft (210) for adjusting the angle between the first reflector (310a) and the second reflector (320a); One end of the adjustment rod (305) is fixed via the fixing block (303), and one end of the hinged rod (307) is connected to the second end of the second reflector (320a) via the pin (304).

8. The device according to claim 7, characterized in that The double-sided reflector (300) further includes a locking nut (308); The locking nut (308) and the adjusting rod (305) are detachably connected, and after the angle between the first reflector (310a) and the second reflector (320a) is adjusted, the adjusting rod (305) is locked by the locking nut (308) to fix the angle.

9. The device according to claim 2, characterized in that During the rotation process, the movable roller bracket (200) alternately scans the field of view via the first reflector (310a) and the second reflector (320a).

10. The device according to claim 1, characterized in that The servo motor (110) is used to drive the transmission mechanism (120).

11. The device according to claim 10, characterized in that The driving mechanism (100) further includes a driving control module (130) and an encoder (140); The drive control module (130) is electrically connected to the servo motor (110) and is used to control the rotation of the servo motor (110); When the movable roller bracket (200) rotates, the encoder (140) is driven to rotate.

12. The device according to claim 11, characterized in that The transmission mechanism (120) includes a driving wheel (121), a driven wheel (122), and a synchronous belt (123); The driving wheel (121) and the servo motor (110) are coaxially connected via a coupling (150), the driving wheel (121) and the driven wheel (122) are vertically connected via a synchronous belt (123), the driven wheel (122) and the encoder (140) are both mounted on both ends of the rotating shaft (210), and the driven wheel (122) and the encoder (140) are coaxially connected.

13. The device according to any one of claims 11 or 12, characterized in that The device further comprises a bracket (400), the bracket (400) being used to support the servo motor (110), the transmission mechanism (120) and the roller movable bracket (200), and the bracket (400) is also used to support the drive control module (130).

14. The device according to claim 11, characterized in that The device further comprises a fixing mechanism (500); The fixing mechanism (500) is detachably connected to the bracket (400), and the fixing mechanism (500) is used to fix the optical scanning device.

15. The device according to claim 12, characterized in that The driving mechanism (100) comprises: The drive control module (130) is used to control the working state of the optical scanning device (10) and the rotation speed of the servo motor (110), and read information obtained by the encoder (140); The servo motor (110) drives the driving wheel (121) to rotate in a vertical direction, wherein the rotation speed of the servo motor (110) is greater than the rotation speed of the driving wheel (121); The driving wheel (121) drives the driven wheel (122) to rotate vertically via a synchronous belt (123); The driven wheel (122) drives the movable roller bracket (200) to rotate along the rotating shaft (210); The encoder (140) is used to record position coding information of the movable roller bracket (200) in the vertical direction.

16. The device according to claim 15, characterized in that The diameter of the driving wheel (121) is smaller than the diameter of the driven wheel (122).

17. The device according to claim 16, characterized in that The driving wheel (121) and the driven wheel (122) are both located on the same side of the bracket (400).

18. The device according to claim 1, wherein The movable roller bracket (200) is a cylindrical bracket, and the cylindrical surface of the cylindrical bracket is covered with a transparent film.

19. An optical scanning imaging system, characterized in that: The system comprises an optical mechanical scanning device (10) according to any one of claims 1 to 18, and an imaging device (20); The imaging device (20) is used to obtain information obtained by the optical machine scanning device (10) scanning the field of view, and to process and image the information.

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