A multispectral non-contact snow accumulation detection device

Abstract

This invention relates to the field of infrared spectroscopy technology, specifically to a multispectral non-contact snow detection device, comprising a top plate, a protective cylinder, and a multispectral detector. The top plate has an axially oriented groove on its bottom surface, within which a movable plate is slidably mounted. A central block is mounted on the bottom surface of the movable plate. The protective cylinder has a through hole on its top surface, through which it is fitted over the central block. The multispectral detector is disposed inside the protective cylinder. A thickened portion protrudes from the top surface of the top plate, housing a positioning mechanism for positioning the movable plate. Support plates are vertically mounted on both sides of the top plate, and clamping mechanisms are installed at the lower ends of each support plate. This invention features a simple structure. The clamping mechanisms allow the device to be fixed to the rear of a truck bed, enabling it to move with the truck, increasing the detection range. Furthermore, the multispectral detector is protected by a protective cylinder with a retractable function, ensuring the safety of the multispectral detector during use.

Description

Technical Field

[0001] This invention relates to the field of infrared spectroscopy technology, specifically to a multispectral non-contact snow detection device. Background Technology

[0002] Multispectral non-contact snow cover detection devices achieve non-contact measurement of road surface conditions based on the infrared spectral characteristics of water, ice, and snow. The principle is that when the road surface is wet, waterlogged, icy, or covered in snow, the incident light, due to reflection from the surface and absorption and scattering by water molecules and solid particles, produces three backscattered light signals with different characteristics. The road surface condition can be determined based on the magnitude of these three signals. Different thickness calculation formulas are then used depending on the type of cover. The thickness of the cover can be calculated based on the absorbance of the material. Generally, using three wavelengths reduces measurement errors caused by the particle size of the cover, resulting in more accurate measurements than single-wavelength measurements, thus achieving the effect of detecting snow cover thickness.

[0003] Patent CN113932722A discloses a multispectral non-contact snow detection device. However, the aforementioned patent lacks protection for the multispectral detector. Once the multispectral detector is exposed, it is easily subject to impact. Furthermore, the device is inconvenient to move and cannot be installed on vehicles, resulting in a significant reduction in the detection range. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a multispectral non-contact snow detection device that can be installed on the truck bed of a car and moves with the car, thereby increasing the detection range. It also has an external protective structure that can act as a buffer after being impacted, thereby increasing safety.

[0005] This invention is achieved through the following technical solution: a multispectral non-contact snow accumulation detection device, comprising a top plate, a protective cylinder, and a multispectral detector. The bottom surface of the top plate has an axially oriented groove, in which a movable plate is slidably installed. A central block is mounted on the bottom surface of the movable plate. The top surface of the protective cylinder has a through hole, through which the protective cylinder is fitted onto the outside of the central block. Multiple damping springs are mounted on the outer ring surface of the central block, with the other ends of each damping spring mounted on the inner wall of the through hole. A telescopic rod is vertically mounted on the bottom surface of the central block. The multispectral detector is mounted on... Mounted on the bottom surface of the telescopic rod, the movable plate has positioning holes on both sides, into which positioning rods are inserted. Both ends of the positioning rods are mounted on the inner wall of the groove, and each positioning rod is fitted with a tension spring. One end of each tension spring is mounted on the inner wall of the groove, and the other end is mounted on the movable plate. The tension springs are all in a stretched state. A thickened part protrudes from the top surface of the top plate, and a positioning mechanism for positioning the movable plate is installed in the thickened part. Support plates are vertically mounted on both sides of the top plate, and clamping mechanisms are installed at the lower ends of the support plates. An L-shaped plate is installed at the end of the top plate away from the protective cylinder.

[0006] As a preferred technical solution, the positioning mechanism includes a positioning plate, a pull rope, a pull ring, and multiple cylindrical springs. The top surface of the groove is provided with a positioning groove opposite the thickened part. The upper end of the positioning groove extends into the thickened part. One end of the positioning plate is inserted into the positioning groove and is equipped with a connecting ear. The other end extends into the groove. The end of the positioning plate located in the groove is arranged in an arc shape. All cylindrical springs are installed between the positioning plate and the positioning groove. The top surface of the thickened part is provided with a wiring hole communicating with the positioning groove. One end of the pull rope passes through the wiring hole and is installed on the connecting ear. The other end is fixedly connected to the pull ring.

[0007] As a preferred technical solution, the clamping mechanism includes a U-shaped plate, a clamping plate, a screw, a bearing, a handwheel, and a slider. The U-shaped plate is installed on the bottom surface of the support plate, the clamping plate is set inside the U-shaped plate, the bearing is embedded in the middle of the clamping plate, and the inner side of the U-shaped plate is provided with screw holes opposite to the inner ring of the bearing. The screw is threaded into the screw holes, one end of the screw is installed in the inner ring of the bearing, and the other end is fixedly connected to the handwheel. The top surface inside the U-shaped plate is provided with a sliding groove, and the slider is slidably installed in the sliding groove. The lower end of the slider is installed on the clamping plate.

[0008] As a preferred technical solution, the inner wall surface of the lower end of the L-shaped plate is flush with the end face of the lower opening of the protective cylinder.

[0009] As a preferred technical solution, a monocular vision sensor is embedded in the front side of the protective cylinder. The monocular vision sensor is installed at an angle of 45-60 degrees downwards.

[0010] As a preferred technical solution, a data processing terminal is configured to communicate with the monocular vision sensor to process the image data collected by the monocular vision sensor and obtain the type of the object to be detected in front.

[0011] As a preferred technical solution, the data processing terminal communicates with the vehicle's ECU system and draws a snow distribution map based on the driving data and positioning data fed back by the ECU system, as well as the type of the object to be detected ahead and the data collected by the multispectral detector.

[0012] The beneficial effects of this invention are as follows: This invention has a simple structure. The clamping mechanism can fix the device to the rear of the truck bed, allowing the device to move with the truck, thus increasing the detection range. The multispectral detector is equipped with a protective cylinder on the outside. In the event of a minor impact, the protective cylinder can move and compress the damping spring, which acts as a buffer. Once the impact force exceeds the positioning plate, the tension spring can move the protective cylinder and the multispectral detector backward, allowing the multispectral detector to move into the interior of the truck bed and be blocked by the L-shaped plate below, further avoiding impact and ensuring the safety of the multispectral detector. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0015] Figure 2 for Figure 1 A partial sectional view at point AA in the middle;

[0016] Figure 3 for Figure 1 A magnified view of B in the middle.

[0017] In the diagram: 1-Top plate; 2-Multispectral analyzer; 3-Protective cylinder; 4-Center block; 5-Telescopic rod; 6-Moving plate; 7-Damping spring; 8-Thickened part; 9-Pull ring; 11-Pull rope; 12-Positioning plate; 13-Support plate; 14-Tension spring; 15-L-shaped plate; 16-Slider; 17-Handwheel; 18-Screw; 19-U-shaped plate; 21-Slide groove; 22-Clamping plate; 23-Bearing; 24-Positioning rod; 25-Cylindrical spring. Detailed Implementation

[0018] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0019] All features disclosed in this specification, or all steps in all disclosed methods or processes, may be combined in any way, except for mutually exclusive features and / or steps.

[0020] Any feature disclosed in this specification (including any appended claims, abstract, and drawings) may be replaced by other equivalent or similar features for a similar purpose, unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is merely one example of a series of equivalent or similar features.

[0021] like Figures 1-3As shown, a multispectral non-contact snow detection device of the present invention includes a top plate 1, a protective cylinder 3, and a multispectral detector 2. The bottom surface of the top plate 1 has an axially oriented groove, in which a movable plate 6 is slidably installed. A central block 4 is installed on the bottom surface of the movable plate 6. The top surface of the protective cylinder 3 has a through hole, through which the protective cylinder 3 is fitted onto the outside of the central block 4. Multiple damping springs 7 are installed on the outer ring surface of the central block 4, with the other ends of each damping spring 7 installed on the inner wall of the through hole. A telescopic rod 5 is vertically installed on the bottom surface of the central block 4, and the multispectral detector 2 is installed on the bottom surface of the telescopic rod 5. Positioning holes are provided on both sides of the movable plate 6, and a multispectral detector 2 is inserted into each positioning hole. Positioning rod 24, both ends of which are installed on the inner wall of the groove. Each positioning rod 24 is fitted with a tension spring 14, one end of which is installed on the inner wall of the groove and the other end of which is installed on the moving plate 6. The tension spring 14 is in a stretched state. A thickened part 8 is protruding from the top surface of the top plate 1. A positioning mechanism for positioning the moving plate 6 is installed in the thickened part 8. Support plates 13 are vertically installed on both sides of the top plate 1. A clamping mechanism is installed at the lower end of each support plate 13. An L-shaped plate 15 is installed at the end of the top plate 1 away from the protective cylinder. The multispectral detector can be moved downward by the telescopic rod, so that the multispectral detector can be moved to the outside of the protective cylinder, which facilitates maintenance.

[0022] In this embodiment, the positioning mechanism includes a positioning plate 12, a pull rope 11, a pull ring 9, and multiple cylindrical springs 25. The top surface of the groove is provided with a positioning groove opposite the thickened part. The upper end of the positioning groove extends into the thickened part. One end of the positioning plate 12 is inserted into the positioning groove and is equipped with a connecting ear. The other end extends into the groove. The end of the positioning plate 12 located in the groove is arranged in an arc shape. The cylindrical springs 25 are all installed between the positioning plate 12 and the positioning groove. The top surface of the thickened part 8 is provided with a wiring hole communicating with the positioning groove. One end of the pull rope 11 passes through the wiring hole and is installed on the connecting ear. The other end is fixedly connected to the pull ring 9. When not in use, the pull ring can be pulled upward. The movement of the pull ring drives the pull rope, which in turn drives the positioning plate. After the positioning plate is retracted into the positioning groove, one side of the moving plate will be unobstructed. The rebound of the spring can move the moving plate, the protective cylinder, and the multispectral detector backward, so that the opening at the lower end of the protective cylinder is sealed by the L-shaped plate, ensuring safety when not in use.

[0023] In this embodiment, the clamping mechanism includes a U-shaped plate 19, a clamping plate 22, a screw 18, a bearing 23, a handwheel 17, and a slider 16. The U-shaped plates 19 are all installed on the bottom surface of the support plate 13, the clamping plates 22 are all located inside the U-shaped plates, and the bearings 23 are all embedded in the middle of the clamping plates 22. The inner side of the U-shaped plates 19 is provided with screw holes opposite to the inner ring of the bearings, and the screws 18 are all threaded into the screw holes. One end of the screws 18 is installed in the inner ring of the bearings 23, and the other end is fixedly connected to the handwheel 17. The top surface inside the U-shaped plates 19 is provided with a sliding groove 21, and the sliders 16 are all slidably installed in the sliding grooves. The lower end of the sliders 16 is installed on the clamping plates 22. The sliders and sliding grooves can limit the clamping plates, so that the clamping plates can only move back and forth along the sliding grooves, thus preventing the clamping plates from rotating.

[0024] In this embodiment, the inner wall surface of the lower end of the L-shaped plate 15 is flush with the end face of the lower opening of the protective cylinder 3, so that the protective cylinder can be moved onto the L-shaped plate and sealed by the L-shaped plate.

[0025] In this embodiment, a monocular vision sensor is embedded in the front side of the protective cylinder 3. The monocular vision sensor is installed at an angle of 45-60 degrees downwards and is used to acquire images of the object to be detected in front.

[0026] In this embodiment, a data processing terminal is configured to communicate with the monocular vision sensor and the vehicle's ECU system, and includes:

[0027] The image recognition module is used to process the image data collected by the monocular vision sensor and obtain the type of the object to be detected in front. Specifically, it has an image recognition model to identify the type of object in the image data, and can quickly distinguish whether the data collected by the current multispectral detector is snow data.

[0028] The snow distribution map drawing module is used to draw a snow distribution map based on driving data and positioning data fed back by the ECU system, as well as the type of object to be detected ahead and data collected by the multispectral detector. Specifically, it first acquires a 3D map of the current area, then calculates the geographical location of the snow based on the driving data and positioning data fed back by the ECU system, marks the snow on the 3D map based on the calculation results, and then draws a 3D model of the snow based on the snow parameters detected by the multispectral detector, and decorates the corresponding snow markings on the 3D map with the drawn 3D model.

[0029] In this specific implementation, the U-shaped plate can be fitted onto the rear panel of the truck bed. Rotating the handwheel drives the screw, causing it to move along the screw hole. This movement of the screw drives the clamping plate, causing it to move along the slide groove until it abuts against the inner side of the rear panel. The clamping plate then locks the device onto the truck bed. After fixing, the L-shaped plate is positioned inside the truck, while the protective cylinder and multispectral detector are located outside the truck bed, facing the ground. The multispectral detector can move with the truck, increasing the detection range.

[0030] Because the multispectral detector is equipped with a protective cylinder, it can move and compress the damping spring when subjected to a slight impact. The compression of the damping spring acts as a buffer. When the impact exceeds the positioning force of the positioning plate, the protective cylinder can push the center block, which in turn drives the moving plate. The moving plate directly presses the arc-shaped part of the positioning plate, pressing the positioning plate into the positioning groove. After the positioning plate is no longer obstructed, the spring can pull the moving plate. The movement of the moving plate drives the center block and the multispectral detector until the multispectral detector moves into the inside of the truck bed. This ensures that the impacting object acts on the truck bed instead of the multispectral detector. The opening at the bottom of the protective cylinder is sealed by the L-shaped plate, ensuring the safety of the multispectral detector.

[0031] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions conceived without inventive effort should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. A multispectral non-contact snow accumulation detection device, characterized by: The device includes a top plate (1), a protective cylinder (3), and a multispectral detector (2). The bottom surface of the top plate (1) has an axially oriented groove, in which a movable plate (6) is slidably installed. A central block (4) is installed on the bottom surface of the movable plate (6). The top surface of the protective cylinder (3) has a through hole, through which the protective cylinder (3) is fitted onto the outside of the central block (4). Multiple damping springs (7) are installed on the outer ring surface of the central block (4), with the other ends of each damping spring (7) installed on the inner wall of the through hole. A telescopic rod (5) is vertically installed on the bottom surface of the central block (4), and the multispectral detector (2) is installed on the bottom surface of the telescopic rod (5). Both sides of the movable plate (6) are equipped with… There are positioning holes, and positioning rods (24) are inserted into each positioning hole. Both ends of the positioning rods (24) are installed on the inner wall of the groove. Each positioning rod (24) is fitted with a tension spring (14). One end of the tension spring (14) is installed on the inner wall of the groove, and the other end is installed on the moving plate (6). The tension springs (14) are all in a stretched state. A thickened part (8) is protruding on the top surface of the top plate (1). A positioning mechanism for positioning the moving plate (6) is installed in the thickened part (8). Support plates (13) are vertically installed on both sides of the top plate (1). A clamping mechanism is installed at the lower end of the support plates (13). An L-shaped plate (15) is installed at the end of the top plate (1) away from the protective cylinder. The clamping mechanism includes a U-shaped plate (19), a clamping plate (22), a screw (18), a bearing (23), a handwheel (17), and a slider (16). The U-shaped plate (19) is installed on the bottom surface of the support plate (13). The clamping plate (22) is set inside the U-shaped plate. The bearing (23) is embedded in the middle of the clamping plate (22). The inner side of the U-shaped plate (19) is provided with screw holes opposite to the inner ring of the bearing. The screw (18) is threaded into the screw holes. One end of the screw (18) is installed in the inner ring of the bearing (23), and the other end is fixedly connected to the handwheel (17). The top surface inside the U-shaped plate (19) is provided with a sliding groove (21). The slider (16) is slidably installed in the sliding groove. The lower end of the slider (16) is installed on the clamping plate (22).

2. The multispectral non-contact snow detection device of claim 1, wherein: The positioning mechanism includes a positioning plate (12), a pull rope (11), a pull ring (9), and multiple cylindrical springs (25). The top surface of the groove is provided with a positioning groove opposite the thickened part. The upper end of the positioning groove extends into the thickened part. One end of the positioning plate (12) is inserted into the positioning groove and is equipped with a connecting ear. The other end extends into the groove. The end of the positioning plate (12) located in the groove is set in an arc shape. The cylindrical springs (25) are all installed between the positioning plate (12) and the positioning groove. The top surface of the thickened part (8) is provided with a wiring hole that communicates with the positioning groove. One end of the pull rope (11) passes through the wiring hole and is installed on the connecting ear. The other end is fixedly connected to the pull ring (9).

3. The multispectral non-contact snow detection device of claim 1, wherein: The inner wall surface at the lower end of the L-shaped plate (15) is flush with the end face of the lower opening of the protective cylinder (3).

4. The multispectral non-contact snow detection device of claim 1, wherein: A monocular vision sensor is embedded in the front side of the protective cylinder (3). The monocular vision sensor is installed at an angle of 45-60 degrees downward.

5. The multispectral non-contact snow detection device of claim 4, wherein: A data processing terminal in communication with the monocular vision sensor is configured to process image data collected by the monocular vision sensor to determine a type of an object in front of the vehicle.

6. The multispectral non-contact snow detection device of claim 5, wherein: The data processing terminal is in communication with an ECU system of the vehicle and generates a snow distribution map based on driving data and positioning data provided by the ECU system, the type of the object in front of the vehicle, and data collected by the multispectral detector.

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