Corner reflector
By introducing scale lines, a carriage, an inverted U-shaped spring plate, a rotating mechanism with the carriage, and a telescopic support mechanism into the corner reflector, the problems of inconvenient operation and large measurement errors of traditional corner reflectors are solved, enabling precise alignment and efficient measurement between the corner reflector and the radar.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-13
- Publication Date
- 2026-03-17
AI Technical Summary
Traditional corner reflectors are inconvenient to operate and have large measurement errors in the calibration process of millimeter-wave radar for intelligent connected vehicles. Furthermore, the corner reflector cannot be aligned with the radar, resulting in inaccurate measurement results.
A corner reflector comprising a base plate, upright, carriage, inverted U-shaped spring plate, rangefinder, support, and triangular pyramidal reflector is designed. Through the rotational cooperation of the scale lines, carriage, inverted U-shaped spring plate and carriage, and telescopic support mechanism, the height and pitch angle of the triangular pyramidal reflector can be precisely adjusted to ensure alignment with the millimeter-wave radar.
It improved measurement accuracy and work efficiency, reduced human measurement errors, achieved accurate positioning and alignment of the triangular pyramidal reflector with the radar, and simplified the operation process.
Smart Images
Figure CN224005245U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electromagnetic wave reflection technology, specifically to a corner reflector. Background Technology
[0002] Corner reflectors, also known as radar reflectors, are radar wave reflectors made of metal sheets in various specifications according to different applications. When radar electromagnetic waves scan a corner reflector, the electromagnetic waves are refracted and amplified at the metal corner, producing a strong echo signal that appears as a strong echo target on the radar screen. Due to their extremely strong echo characteristics, corner reflectors are widely used in military, ship rescue, automotive, and other fields.
[0003] In the calibration of millimeter-wave radar for intelligent connected vehicles, corner reflectors are used. Traditional corner reflectors require separate height measurement and adjustment using a ruler, with one person measuring the height and another adjusting it, or one person performing the height adjustment in two steps. This is inconvenient and inefficient. Furthermore, the original reflector bracket cannot be adjusted to be level, making it impossible to align the corner reflector with the radar after placement. The apex of the corner reflector can only be visually estimated, leading to inaccurate measurement results and significant errors. Additionally, measuring the distance between the corner reflector and the radar using a measuring tape introduces measurement errors due to human factors and angle variations. Therefore, this paper proposes an improved corner reflector that allows for accurate measurement with minimal error. Utility Model Content
[0004] The purpose of this invention is to provide a corner reflector to solve the problems of existing corner reflectors where the bracket cannot be adjusted to be level, resulting in a large distance measurement error between the corner reflector and the radar, and the corner reflector cannot be aligned with the radar.
[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows:
[0006] A corner reflector includes: a base plate, a vertical pole mounted on the base plate, a slide mounted on the vertical pole, an inverted U-shaped spring plate mounted on the outside of the slide plate and parallel to the base plate, a rangefinder mounted on top of the inverted U-shaped spring plate, a bracket mounted on the side of the inverted U-shaped spring plate away from the slide plate, and a triangular pyramidal reflector mounted on the bracket, wherein the tip of the triangular pyramidal reflector is located below the bracket and the rangefinder, and the tip of the triangular pyramidal reflector and the rangefinder end of the rangefinder are on the same straight line.
[0007] The outer wall of the pole is marked with scale lines, and the slide is locked to the outer wall of the pole by fasteners. The bottom of the inverted U-shaped spring plate is equipped with a telescopic support mechanism for fine-tuning the pitch angle of the triangular cone reflector.
[0008] Furthermore, the aforementioned inverted U-shaped spring plate is rotatably engaged with one side of the slide, and the distance between the firing point of the ranging end on the ranging device and the rotation axis of the inverted U-shaped spring plate is equal to the distance between the tip of the triangular pyramidal reflector and the rotation axis of the inverted U-shaped spring plate.
[0009] Furthermore, the aforementioned carriage has a square tubular structure, and the internal dimensions of the carriage match the dimensions of the upright.
[0010] Furthermore, rounded corners are provided at the four corners of the inner wall of the aforementioned carriage.
[0011] Furthermore, the aforementioned triangular pyramidal reflector comprises three identical isosceles right-angled triangles, which are welded together between adjacent isosceles right-angled triangles.
[0012] Furthermore, the aforementioned telescopic support mechanism includes two L-shaped rods symmetrically arranged on the inner bottom wall of the inverted U-shaped spring plate and located near both sides, two pull rods that are rotatably engaged with the ends of the two L-shaped rods, a threaded rod threadedly connected between the two pull rods, and a fixing ring disposed on the outer wall of the middle part of the threaded rod. The pull rods are provided with threaded holes along the axial direction that are threadedly engaged with the threaded rod, and the threads on the outer walls of the two ends of the threaded rod are in opposite directions.
[0013] Furthermore, two sets of limiting nuts are respectively provided on the threaded rod, and the two sets of limiting nuts are located on both sides of the fixing ring.
[0014] Furthermore, the end of the aforementioned tie rod away from the threaded rod is provided with a shaft hole, and a ball bearing is installed in the shaft hole, with the end of the L-shaped rod rotating in conjunction with the ball bearing.
[0015] This utility model has the following beneficial effects:
[0016] 1. The corner reflector of this utility model drives the slide to slide upward along the upright, which can change the height of the inverted U-shaped spring plate, the rangefinder, and the triangular pyramidal reflector. This allows the triangular pyramidal reflector to be at the same height as the external millimeter-wave radar, facilitating alignment between the reflector and the radar. The outer wall of the upright is provided with scale lines, which, in conjunction with the slide, facilitate reading the distance the slide moves. Since the measuring end of the rangefinder is on the same straight line as the tip of the triangular pyramidal reflector, once the height of the reflector is confirmed, the slide is slid downward to align the measuring end of the rangefinder with the millimeter-wave radar. The measuring end of the rangefinder measures the distance between the reflector and the radar, which is the distance from the tip of the reflector to the radar. This reduces the error of manual measurement with a measuring tape and saves measurement time.
[0017] 2. In this utility model, the inverted U-shaped spring plate rotates and engages with one side of the slide. The distance between the ranging end emission point on the ranging device and the rotation axis of the inverted U-shaped spring plate is equal to the distance between the tip of the triangular pyramidal reflector and the rotation axis of the inverted U-shaped spring plate. This drives the slide to slide upward along the upright and aligns the triangular pyramidal reflector with the millimeter-wave radar. At this point, the inverted U-shaped spring plate is rotated 180°, and the ranging device measures the distance between it and the millimeter-wave radar, which is the distance from the tip of the triangular pyramidal reflector to the millimeter-wave radar. Without affecting the height of the slide and the inverted U-shaped spring plate, the measurement function of the ranging device and the calibration function of the triangular pyramidal reflector can be switched by rotation, which greatly facilitates operation, reduces height and distance errors, improves detection accuracy and work efficiency, and enables accurate positioning through the ranging end of the ranging device.
[0018] 3. The corner reflector of this utility model, by setting a telescopic support mechanism, is used to finely adjust the pitch angle of the triangular pyramid reflector, thereby making the triangular pyramid reflector sports millimeter-wave radar more accurate in centering. The L-shaped rod and the pull rod rotate in coordination, driving the fixed ring to rotate, which in turn drives the threaded rod to rotate. Since the threads on the outer walls of the two ends of the threaded rod are in opposite directions, the distance between the two pull rods can be lengthened or shortened. The inverted U-shaped spring plate is made of elastic material. Therefore, when the distance between the two pull rods is lengthened, the inverted U-shaped spring plate will undergo elastic deformation, and the end of the inverted U-shaped spring plate away from the slide will move upward, thereby causing the rangefinder and the triangular pyramid reflector to move upward. When the distance between the two pull rods is shortened, the end of the inverted U-shaped spring plate away from the slide will move downward, thereby causing the rangefinder and the triangular pyramid reflector to move downward, changing the pitch angle of the triangular pyramid reflector in the longitudinal direction. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the overall structure of the corner reflector;
[0020] Figure 2 This is a schematic diagram of the telescopic support mechanism;
[0021] Figure 3 This is a partial structural diagram of a corner reflector.
[0022] In the diagram: 1. Base plate; 2. Upright pole; 3. Carriage; 4. Inverted U-shaped spring plate; 5. Rangefinder; 6. Bracket; 7. Triangular cone reflector; 8. Telescopic support mechanism; 81. L-shaped rod; 82. Tie rod; 83. Threaded rod; 84. Fixing ring; 85. Limiting nut; 86. Ball bearing. Detailed Implementation
[0023] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.
[0024] like Figure 1 and Figure 2 As shown, an embodiment of this utility model provides a corner reflector, including: a base plate 1; a vertically mounted pole 2 on the base plate 1, the pole 2 being vertically fixed to the top of the base plate 1; a slide 3 slidably mounted on the pole 2; an inverted U-shaped spring plate 4 mounted on the outside of the slide 3 and parallel to the base plate 1; a rangefinder 5 mounted on the top of the inverted U-shaped spring plate 4; the inverted U-shaped spring plate 4 is made of an elastic material, which can both support the rangefinder 5 and have a certain degree of elasticity; the material is not specifically limited here; a bracket 6 mounted on the side of the inverted U-shaped spring plate 4 away from the slide 3; and a bracket 6 mounted on the bracket 6. The triangular pyramidal reflector 7 is located below the support 6 and the rangefinder 5. The tip of the triangular pyramidal reflector 7 is located directly below the measuring end of the rangefinder 5, and the tip of the triangular pyramidal reflector 7 and the measuring end of the rangefinder 5 are on the same straight line. Therefore, the tip and the measuring end are on the same vertical straight line. The rangefinder 5 adopts the existing Fluke404E405 laser rangefinder and is fixed to the top side of the end of the inverted U-shaped spring plate 4 away from the slide 3 by screws. The triangular pyramidal reflector 7 includes three identical isosceles right triangles, which are welded together between adjacent isosceles right triangles.
[0025] Specifically, the slide 3 is locked to the outer wall of the upright 2 by a fastener. The fastener is used to lock the slide 3 to the outer wall of the upright 2 when necessary. The fastener can be a bolt, which passes through one side wall of the slide 3 and abuts against the outer wall of the upright 2. In this embodiment, the slide 3 has a square tube structure, and the internal dimensions of the slide 3 match the dimensions of the upright 2. At the same time, rounded corners are provided at the four corners of the inner wall of the slide 3. In other embodiments of this utility model, the slide 3 can be a U-shaped plate. The two side walls of the U-shaped plate are located outside the opposite side walls of the upright 2, and the two side walls of the U-shaped plate are abutted against the outer wall of the upright 2 by bolts, which facilitates fixing the slide 3 when necessary. At the same time, in other embodiments of this utility model, threaded holes can be opened sequentially from top to bottom on the outer wall of the upright 2. Bolts pass through the side walls of the slide 3 and are threadedly connected to the threaded holes, which can also achieve locking and fixing of the slide 3.
[0026] The outer wall of the upright 2 is provided with scale lines. The upright 2 cooperates with the slide 3. By driving the slide 3 to slide upward along the upright 2, the slide 3 will drive the ranging component 5, the bracket 6 and the triangular pyramid reflector 7 to move upward, thereby adjusting the height of the triangular pyramid reflector 7 and aligning it with the external millimeter-wave radar. At this time, the scale value on the upright 2 is read. Then, the slide 3 is driven to slide downward along the upright 2, and the ranging end of the ranging component 5 is aligned with the millimeter-wave radar. The distance between the ranging component 5 and the millimeter-wave radar is measured by the ranging component 5. The distance measured by the ranging component 5 is the distance between the tip of the triangular pyramid reflector 7 and the millimeter-wave radar. This reduces the error of manual measurement with a measuring tape, facilitates operation and improves work efficiency.
[0027] like Figure 2 As shown, the bottom of the inverted U-shaped spring plate 4 is provided with a telescopic support mechanism 8 for finely adjusting the pitch angle of the triangular cone reflector 7.
[0028] Specifically, the telescopic support mechanism 8 includes two L-shaped rods 81 symmetrically arranged on the inner bottom wall of the inverted U-shaped spring plate 4, near both sides; two pull rods 82 rotatably engaged with the ends of the two L-shaped rods 81; the ends of the pull rods 82 away from the threaded rod 83 have shaft holes, and ball bearings 86 are installed in the shaft holes; the ends of the L-shaped rods 81 rotatably engage with the ball bearings 86, thereby achieving the rotatable engagement between the pull rods 82 and the L-shaped rods 81; a threaded rod 83 threadedly connected between the two pull rods 82; and a retaining ring 84 disposed on the outer wall of the middle part of the threaded rod 83; the pull rods 82 have threaded holes axially engaged with the threaded rod 83, and the threads on the outer walls of the two ends of the threaded rod 83 have opposite directions, thus the threads on the threaded holes of the two pull rods 82 also have opposite directions. By driving the retaining ring 84 to rotate, the threaded rod 83 can be rotated, thereby lengthening or shortening the distance between the two pull rods 82. When the distance between the two pull rods 82 is extended, the inverted U-shaped spring plate 4 will undergo elastic deformation, causing the end of the inverted U-shaped spring plate 4 away from the slide 3 to move upward, thereby causing the rangefinder 5 and the triangular cone reflector 7 to move upward. When the distance between the two pull rods 82 is shortened, the end of the inverted U-shaped spring plate 4 away from the slide 3 will move downward, thereby causing the rangefinder 5 and the triangular cone reflector 7 to move downward, thus changing the pitch angle of the triangular cone reflector 7 in the longitudinal direction.
[0029] In order to limit the movement of the threaded rod 83, two sets of limiting nuts 85 are respectively provided on the threaded rod 83, and the two sets of limiting nuts 85 are located on both sides of the fixing ring 84.
[0030] In this embodiment, when the corner reflector is in use, the fixing parts are loosened, and the slide 3 is driven to move the inverted U-shaped spring plate 4, the rangefinder 5, the bracket 6, and the triangular pyramidal reflector 7, so that the triangular pyramidal reflector 7 is aligned with the millimeter-wave radar. The height value of the triangular pyramidal reflector 7 can be read through the scale line on the upright 2. After reading, the slide 3 is driven to move the triangular pyramidal reflector 7 and the rangefinder 5 downward, so that the measuring end of the rangefinder 5 is aligned with the millimeter-wave radar. The distance between the rangefinder 5 and the millimeter-wave radar is measured through the rangefinder 5, thus measuring the distance between the tip of the triangular pyramidal reflector 7 and the millimeter-wave radar. During use, when the triangular pyramidal reflector 7 is aligned with the millimeter-wave radar but not centered, the pitch angle of the triangular pyramidal reflector 7 can be finely adjusted through the telescopic support mechanism 8, so that the triangular pyramidal reflector 7 is more accurately aligned with the millimeter-wave radar.
[0031] like Figure 3 As shown, in another embodiment of this utility model, the inverted U-shaped spring plate 4 is rotatably engaged with one side of the slide 3. A shaft hole is provided on the outer wall of one side of the slide 3. A rotating shaft that engages with the shaft hole is fixed on the corresponding side wall of the inverted U-shaped spring plate 4, thereby achieving rotation through the shaft hole engagement. Furthermore, the distance between the emission point of the ranging end on the ranging member 5 and the rotation axis of the inverted U-shaped spring plate 4 is equal to the distance between the tip of the triangular pyramidal reflector 7 and the rotation axis of the inverted U-shaped spring plate 4. This arrangement ensures that the emission point of the ranging end on the ranging member 5 and the tip of the triangular pyramidal reflector 7 are on the same circumference.
[0032] In this embodiment, when using the corner reflector, loosen the fixing piece and drive the slide 3 to move the inverted U-shaped spring plate 4, the rangefinder 5, the bracket 6, and the triangular pyramidal reflector 7, aligning the triangular pyramidal reflector 7 with the millimeter-wave radar. Then tighten the fixing piece and lock the slide 3 onto the upright 2. The height of the triangular pyramidal reflector 7 can be read through the scale lines on the upright 2. When the triangular pyramidal reflector 7 is aligned with the millimeter-wave radar but not centered, the pitch of the triangular pyramidal reflector 7 can be finely adjusted through the telescopic support mechanism 8. The angle is adjusted so that the triangular pyramidal reflector 7 is accurately aligned with the millimeter-wave radar. Then, the inverted U-shaped spring plate 4 is rotated 180°, at which point the measuring end of the ranging element 5 corresponds to the millimeter-wave radar. The ranging element 5 measures the distance between itself and the millimeter-wave radar, which is the distance from the tip of the triangular pyramidal reflector 7 to the millimeter-wave radar. By rotating, the measurement function of the ranging element 5 and the calibration function of the triangular pyramidal reflector 7 are switched, greatly simplifying operation, reducing height and distance errors, and improving detection accuracy and work efficiency.
[0033] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A corner reflector characterized by, The utility model provides a kind of distance measuring device, including: Bottom plate (1), vertical setting on the bottom plate (1) vertical rod (2), slidingly arranged on the vertical rod (2) sliding frame (3), the inverted U-shaped elastic plate (4) being arranged on the outer side of the sliding frame (3) and being parallel with the bottom plate (1), the ranging element (5) being arranged on the top of the inverted U-shaped elastic plate (4), the bracket (6) being arranged on the side of the inverted U-shaped elastic plate (4) away from the sliding frame (3), and the triangular pyramid reflector (7) being arranged on the bracket (6), the tip of the triangular pyramid reflector (7) is below the bracket (6) and the ranging element (5), and the tip of the triangular pyramid reflector (7) is on the same straight line with the ranging end of the ranging element (5). The outer wall of the vertical rod (2) is provided with a scale line, the sliding frame (3) is locked on the outer wall of the vertical rod (2) by a fixing member, and the bottom of the inverted U-shaped elastic plate (4) is provided with a telescopic supporting mechanism (8) for fine adjustment of the pitch angle of the triangular pyramid reflector (7).
2. The corner reflector of claim 1, wherein The inverted U-shaped elastic plate (4) is rotationally connected with one side of the sliding frame (3), the distance between the emission point of the ranging end on the ranging element (5) and the rotary shaft of the inverted U-shaped elastic plate (4) is equal to the distance between the tip of the triangular pyramid reflector (7) and the rotary shaft of the inverted U-shaped elastic plate (4).
3. The corner reflector of claim 1, wherein The sliding frame (3) is in the form of a square tube, and the internal dimensions of the sliding frame (3) match the dimensions of the vertical rod (2).
4. The corner reflector of claim 3, wherein The inner wall of the sliding frame (3) is provided with rounded corners at the four corners.
5. The corner reflector of claim 1, wherein The triangular pyramid reflector (7) includes three identical isosceles right-angled triangular plates, and adjacent isosceles right-angled triangular plates are welded.
6. The corner reflector according to any one of claims 1 to 5, characterized in that The telescopic supporting mechanism (8) includes two L-shaped rods (81) symmetrically arranged on the inner bottom wall of the inverted U-shaped elastic plate (4) and respectively located near the two sides, two pull rods (82) rotationally connected with the ends of the two L-shaped rods (81), a threaded rod (83) threadedly connected between the two pull rods (82), and a fixing ring (84) arranged on the middle outer wall of the threaded rod (83), the pull rod (82) is axially provided with a threaded hole threadedly connected with the threaded rod (83), and the threads on the two ends of the threaded rod (83) are opposite in direction.
7. The corner reflector of claim 6, wherein, Two sets of limiting nuts (85) are arranged on the threaded rod (83), and the two sets of limiting nuts (85) are located on the two sides of the fixing ring (84).
8. The corner reflector of claim 6, wherein, The end of the pull rod (82) away from the threaded rod (83) is provided with an axle hole, and a ball bearing (86) is installed in the axle hole, and the end of the L-shaped rod (81) is rotationally connected with the ball bearing (86).