Non-vision field imaging simple measuring device based on photon flight time measurement

Abstract

The utility model discloses a non-vision field imaging simple measuring device based on photon flight time measurement, and relates to the technical field of non-vision field imaging simple measurement, the device comprises a measuring device body, an emitting device and a receiving device are fixedly connected outside the measuring device body, and the emitting device and the receiving device are adjacently arranged in parallel. A light interference prevention assembly used for preventing stray light interference is arranged in the measuring device body, and stray light rays from the side face of a lens or a detector can be shielded by installing a light shielding plate above the transmitting device and the receiving device. Through the cooperation of the light shielding plate, the movable column and the vertical groove, after the position of the interference light source changes, the change can be adapted by controlling the movement of the movable column, the dynamic adjustment mechanism is realized by utilizing the mobility and stretchability of the light shielding plate, and the angle or size of the light shielding plate is adjusted according to actual needs. Therefore, unnecessary light sources above the transmitting device and the receiving device can be always shielded.

Description

Technical Field

[0001] This utility model relates to the field of simplified measurement technology for non-line-of-sight imaging, specifically a simplified measurement device for non-line-of-sight imaging based on photon time-of-flight measurement. Background Technology

[0002] Time-of-flight (TOF) measurement is a technique that calculates the distance between two points by utilizing the time it takes for a photon to travel between them. Often referred to as time-of-flight or optical time-of-flight ranging, its core principle is the constancy of the speed of light. By measuring the time difference between the emission of a light pulse and its reflection back to the object and reception, combined with the speed of light, the distance between the target object and the sensor can be accurately calculated. Non-line-of-sight (NLOS) imaging is a technique that reconstructs images of objects occluded by obstacles. It utilizes the effective signal carried by indirectly scattered light to reconstruct the occluded object. Specifically, a detector collects photons carrying information about the target object that are scattered back from multiple surfaces, and then calculates and reconstructs a three-dimensional image of the occluded scene.

[0003] Simple measurement devices for non-line-of-sight (NLOS) imaging typically use lasers to emit ultra-narrow pulsed lasers. These laser signals are scattered after reaching an intermediate surface (such as a diffuse reflective wall). Some of these photons enter the obstructed non-line-of-sight space and return after being scattered by the target object. However, in NLOS imaging, environmental noise and interference are common problems. For example, stray light can interfere with the detection and recording of photons, increase the noise level of the optical system, make the system image more blurred, and degrade the imaging quality.

[0004] Therefore, this invention proposes a simple non-line-of-sight imaging measurement device based on photon time-of-flight measurement to improve upon the shortcomings of traditional technologies. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides a simple non-line-of-sight imaging measurement device based on photon time-of-flight measurement, which solves the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution: a simple non-line-of-sight imaging measurement device based on photon time-of-flight measurement, comprising a measurement device body, a transmitting device and a receiving device fixedly connected to the outside of the measurement device body, the transmitting device and the receiving device being placed adjacent to each other in parallel, and an anti-light interference component for preventing stray light interference being provided inside the measurement device body.

[0007] Preferably, the anti-light interference component includes a light shield, which is located above the transmitting device and the receiving device. Two fixed columns and a movable column are fixedly connected to the bottom of the light shield. The two fixed columns are located in the middle of the light shield, and the movable columns are symmetrically distributed around the fixed columns.

[0008] Preferably, the anti-light interference component further includes an arc groove, which is formed on the outer surface of the measuring device body. The inner wall of the arc groove has a cavity. The outer surfaces of the two fixed columns and the movable columns at both ends of the light shield are fixedly connected to a first connecting plate and a second connecting plate. A third connecting plate is rotatably connected between the two first connecting plates and the second connecting plate. The third connecting plates are rotatably connected end to end and are rotatably connected to the outer surface of the movable column.

[0009] Preferably, the first connecting plate, the second connecting plate, and the third connecting plate are all located inside the cavity.

[0010] Preferably, the inner wall of the arc groove is provided with an arc sliding groove, and a pulley is slidably connected inside the arc sliding groove, the pulley being rotatably connected inside the movable column.

[0011] Preferably, the anti-light interference component further includes a cylinder, which is fixedly installed on the inner wall of the measuring device body. A movable plate is slidably connected inside the measuring device body, and a vertical groove is formed on the outer surface of the movable plate. The output end of the cylinder is fixedly connected to the outer surface of the movable plate.

[0012] Preferably, the movable columns slide inside the arc groove, the movable columns at both ends of the light shield slide through the arc groove inside the vertical groove, and the ends of the two fixed columns away from the light shield pass through the arc groove and are fixedly connected to the inner wall of the measuring device body.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] By installing a light shield above the transmitting and receiving devices, stray light from the sides of the lens or detector can be blocked, preventing this light from entering the lens or detector, thereby reducing interference such as halos and glare and improving image quality. Through the cooperation of the light shield, movable column, and vertical slot, the position of the interfering light source can be adjusted by controlling the movement of the movable column to adapt to changes in this dynamic adjustment mechanism. This mechanism utilizes the movable and stretchable nature of the light shield, adjusting its angle or size according to actual needs to ensure that unnecessary light sources above the transmitting and receiving devices are always blocked. By designing the fixed column to be fixed and the movable column to be located inside the movable plate, both ends of the light shield are supported, making the light shield structurally more stable and less prone to shaking or deformation. This helps to ensure that the light shield can always accurately block interfering light sources and improve image quality. Attached Figure Description

[0015] Figure 1 This is a three-dimensional schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a front view of the overall structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the anti-light interference component of this utility model;

[0018] Figure 4 This is a schematic diagram of the position structure of the arc groove of this utility model;

[0019] Figure 5 This is a schematic diagram of the position structure of the movable plate of this utility model.

[0020] The labels in the diagram represent:

[0021] 1. Measuring device body; 2. Transmitting device; 3. Receiving device;

[0022] 4. Anti-light interference component; 41. Light shield; 42. Fixed column; 43. Movable column; 44. Arc groove; 45. First connecting plate; 46. Second connecting plate; 47. Third connecting plate; 48. Pulley; 49. Arc groove; 410. Cylinder; 411. Moving plate; 412. Vertical groove. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] refer to Figures 1 to 5 As shown, a preferred embodiment of the present invention will be described in detail below:

[0025] A simple non-line-of-sight imaging measurement device based on photon time-of-flight measurement includes a measurement device body 1, a transmitter 2 and a receiver 3 fixedly connected to the outside of the measurement device body 1, the transmitter 2 and the receiver 3 being placed adjacent to each other in parallel, and an anti-light interference component 4 for preventing stray light interference is provided inside the measurement device body 1.

[0026] In this embodiment, the transmitting device 2 and the receiving device 3 adopt a dual-telescope structure, integrating the transmitting device 2 and the receiving device 3 together to ensure coaxial transmission and reception of photons. The transmitting device 2 is used to expand and collimate the pulsed laser beam and then transmit it to the intermediate wall, and the receiving device 3 is used to receive the photon signal scattered back through the intermediate wall.

[0027] The anti-light interference component 4 includes a light shield 41. The light shield 41 is black in color, which can effectively absorb or reflect light and reduce the possibility of light transmission or scattering. The light shield 41 is located above the transmitting device 2 and the receiving device 3. It can block stray light from the side of the lens or detector and prevent this light from entering the lens or detector, thereby reducing interference such as halo and glare and improving image quality. The light shield 41 can also protect the lens from accidental damage to a certain extent, such as collisions, dust or water droplets. Two fixed posts 42 and a movable post 43 are fixedly connected to the bottom of the light shield 41. The two fixed posts 42 are located in the middle of the light shield 41, and the movable posts 43 are symmetrically distributed around the fixed posts 42, which can improve the overall stability of the light shield 41.

[0028] The anti-light interference component 4 also includes an arc groove 44, which is formed on the outer surface of the measuring device body 1. The inner wall of the arc groove 44 has a cavity. A first connecting plate 45 and a second connecting plate 46 are fixedly connected to the outer surfaces of the two fixed columns 42 and the movable columns 43 at both ends of the light-shielding plate 41. A third connecting plate 47 is rotatably connected between the two first connecting plates 45 and the second connecting plate 46. The third connecting plates 47 are rotatably connected end-to-end and rotatably connected to the outer surface of the movable columns 43. This allows for... The light shield 41 is movable and stretchable. It is formed by the combination of the first connecting plate 45, the second connecting plate 46 and the third connecting plate 47 to form a stretchable rhomboid shape. The fixed column 42 and the movable column 43 are both fixedly connected to the lower middle position of the third connecting plate 47. In this way, an arc-shaped stretching direction can be achieved. The movement of the light shield 41 can be adjusted according to the shape and direction of the arc groove 44. Its angle or size can be adjusted according to actual needs to ensure that it can always block unnecessary light sources above the transmitting device 2 and the receiving device 3.

[0029] The first connecting plate 45, the second connecting plate 46, and the third connecting plate 47 are all located inside the cavity. The cavity restricts the first connecting plate 45, the second connecting plate 46, and the third connecting plate 47, preventing them from easily tipping over when they are located outside the measuring device body 1.

[0030] The inner wall of the arc groove 44 is provided with an arc sliding groove 49, and a pulley 48 is slidably connected inside the arc sliding groove 49. The pulley 48 is rotatably connected inside the movable column 43. In this way, the movable column 43 can reduce friction and resistance when moving, and improve the smoothness of its adjustment of the light shield 41.

[0031] The light interference prevention component 4 also includes a cylinder 410, which is fixedly installed on the inner wall of the measuring device body 1. A movable plate 411 is slidably connected inside the measuring device body 1. A vertical groove 412 is opened on the outer surface of the movable plate 411. The output end of the cylinder 410 is fixedly connected to the outer surface of the movable plate 411. In this way, the parallel movement of the movable plate 411 can realize the arc-shaped unfolding of the light shield 41.

[0032] The movable columns 43 slide inside the arc groove 44. The movable columns 43 at both ends of the light shield 41 slide through the arc groove 44 and inside the vertical groove 412. The ends of the two fixed columns 42 away from the light shield 41 pass through the arc groove 44 and are fixedly connected to the inner wall of the measuring device body 1. In this way, both ends of the light shield 41 are supported, making the light shield 41 more structurally stable and less prone to shaking or deformation. This helps to ensure that the light shield 41 can always accurately block interfering light sources and improve imaging quality.

[0033] The following is the complete working process and working principle of the above embodiments:

[0034] In the initial state, the light shield 41 is located above the transmitting device 2 and the receiving device 3. By installing the light shield 41 above the transmitting device 2 and the receiving device 3, stray light from the side of the lens or detector can be blocked, preventing this light from entering the lens or detector, thereby reducing interference such as halos and glare and improving image quality.

[0035] When the position of the interfering light source changes, the operator activates cylinder 410. The output end of cylinder 410 moves, driving the moving plate 411 to move. The movement of moving plate 411 causes the movable column 43 to move downward in an arc shape within the vertical groove 412 and the arc groove 44. The movement of the movable columns 43 at both ends of the light shield 41 causes the first connecting plate 45, the second connecting plate 46, and the third connecting plate 47 to gradually become parallel to the arc of the arc groove 44. The movement of movable column 43 stretches the light shield 41, increasing its shielding area and changing its position. Through the cooperation of the light shield 41, movable column 43, and vertical groove 412, the position of the interfering light source can be adjusted by controlling the movement of movable column 43 to adapt to the change. This dynamic adjustment mechanism utilizes the mobility and stretchability of the light shield 41, adjusting its angle or size according to actual needs to ensure that unnecessary light sources above the transmitting device 2 and the receiving device 3 are always blocked.

[0036] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A simple non-line-of-sight imaging measurement device based on photon time-of-flight measurement, characterized in that, The device includes a measuring device body (1), to which a transmitting device (2) and a receiving device (3) are fixedly connected. The transmitting device (2) and the receiving device (3) are placed adjacent to each other in parallel. The measuring device body (1) is equipped with an anti-light interference component (4) for preventing stray light interference.

2. The simplified non-line-of-sight imaging measurement device based on photon time-of-flight measurement according to claim 1, characterized in that: The light interference prevention component (4) includes a light shield (41), which is located above the transmitting device (2) and the receiving device (3). Two fixed columns (42) and a movable column (43) are fixedly connected to the bottom of the light shield (41). The two fixed columns (42) are located in the middle of the light shield (41), and the movable column (43) is symmetrically distributed around the fixed columns (42).

3. A simplified non-line-of-sight imaging measurement device based on photon time-of-flight measurement according to claim 2, characterized in that: The light interference prevention component (4) also includes an arc groove (44), which is opened on the outer surface of the measuring device body (1). The inner wall of the arc groove (44) is provided with a cavity. The outer surfaces of the movable columns (43) at both ends of the two fixed columns (42) and the light shield (41) are fixedly connected to a first connecting plate (45) and a second connecting plate (46). A third connecting plate (47) is rotatably connected between the two first connecting plates (45) and the second connecting plate (46). The third connecting plates (47) are rotatably connected end to end and are rotatably connected to the outer surface of the movable column (43).

4. A simplified non-line-of-sight imaging measurement device based on photon time-of-flight measurement according to claim 3, characterized in that: The first connecting plate (45), the second connecting plate (46) and the third connecting plate (47) are all located inside the cavity.

5. A simplified non-line-of-sight imaging measurement device based on photon time-of-flight measurement according to claim 3, characterized in that: The inner wall of the arc groove (44) is provided with an arc sliding groove (49), and a pulley (48) is slidably connected inside the arc sliding groove (49). The pulley (48) is rotatably connected inside the movable column (43).

6. A simplified non-line-of-sight imaging measurement device based on photon time-of-flight measurement according to claim 2, characterized in that: The anti-light interference component (4) also includes a cylinder (410), which is fixedly installed on the inner wall of the measuring device body (1). A movable plate (411) is slidably connected inside the measuring device body (1). A vertical groove (412) is opened on the outer surface of the movable plate (411). The output end of the cylinder (410) is fixedly connected to the outer surface of the movable plate (411).

7. A simplified non-line-of-sight imaging measurement device based on photon time-of-flight measurement according to claim 2, characterized in that: The movable columns (43) all slide inside the arc groove (44). The movable columns (43) at both ends of the light shield (41) slide through the arc groove (44) inside the vertical groove (412). The ends of the two fixed columns (42) away from the light shield (41) pass through the arc groove (44) and are fixedly connected to the inner wall of the measuring device body (1).

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