White light color sensor

Abstract

The white light color sensor comprises an outer shell, the side wall of the outer shell is provided with a display screen assembly and a window, and a window sheet is pasted at the window; a lens group bracket, an optical transmitting system and an optical receiving system are arranged in the outer shell; in conclusion, according to the utility model, the white light LED lamp source is adopted to replace the traditional three-color LED, so that the color identification with wider spectrum and higher precision is realized; a compact and optimized optical structure and an adjustable focal length mechanism are matched, so that the measurement range and the adaptability of the sensor are remarkably improved; meanwhile, through cooperative control of software and hardware, the light emitting intensity can be automatically adjusted according to the colors and reflectivity of different detected objects, the operation complexity is reduced, the detection stability and the use convenience of a user are improved, and the method is particularly suitable for detection scenes with various colors, sizes and surface characteristics remarkably different.

Description

Technical Field

[0001] This utility model belongs to the field of color sensor technology, specifically relating to a white light color sensor. Background Technology

[0002] Color sensors are widely used in industrial automation, logistics sorting, food packaging, printing inspection, and other fields to identify and analyze color information on object surfaces. In existing technologies, color sensors typically use three monochromatic LED light sources: red, green, and blue (RGB). Each color light source is illuminated sequentially to illuminate the object being measured, and a photosensitive receiving device detects the intensity of the reflected light to determine the color. However, this RGB time-division illumination method has several shortcomings: firstly, the spectral overlap between different color light sources is limited, resulting in discontinuous overall spectral coverage and affecting the accuracy of color recognition; secondly, the structure of the three-color LEDs is complex, the control logic is cumbersome, and the dimming and focusing processes rely heavily on manual operation, making it difficult to meet the automated detection needs under diverse working conditions. Utility Model Content

[0003] The present invention aims to provide a white light color sensor to solve the technical problems existing in the current color sensor.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] A white light color sensor includes a housing, with a display screen assembly and a window on the side wall of the housing, and a window sheet attached to the window; the housing contains a lens bracket, an optical emission system, an optical receiving system, a first PCBA board, a second PCBA board and a third PCBA board;

[0006] The mirror assembly bracket is fixed inside the outer shell. The optical transmitting system and the optical receiving system are both mounted on the mirror assembly bracket, which is provided with an optical transmitting channel and an optical receiving channel.

[0007] The second PCBA board integrates a white LED light source, and the second PCBA board is also equipped with a light source cover that covers the white LED light source. The light source cover is provided with a light outlet aperture, which corresponds to the optical emission channel.

[0008] An optical emission system includes an emission lens group adjustment tube and a focal length adjustment assembly. The emission lens group adjustment tube is located within the optical emission channel, and the focal length adjustment assembly is used to drive the emission lens group adjustment tube to slide along the axial direction of the optical emission channel to achieve focal length adjustment. An emission lens is installed at the end of the emission lens group adjustment tube.

[0009] An optical receiving system includes a filter and a receiving lens, which are respectively installed at both ends of the optical receiving channel; the third PCBA board integrates a photosensitive receiving element, which is located near the filter;

[0010] A fixed bracket corresponding to the window is also installed on the end face of the lens assembly bracket. The fixed bracket has two round holes, which correspond to the ends of the optical emission channel and the optical receiving channel, respectively.

[0011] The display assembly, the first PCBA board and the second PCBA board are interconnected through the first flexible printed circuit board, the second PCBA board and the third PCBA board are connected through the second flexible printed circuit board, and the second PCBA board is also connected to the third flexible printed circuit board.

[0012] The outer casing is provided with a setting key that connects to a third flexible printed circuit board.

[0013] Furthermore, the third flexible printed circuit board is also equipped with indicator lights, and the housing is fitted with indicator light covers corresponding to the indicator lights.

[0014] Furthermore, the display assembly includes a display module bracket installed in the housing, a display mounting window on the side wall of the housing, a display module mounted on the display module bracket, the display module corresponding to the display mounting window, a display film on the display module, and a display cover plate affixed to the display mounting window;

[0015] The outer casing is also provided with two selection keys located below the display cover. The two selection keys are connected to the display module. The display module, the first PCBA board and the second PCBA board are interconnected through the first flexible printed circuit board.

[0016] Furthermore, the focus adjustment assembly includes a key plate and a U-shaped adjustment bracket. The lens assembly bracket is provided with a U-shaped slide, and the adjustment bracket is fitted onto the U-shaped slide and can move along the radial direction of the optical emission channel on the U-shaped slide. The U-shaped slide has two elongated holes, which are located above and below the optical emission channel, respectively. The upper and lower sides of the adjustment bracket are provided with corresponding oblique holes, which correspond to the two elongated holes. The upper and lower outer walls of the emission lens assembly adjustment cylinder are both fixed with protruding posts, which are inserted into the corresponding elongated holes and oblique holes.

[0017] The adjustment bracket is equipped with a focus adjustment metal frame, which has a threaded hole. The key plate is fixed to the inner wall of the outer shell. The setting key is set on the key plate. A knob is also rotatably installed on the key plate. The end of the knob is a stud structure and is threaded into the threaded hole.

[0018] Furthermore, the outer casing includes a top cover and a base, the top cover being fastened to the base, and the base having cavities for mounting the various components.

[0019] Furthermore, insulating sheets are provided at the bottom of both the top cover and the base.

[0020] Compared with existing technologies, the advantages of this invention are as follows: By using a white LED light source instead of a traditional three-color LED, this invention achieves a wider spectrum and higher precision color recognition; combined with a compact and optimized optical structure and an adjustable focal length mechanism, it significantly improves the measurement range and adaptability of the sensor; at the same time, through hardware and software collaborative control, it can automatically adjust the light intensity according to the color and reflectivity of different measured objects, reducing operational complexity, improving detection stability and user convenience, and is particularly suitable for detection scenarios with significant differences in color, size and surface characteristics. Attached Figure Description

[0021] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0022] Figure 1 This is an isometric view of the white light color sensor of this utility model;

[0023] Figure 2 This is an isometric view of the white light color sensor of this utility model from another perspective;

[0024] Figure 3 This is an exploded view of the white light color sensor of this utility model;

[0025] Figure 4 A schematic diagram of the white light color sensor after removing the outer casing;

[0026] Figure 5 Exploded view of the lens assembly support, optical transmitting system, and optical receiving system;

[0027] Figure 6 A cross-sectional view of the lens assembly support, optical transmitting system, and optical receiving system;

[0028] Figure 7 This is an exploded view of the display assembly. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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.

[0030] The present invention will be further described in detail below with reference to the embodiments.

[0031] like Figure 1-4 As shown, this embodiment provides a white light color sensor, including a housing 1, a display screen assembly 2, a lens bracket 3, an optical emission system, an optical receiving system, three circuit boards (first PCBA board 7, second PCBA board 8, and third PCBA board 9), a setting key 10, a knob 11, and multiple flexible printed circuit boards. The specific structure is as follows:

[0032] 1. Specific structure of outer shell 1

[0033] The outer casing 1 includes an upper cover 13 and a base 14. The upper cover 13 and the base 14 are fastened together to form a closed structure. The base 14 has a cavity for installing various components. To ensure circuit safety, an insulating sheet 15 is provided on the inner bottom of both the upper cover 13 and the base 14.

[0034] The side wall of the outer casing 1 is provided with a window 16 and a display screen mounting window 17. A window piece 18 is attached to the window 16 for emitting white light and receiving reflected light. The display screen assembly 2 is installed inside the display screen mounting window 17.

[0035] 2. Optical System Structure

[0036] An optical lens assembly bracket 3 is fixedly installed inside the outer casing 1. The optical lens assembly bracket 3 is provided with an optical emission channel 19 and an optical receiving channel 20, which are used to accommodate the optical emission system and the optical receiving system.

[0037] The second PCBA board 8 integrates a white LED light source to replace the traditional RGB light source and directly emit white light covering a wider wavelength range;

[0038] The light source cover 22 is installed on the second PCBA board 8 to cover the white LED light source and is used for light guiding and light shielding.

[0039] The light exit aperture 23 is set on the light source cover 22 to restrict and shape the light output shape, making the light beam more focused and stable.

[0040] (1) The optical emission system mainly includes an adjusting cylinder 24 for the emitting lens group and a focal length adjustment assembly; the adjusting cylinder 24 for the emitting lens group is set in the optical emission channel 19 of the lens group support 3, and an emitting lens 26 is installed at the end for secondary focusing of white light; the focal length adjustment assembly includes an adjustment bracket 27, a focal length adjustment metal frame 28, a key plate 29 and a knob 11, which are used to push the adjusting cylinder 24 to slide along the axial direction of the optical emission channel 19, thereby changing the focusing position and realizing manual adjustment of the focal length and size of the light spot. Specifically, the lens group support 3 The upper part is provided with a U-shaped slide rail 30, and the adjusting bracket 27 is fitted on the U-shaped slide rail 30 and can move along the radial direction of the optical emission channel 19 on the U-shaped slide rail 30; the U-shaped slide rail 30 is provided with two elongated holes, which are located above and below the optical emission channel 19 respectively; the upper and lower sides of the adjusting bracket 27 are respectively provided with oblique holes 32, which correspond to the two elongated holes; the upper and lower outer walls of the emission lens assembly adjusting cylinder 24 are both fixed with protruding posts 33, which are inserted into the corresponding elongated holes and oblique holes 32;

[0041] The adjustment bracket 27 is equipped with a focus adjustment metal frame 28, which has a threaded hole 34. A key plate 29 is fixed to the inner wall of the outer shell 1. A knob 11 is also rotatably mounted on the key plate 29. The end of the knob 11 is a stud structure, and the end of the knob 11 is threaded into the threaded hole 34. Turning the knob 11 causes it to rotate. Since the knob 11 is restricted to the key plate 29, it can only rotate and cannot move along its axial direction. Therefore, the rotation of the knob 11 will drive the focus adjustment metal frame 28 to move axially through the thread, thereby pulling the adjustment bracket 27. The adjustment bracket 27 moves on the U-shaped slide 30 and finally pushes the protruding post 33 to move along the elongated hole through the oblique hole 32, so that the emission lens assembly adjustment cylinder 24 slides axially along the optical emission channel 19, thereby changing the focusing position.

[0042] (2) An optical receiving system is set in the optical receiving channel 20 of the lens group bracket 3, including a receiving lens 35 and a filter 36, which are respectively installed at the front end and the rear end of the optical receiving channel 20. The former is used to collect the light reflected back from the object under test, and the latter is used for wavelength screening. The third PCBA board 9 has a photosensitive receiving element integrated near the filter 36, which can receive the effective reflected light signal through the filter 36.

[0043] A fixed bracket 38 is installed between the lens assembly bracket 3 and the external window 16. The fixed bracket 38 has two round holes 39, which correspond to the entrances and exits of the optical transmission channel 19 and the optical reception channel 20, respectively, and serve as a structure to limit the position of the transmitting lens 26 and the receiving lens 35 and prevent them from falling out.

[0044] 3. Control and display screen components

[0045] (1) The first PCBA board 7 is connected to the display assembly 2 and is used to drive the display; the second PCBA board 8 is the main control board, which drives the white LED and realizes signal adjustment and communication; the third PCBA board 9 receives the reflected light signal.

[0046] The display assembly 2, the first PCBA board 7, and the second PCBA board 8 are interconnected via the first flexible printed circuit board 40. The second PCBA board 8 and the third PCBA board 9 are connected via the second flexible printed circuit board 41. The second PCBA board 8 is also connected to the third flexible printed circuit board 42.

[0047] (2) Display panel assembly 2

[0048] The display assembly 2 includes a display module bracket 43 installed inside the housing 1; the side wall of the housing 1 is provided with a display installation window 17, the display module bracket 43 is provided with a display module 44, the display module 44 corresponds to the display installation window 17, the display module 44 is provided with a display film 45, and a display cover plate 46 is pasted on the display installation window 17.

[0049] The outer casing 1 is also provided with two selection keys 47 located below the display cover 46. The two selection keys 47 are connected to the display module 44 and are used for user parameter setting or menu operation. The display module 44, the first PCBA board 7 and the second PCBA board 8 are interconnected through the first flexible printed circuit board 40.

[0050] 4. Human-computer interaction components

[0051] The outer casing 1 is provided with a setting key 10, which is mounted on the key plate 29 and connected to the second PCBA board 8 via a third flexible printed circuit board 42. The third flexible printed circuit board 42 is also provided with an indicator light 48 for working status feedback, and the outer casing 1 is provided with a matching indicator light cover 49 to achieve visual prompting and diffusion effects.

[0052] In this embodiment, the white light color sensor uses a single white LED light source instead of the traditional red, green, and blue LED lights. The emitted white light has a continuous and broad spectral distribution, which is beneficial for more accurate identification and differentiation of reflected light of different colors on the surface of an object. It is especially suitable for detection scenarios with high requirements for color detail changes.

[0053] To further enhance detection performance, this embodiment employs a compact and highly integrated optical design. Specifically:

[0054] The lens assembly bracket 3 integrates an optical transmission channel 19 and an optical receiving channel 20, and arranges components such as a transmitting mirror 26, a receiving lens 35, and a filter 36 within a limited space to ensure efficient optical path transmission within a limited installation space.

[0055] The adjusting cylinder 24 of the transmitting lens group slides axially within the lens group bracket 3, and with the cooperation of the adjusting bracket 27 and the knob 11 mechanism, the focal length of the transmitting lens group can be dynamically adjusted.

[0056] Users can adjust the system's focal length using knob 11, thereby changing the focal length and diameter of the emitted light spot to adapt to detection objects of different sizes and reflectivity, achieving unified coverage detection of small samples at close range and large targets at long range.

[0057] Furthermore, to further enhance ease of use and measurement accuracy, this embodiment introduces an automatic light intensity adjustment algorithm based on feedback signals into the hardware and software system: the photosensitive receiving element on the third PCBA board 9 can sense the light intensity reflected by the object under test in real time; the second PCBA board 8 autonomously adjusts the driving current of the white LED light source according to the change in the intensity of the recovered light signal; when the target color is detected to be dark or the surface reflectivity is low, the light intensity is automatically increased; otherwise, it is automatically reduced to avoid overexposure or energy waste; the entire process of adjusting the light intensity does not require manual intervention from the user, improving the user experience and system adaptability, and ensuring the uniformity of illumination and measurement accuracy in various detection scenarios.

[0058] It should be noted that, in this document, terms such as “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 process, method, article, or apparatus.

[0059] 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 alterations 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 white light color sensor, characterized in that, The device includes an outer casing, with a display screen assembly and a window on the side wall of the casing, and a window panel attached to the window; the outer casing contains a lens assembly bracket, an optical transmitting system, an optical receiving system, a first PCBA board, a second PCBA board, and a third PCBA board; The mirror assembly bracket is fixed inside the outer shell. The optical transmitting system and the optical receiving system are both mounted on the mirror assembly bracket, which is provided with an optical transmitting channel and an optical receiving channel. The second PCBA board integrates a white LED light source, and the second PCBA board is also equipped with a light source cover that covers the white LED light source. The light source cover is provided with a light outlet aperture, which corresponds to the optical emission channel. An optical emission system includes an emission lens group adjustment tube and a focal length adjustment assembly. The emission lens group adjustment tube is located within the optical emission channel, and the focal length adjustment assembly is used to drive the emission lens group adjustment tube to slide along the axial direction of the optical emission channel to achieve focal length adjustment. A transmitting mirror is installed at the end of the adjusting cylinder of the transmitting mirror assembly; An optical receiving system includes a filter and a receiving lens, which are respectively installed at both ends of the optical receiving channel; the third PCBA board integrates a photosensitive receiving element, which is located near the filter; A fixed bracket corresponding to the window is also installed on the end face of the lens assembly bracket. The fixed bracket has two round holes, which correspond to the ends of the optical emission channel and the optical receiving channel, respectively. The display assembly, the first PCBA board and the second PCBA board are interconnected through the first flexible printed circuit board, the second PCBA board and the third PCBA board are connected through the second flexible printed circuit board, and the second PCBA board is also connected to the third flexible printed circuit board. The outer casing is provided with a setting key that connects to a third flexible printed circuit board.

2. The white light color sensor according to claim 1, characterized in that: The third flexible printed circuit board is also equipped with an indicator light, and an indicator light cover corresponding to the indicator light is installed on the housing.

3. The white light color sensor according to claim 2, characterized in that: The display assembly includes a display module bracket installed in the housing, a display mounting window on the side wall of the housing, a display module on the display module bracket, a display module corresponding to the display mounting window, a display film on the display module, and a display cover plate affixed to the display mounting window. The outer casing is also provided with two selection keys located below the display cover. The two selection keys are connected to the display module. The display module, the first PCBA board and the second PCBA board are interconnected through the first flexible printed circuit board.

4. The white light color sensor according to claim 3, characterized in that: The focus adjustment assembly includes a key plate and a U-shaped adjustment bracket. The lens assembly bracket is provided with a U-shaped slide, and the adjustment bracket is fitted onto the U-shaped slide and can move along the radial direction of the optical emission channel on the U-shaped slide. The U-shaped slide has two elongated holes, which are located above and below the optical emission channel, respectively. The upper and lower sides of the adjustment bracket are provided with corresponding oblique holes, which correspond to the two elongated holes. The upper and lower outer walls of the emission lens assembly adjustment cylinder are fixed with protruding posts, which are inserted into the corresponding elongated holes and oblique holes. The adjustment bracket is equipped with a focus adjustment metal frame, which has a threaded hole. The key plate is fixed to the inner wall of the outer shell. The setting key is set on the key plate. A knob is also rotatably installed on the key plate. The end of the knob is a stud structure and is threaded into the threaded hole.

5. The white light color sensor according to claim 4, characterized in that: The outer casing includes a top cover and a base, with the top cover fastened to the base, and the base having cavities for mounting the various components.

6. The white light color sensor according to claim 5, characterized in that: Insulating sheets are provided on both the top cover and the bottom of the base.

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