Intelligent electrically-controlled inclined dome near-infrared light source calibration system

Abstract

The invention provides an intelligent electric control inclined dome near-infrared light source calibration system. The system comprises a rack, a console, a vertical electric lifter and a dome light source. The inclined dome light source is an integrally-formed cone, and four halogen lamp cups are evenly distributed on the inclined face and used for guaranteeing the uniformity of the light source. The inclined dome light source is installed on a horizontal moving sleeve frame, the horizontal position can be adjusted, a horizontal moving sleeve is connected with a vertical electric lifter, and the electric lifter is adjusted by measuring the height of a detection sample through a distance measuring sensor so as to adapt to the detection environment. A voltage-stabilized power supply is matched to prevent spectrum drift of the light source, and the controller adjusts the power of the light source and the distance between the light source and the sample according to signals of the distance measuring sensor. The method is used for solving the influence of a near-infrared detection system on detection of surface dazzle light, mirror reflection and unnecessary shadows of crops with different sizes, ensuring the uniformity of a light source and reducing spectral noise interference caused by uneven illumination.

Description

Technical Field

[0001] This invention relates to the fields of near-infrared detection and machine vision technology, specifically to an intelligent electrically controlled tilting dome near-infrared light source calibration system. Background Technology

[0002] In near-infrared spectroscopy analysis, the light source system is an indispensable core component. Current near-infrared detection light source equipment generally suffers from a limitation: it does not support automated adjustment of the light source height, making it difficult to maintain a suitable distance between the sample and the light source in practice. Furthermore, the conventionally used vertically positioned single-point light source structure is prone to glare, specular reflection, and shadowing on the sample surface, all of which adversely affect the accuracy and reliability of near-infrared spectroscopy measurements. Summary of the Invention

[0003] The purpose of this invention is to provide an intelligent electrically controlled tilting dome near-infrared light source calibration system, which solves the problems of glare, specular reflection, and shadows on the surface of the sample due to the inability to automatically calibrate the light source height and the discontinuity of the light pattern in traditional near-infrared spectroscopy detection.

[0004] The technical solution of this invention is an intelligent electrically controlled tilting dome near-infrared light source calibration system, comprising a frame, a control console, a vertical electric lift, and a dome light source. The frame is characterized by comprising several aluminum profile supports, a front cover plate, a rear cover plate, side cover plates, a testing platform, a top plate, and casters. The aluminum profile supports are connected by several crossbeams. The front cover plate has an openable front door for easy insertion and removal of the sample to be tested. The top plate has a rectangular opening surrounded by several circular holes. A cooling fan is bolted to the top plate. The front cover plate, rear cover plate, side cover plates, testing platform, and top plate have circular holes at their four corners with the same inner diameter as the grooves of the aluminum profile supports, which are then fixed to the aluminum profile supports by bolts and pins. A control console is mounted on one side of the testing platform via a crossbar, and the control console is equipped with a DC regulated power supply and controller for the light source. The vertical electric lift includes a motor, coupling, reducer, connecting block, slide rail, and slider. A reducer is located at one end of the slide rail, and the reducer is connected to the motor via the coupling. A movable slider is located on one side of the slide rail. The dome light source includes a lampshade, distance sensor, halogen lamp holder, connecting column, and sleeve. The halogen lamp holder and distance sensor are bolted to the lampshade. One end of the connecting column is threaded to the lampshade, and the other end is pinned to the sleeve. The sleeve is threaded to the slider on the vertical electric lift.

[0005] As a preferred embodiment of the present invention, the ranging sensor detects the height information of the sample to be tested and drives the motor of the vertical electric lift accordingly. The reducer is connected to the motor through a coupling, thereby driving the slider inside the vertical electric lift to adjust the height of the dome light source, ensuring that it can flexibly adapt to the needs of different testing occasions and achieve the optimal relative height configuration between the light source and the sample.

[0006] In a preferred embodiment of the present invention, the dome light source halogen lamp cups and the ranging sensor are both fixed to the lamp cover by threaded connections. The included angle between each halogen lamp cup is 90°, ensuring that the light source can provide uniform illumination distribution on the irregular sample surface, and the absolute value of the tilt angle between the halogen lamp cups and the detection stage is 60°, so as to avoid surface glare, specular reflection and unnecessary shadows when detecting the sample.

[0007] As a preferred embodiment of the present invention, the dome light source is mounted on a horizontally movable sleeve. The horizontal movement of the dome light source can be achieved by adjusting the sleeve, which facilitates the adjustment of the detection range.

[0008] As a preferred embodiment of the present invention, the front cover plate, rear cover plate, side cover plate, detection table and top plate in the frame are fixed to the aluminum profile support by bolts and pins to form a closed dark chamber. The surface is coated with black light-absorbing material to avoid the influence of ambient light on the spectral results when performing near-infrared spectral detection.

[0009] As a preferred embodiment of the present invention, the DC regulated power supply is placed on the control console to stabilize the voltage and prevent spectral drift of the generated light source.

[0010] As a preferred embodiment of the present invention, the controller automatically adjusts the power of the light source and the distance between the light source and the sample according to the distance sensor signal, or the power of the light source and the distance between the light source and the sample can be manually adjusted to achieve a detection environment for samples of different sizes.

[0011] As a preferred embodiment of the present invention, the bottom of the frame is equipped with casters, and the aluminum profile bracket is fixed to it by bolts and pins, which facilitates the movement of the equipment and makes it easy to integrate and interface with other types of testing systems.

[0012] Compared with existing technologies, the beneficial effects of this invention are that the halogen lamp cup is tilted at a 60° angle to the detection stage, and the projections of the opposing halogen lamp cups on their center lines coincide. This allows the light patterns emitted by the halogen lamp cups to interleave and compensate for each other, effectively suppressing glare and localized high-brightness point light sources that may appear on the surface of the sample, thereby improving the uniformity of illumination conditions on the sample surface. The tilted dome light source is mounted on a horizontally movable sleeve frame, and its horizontal position can be adjusted. The controller on the control panel can automatically adjust the output power of the light source and its distance from the sample based on the real-time signal provided by the distance sensor built into the dome light source, greatly reducing errors caused by manual operation. Attached Figure Description

[0013] Figure 1 This is an isometric view of an embodiment of the present invention.

[0014] Figure 2 yes Figure 1 Axonometric view of the embodiment with the front cover removed.

[0015] Figure 3 yes Figure 2 Axonometric view of the vertical electric lift and dome light source of the embodiment.

[0016] Figure 4 yes Figure 3 A cross-sectional view of the dome light source in the embodiment.

[0017] Figure 5 yes Figure 1 The schematic diagram of the embodiment.

[0018] In the diagram: 1-Fan, 2-Top plate, 3-Front cover plate, 4-Front door, 5-Aluminum profile bracket, 6-Crossbeam, 7-Side cover plate, 8-Controller, 9-DC regulated power supply, 10-Cast wheel, 11-Sample to be tested, 12-Testing platform, 13-Rear cover plate, 14-Control console, 15-Motor, 16-Reducer, 17-Slide rail, 18-Sleeve, 19-Slider, 20-Coupling, 21-Lamp cover, 22-Connecting column, 23-Connecting block, 24-Halogen lamp cup, 25-Distance sensor. Detailed Implementation

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] like Figures 1-2As shown, the aluminum profile supports 5 of the frame are connected by several crossbeams 6. The front cover plate 3 has an openable front door 4 for easy insertion and removal of the sample 11 to be tested. The top plate 2 has a rectangular opening with several round holes distributed around it. The fan 1 is fixed to the top plate 2 by bolts. The front cover plate 3, rear cover plate 13, side cover plate 7, detection platform 12, and the four corners of the top plate 2 have round holes with the same inner diameter as the grooves of the aluminum profile supports 5. The aluminum profile supports 5 are fixed to the top plate 2 by bolts and pins. A control console 14 is set on one side of the detection platform 12 by a crossbeam 6. The control console 14 is equipped with a DC regulated power supply 9 and a controller 8. The front cover plate 3, rear cover plate 13, side cover plate 7, detection platform 12, and top plate 2 of the frame are fixed to the aluminum profile supports 5 by bolts and pins, forming a closed dark chamber that can effectively block external light sources to avoid the influence of ambient light on the spectral results during near-infrared spectroscopy detection. A DC regulated power supply 9 is placed on the control console 14 to stabilize the voltage and prevent spectral drift of the light source. Casters 10 are installed at the bottom of each frame, and aluminum profile brackets 5 are fixed to them with bolts and pins for easy movement.

[0021] like Figure 3 As shown, a reducer 16 is provided at one end of the slide rail 17 of the vertical electric lift. The reducer 16 is connected to the motor 15 via a coupling 20. A movable slider 19 is provided on one side of the slide rail 17. The halogen lamp cup 24 and the distance sensor 25 are fixed to the lamp cover 21 by threaded connection. One end of the connecting column 22 is fixed to the lamp cover 21 by threaded connection, and the other end is connected to the sleeve 18 by a pin. The sleeve 18 is fixed to the slider 19 on the vertical electric lift by threaded connection. The dome light source is installed on the horizontally movable sleeve 18. By adjusting the sleeve 18, the horizontal movement of the dome light source can be realized, increasing the detection range. The distance sensor 25 transmits the height of the sample 11 to the controller 8. The controller 8 drives the motor 15 of the vertical electric lift to work. The reducer 16 is connected to the motor 15 via the coupling 20, thereby driving the slider 19 on the inner side of the vertical electric lift to adjust the height of the dome light source to adapt to the detection environment.

[0022] like Figure 4 As shown, a distance sensor 25 is bolted to the top of the lampshade 21 in the dome light source. Four halogen lamp cups 24 are installed inside the lampshade 21. The included angle between each halogen lamp cup 24 is 90° and the absolute value of the tilt angle between the halogen lamp cup 24 and the detection stage 12 is 60°. The projections on the center lines of the halogen lamp cups 24 coincide, so that the light patterns emitted by the halogen lamp cups 24 are mutually interleaved and compensated to avoid surface glare, specular reflection and unnecessary shadows on the sample to be tested.

[0023] like Figure 5As shown in Figure 1, when the dome light source is a vertical light source, the illumination is as shown in Figure 2, and the surface of the object under test will exhibit surface glare. When the dome light source is a single tilted light source, the illumination is as shown in Figure 3, and the surface of the object under test will exhibit incomplete illumination coverage and more shadows on the side without the light source. When the dome light source is a multi-tilted light source, the illumination is as shown in Figure 4, and the surface of the object under test will be uniformly illuminated.

[0024] The working principle of this invention is explained below. Before performing near-infrared spectroscopy detection, the DC regulated power supply 9 and controller 8 are turned on. Then, the front door 4 on the front cover 3 is opened, and the sample to be tested 11 is placed in. Subsequently, the distance sensor 25 in the dome light source detects the height of the sample 11 and transmits it to the controller 8. The controller 8 drives the slider 19 through the motor 15 and the reducer 16 to adjust the height of the dome light source. The included angle between the halogen lamp cups 24 in the lamp cover 21 is 90°, and the absolute value of the tilt angle between the halogen lamp cups 24 and the detection stage 12 is 60°. This achieves the purpose of the light source covering the surface of the sample being tested, effectively preventing problems such as glare, specular reflection, and unnecessary shadows on the surface of the sample being tested caused by a single light source or a vertical light source.

Claims

1. A tilting dome near-infrared light source system for automatic calibration of electric lifting, comprising a frame, a control console, a vertical electric lift, and a dome light source.

2. The tilting dome light source system for electric lifting and automatic calibration according to claim 1, characterized in that: The frame includes several aluminum profile supports, a front cover plate, a rear cover plate, side cover plates, a testing platform, a top plate, and casters. The aluminum profile supports are connected by several crossbeams. The front cover plate has an openable front door for easy insertion and removal of the items to be tested. The front cover plate, rear cover plate, side cover plates, testing platform, and top plate have round holes at their four corners with the same inner diameter as the grooves of the aluminum profile supports, which are then fixed to the aluminum profile supports by bolts and pins.

3. The tilting dome light source system for electric lifting and automatic calibration according to claim 2, characterized in that: The control console is connected to the testing platform via a crossbar, and is equipped with a DC regulated power supply and a controller.

4. A near-infrared light source system for an electrically operated, lifting, and automatically calibrated tilting dome according to claim 3, characterized in that: The vertical electric lift includes a motor, coupling, reducer, connecting block, slide rail and slider. The reducer is installed at one end of the slide rail and is connected to the motor through the coupling. A movable slider is provided on one side of the slide rail.

5. A near-infrared light source system for an electrically operated, lifting, and automatically calibrated tilting dome according to claim 4, characterized in that: The dome light source includes a lampshade, a distance sensor, halogen lamp cups, a connecting column, and a sleeve. The halogen lamp cups and the distance sensor are fixed to the lampshade by bolts. The included angle between each halogen lamp cup is 90° and the absolute value of the tilt angle between the halogen lamp cup and the detection platform is 60°. One end of the connecting column is fixed to the lampshade by a threaded connection, and the other end is connected to the sleeve by a pin. The sleeve is fixed to the slider on the vertical electric lift by a threaded connection.

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