Optical-based color sensor

Abstract

The utility model discloses a color sensor based on optics, and belongs to the field of color sensors. A color sensor based on optics comprises a machine body, a lens is arranged on the left side of the machine body, the lens is in a step shape, each step can be parallel to the collecting end of the machine body after ascending and descending, and guide rails are fixedly connected to the front face and the back face of the machine body. The front face and the back face of the lens are fixedly connected with sliding blocks located in the guide rails, the sliding blocks are slidably connected with the guide rails, and the front face and the back face of the lens are fixedly connected with vertical plates. By designing the step-shaped lens and the lifting mechanism, the sensor can select different lens thicknesses according to needs so as to cope with different light conditions and improve the accuracy of color recognition, the lens is kept parallel to the collecting end after lifting, and it is ensured that light can stably enter the sensor through the lens. And light distortion or scattering caused by lens inclination is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to color sensor technical field especially, it relates to a kind of color sensor based on optics. BACKGROUND

[0002] Color sensor, also known as color recognition sensor or color sensor, is an electronic device that can detect the color of an object and convert it into an electrical signal output. The working principle of color sensor is based on the phenomenon that photons bombard the surface of a metal to produce electron flow. When light energy in the form of photons bombards the surface of a metal, free electrons on the surface of the metal are excited and jump out of the metal lattice, resulting in the flow of electrons or current. The amount of current generated depends on the energy of the photons or the wavelength of the incident light, which is the method of calculating the wavelength of reflected light.

[0003] According to the patent application number 201980024653.4 disclosed by China Patent Network, the patent name is: calibration brightness estimation using ambient color sensor, which includes obtaining a reference color measurement indicating the amount of ambient light, and clustering the reference color measurement, and storing cluster parameters for the clustered color measurement. The method can also include automatic calculation of a general transformation parameter for the conversion of color measurements to calibrated color values for each cluster. In another example, a method can include exposing an ambient color sensor to a calibration ambient lighting, calculating sensor correction parameters for the ambient color sensor, and storing the calculated parameters. As an additional example, an electronic device is adapted to determine calibrated color values using a machine-readable medium that stores cluster parameters, sensor correction parameters, and general transformation parameters used by the electronic device to calculate calibrated color values for ambient color sensor measurements.

[0004] However, the existing color sensor mainly performs simple color judgment, and cannot perform gray level recognition. In some fields that require accurate measurement of objects, such as image processing or machine vision, gray error will directly affect the accuracy of measurement. The error is caused by the limitation of the sensitivity of the sensor to light, which makes it difficult to accurately capture and distinguish when the gray level changes. If the external light changes greatly, such as from strong light to weak light, or the color of the light changes, it will have a great impact on the measurement accuracy. Utility model content

[0005] The utility model aims at solving the problem that external light easily affects the identification accuracy of color sensor in the prior art, and proposes a color sensor based on optics.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0007] An optical-based color sensor, comprising a body, the left side of the body is provided with a lens, the shape of the lens is stepped and each step can be parallel to the collection end of the body after lifting, the front and back of the body are fixedly connected with guide rails, the front and back of the lens are fixedly connected with sliding blocks inside the guide rails, the sliding blocks are slidingly connected with the guide rails, the front and back of the lens are fixedly connected with vertical plates, the outer side of the vertical plate is fixedly connected with a slide rod, the front and back of the body are movably connected with cranks through pins, the side away from the body of the crank extends to the outer side of the vertical plate and is sleeved on the surface of the slide rod, the crank can extrude the slide rod to vertically lift and adjust the lens during swinging, and the top of the body is provided with a transmission structure, which can drive the crank to swing.

[0008] As a preferred technical scheme of the present application, the transmission structure comprises a connecting frame fixedly connected to the top of the body, a screw rod movably connected to the inside of the connecting frame through a bearing, a screw sleeve threadedly connected to the surface of the screw rod, and transmission rods fixedly connected to the inside of the crank on both sides of the screw sleeve and slidingly connected with the crank, wherein the screw sleeve can drive the transmission rods to slide in the inside of the crank and extrude the crank to swing during movement.

[0009] As a preferred technical scheme of the present application, the top of the connecting frame is provided with a limiting slot, and the top of the screw sleeve is fixedly connected with a limiting rod inside the limiting slot.

[0010] As a preferred technical scheme of the present application, the left side of the lens is provided with a polarizing mirror, both sides of the body are provided with supports connected with the polarizing mirror, both sides of the body are fixedly connected with support frames, the inside of the support frame is fixedly connected with a guide rod, the support is sleeved on the surface of the guide rod and slidingly connected with the guide rod, and the polarizing mirror can be slidingly displaced on the surface of the guide rod by the support and leveled with the lens of different step thicknesses.

[0011] As a preferred technical scheme of the present application, the surface of the support is fixedly connected with a force rod, the outer side of the sliding block is fixedly connected with a trapezoidal plate, the surface of the trapezoidal plate is inclined, the side away from the support of the force rod is in contact with the inclined surface of the trapezoidal plate, and the trapezoidal plate can extrude the force rod by the inclined surface during descending with the sliding block.

[0012] As a preferred technical scheme of the present application, one side of the support is fixedly connected with a compression spring sleeved on the surface of the guide rod, and the compression spring can support the support by elasticity to reset when the force rod is out of contact with the trapezoidal plate.

[0013] As a preferred technical scheme of the present application, both ends of the polarizer are penetrated through the support and extended to the outside of the support, and the surface of the polarizer is threadedly connected with a nut located outside the support, which can be screwed and extruded to fix the polarizer.

[0014] Compared with the prior art, the utility model provides a color sensor based on optics has the following beneficial effects:

[0015] 1、The color sensor based on optics, through design ladder lens and elevator mechanism, sensor can select different lens thickness according to need, to cope with different light conditions, improve the accuracy of color recognition, lens after lifting and collecting end keep parallel, ensure that light can stably pass through the lens into the sensor, reduce the light distortion or scattering caused by lens tilt.

[0016] 2、The color sensor based on optics, through the thread connection of screw rod and screw sleeve, and the sliding of transmission rod in the crank inside, realize accurate control to lens lifting, make sensor can quickly and accurately adjust lens thickness according to need, the design of transmission structure makes the whole sensor structure more compact, reduce the space occupation, improve the portability and practicality of sensor.

[0017] 3、The color sensor based on optics, through the design of limiting groove and limiting rod effectively prevents the screw sleeve from exceeding the predetermined range during movement, avoids the damage or failure of the sensor caused by the screw sleeve out of position, and the sliding of the limiting rod in the limiting groove also increases the stability of the transmission structure, so that the lifting of the lens is more stable and reliable.

[0018] 4、The color sensor based on optics, through the setting of the polarizer, the light entering the sensor can be further adjusted, the adaptability of the sensor to different light conditions is enhanced, and the accuracy of color recognition is improved, the design of the support and the guide rod makes the polarizer move with the lens, keeps flush with the lens, and ensures that the light can pass smoothly.

[0019] 5、The color sensor based on optics, through the design of force rod and trapezoidal plate realizes the automatic adjustment function of the polarizer, when the lens is lifted, the trapezoidal plate will extrude the force rod, drive the support and the polarizer to move, without manual operation, simplify the operation process of the sensor, improve the usability and user experience of the sensor.

[0020] 6、The color sensor based on optics, through the setting of the compression spring, the support and the polarizer can automatically reset when the trapezoidal plate no longer extrudes the force rod, keep flush with the current lens thickness, the elastic support of the compression spring also increases the stability of the support and the polarizer, reduces the deviation caused by vibration or external interference.

[0021] 7. The optical-based color sensor, by screwing the nut through the thread, the polarizer is fixed by extrusion, which ensures the stability and reliability of the polarizer during the working process of the sensor, the design of the nut also facilitates the replacement and maintenance of the polarizer, improves the maintainability and service life of the sensor. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a structural schematic view of the utility model;

[0023] Figure 2 It is a main view structural schematic view of the utility model;

[0024] Figure 3 It is a local structural schematic view of the utility model;

[0025] Figure 4 It is a local structural main view schematic view of the utility model.

[0026] In the drawing: 1, machine body; 2, lens; 3, guide rail; 4, sliding block; 5, vertical plate; 6, sliding rod; 7, crank; 8, transmission structure; 9, connecting frame; 10, screw; 11, screw sleeve; 12, transmission rod; 13, limit slot; 14, limit rod; 15, polarizer; 16, support; 17, support frame; 18, guide rod; 19, force bar; 20, trapezoidal plate; 21, compression spring; 22, nut. DETAILED DESCRIPTION

[0027] The technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model; obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments, based on the embodiments in the utility model, all other embodiments obtained by the ordinary skill in the art without creative labor belong to the protection scope of the utility model. Embodiment 1:

[0028] Reference Figures 1-4The utility model provides a kind of optical-based color sensor, including body 1, the left side of body 1 is provided with lens 2, the shape of lens 2 is ladder-shaped and each section of ladder can be mutually parallel with the collection end of body 1 after lifting, the front and back of body 1 are fixedly connected with guide rail 3, the front and back of lens 2 are fixedly connected with the slider 4 located in the inside of guide rail 3, slider 4 is slidably connected with guide rail 3, the front and back of lens 2 are fixedly connected with vertical board 5, the outside of vertical board 5 is fixedly connected with slide bar 6, the front and back of body 1 are movably connected with crank 7 by pin shaft, the side of crank 7 away from body 1 extends to the outside of vertical board 5 and is sleeved on the surface of slide bar 6, and crank 7 can extrude slide bar 6 to make it carry lens 2 vertically lift and adjust during oscillation, the top of body 1 is provided with transmission structure 8, transmission structure 8 can drive crank 7 to oscillate, by designing ladder-shaped lens 2 and lifting mechanism, sensor can select the thickness of different lens 2 as required to cope with different light conditions, improve the accuracy of color identification, lens 2 keeps parallel with the collection end after lifting, ensure that light can stably pass through lens 2 into sensor, reduce the light distortion or scattering caused by the inclination of lens 2, transmission structure 8 includes the connecting frame 9 fixedly connected at the top of body 1, the inside of connecting frame 9 is movably connected with screw rod 10 by bearing, the surface of screw rod 10 is threadedly connected with screw sleeve 11, the two sides of screw sleeve 11 are fixedly connected with the transmission rod 12 located in the inside of crank 7, transmission rod 12 is slidably connected with crank 7, screw sleeve 11 can drive transmission rod 12 to slide in the inside of crank 7 and extrude crank 7 to oscillate during movement, the top of connecting frame 9 is provided with limiting groove 13, the top of screw sleeve 11 is fixedly connected with the limiting rod 14 located in the inside of limiting groove 13, the left side of lens 2 is provided with polarizer 15, the two sides of body 1 are provided with support 16 connected with polarizer 15, the two sides of body 1 are fixedly connected with support frame 17, the inside of support frame 17 is fixedly connected with guide rod 18, support 16 is sleeved on the surface of guide rod 18 and is slidably connected with guide rod 18, polarizer 15 can use support 16 to slide displacement on the surface of guide rod 18 and be mutually flush with the lens 2 of different ladder thickness, the surface of support 16 is fixedly connected with force rod 19, the outside of slider 4 is fixedly connected with trapezoidal plate 20, the surface of trapezoidal plate 20 is provided as inclined, the side of force rod 19 away from support 16 is in contact with the inclined surface of trapezoidal plate 20, trapezoidal plate 20 can extrude force rod 19 using inclined surface during descending with slider 4, one side of support 16 is fixedly connected with compression spring 21 sleeved on the surface of guide rod 18, compression spring 21 can support support 16 using elasticity and reset when force rod 19 is out of contact with trapezoidal plate 20, the two ends of polarizer 15 are all penetrated through support 16 and extend to the outside of support 16, the surface of polarizer 15 is threadedly connected with the nut 22 located on the outside of support 16, and nut 22 can be screwed by thread and extrude and fix polarizer 15.

[0029] Specifically, the optical-based color sensor in operation / use: the left side of the body 1 is provided with a stepped lens 2, the thickness of each step is different, and each step can be parallel to the collection end of the body 1 after lifting, the lens 2 is slidably connected with the front guide rail 3 and the rear guide rail 3 of the body 1 through the sliding block 4, the left side of the lens 2 is provided with a polarizing mirror 15, the polarizing mirror 15 is connected with the two sides of the body 1 through the bracket 16, the bracket 16 is sleeved on the guide rod 18 in the supporting frame 17 and can slide along the guide rod 18, when the thickness of the lens 2 needs to be adjusted to cope with different light conditions, the transmission structure 8 is operated to realize, the rotating screw 10 is rotated, the nut 11 is moved on the screw 10. The movement of the nut 11 drives the transmission rod 12 to slide in the crank 7, and then the crank 7 is squeezed to swing, the swing of the crank 7 drives the bracket 16 and the sliding block 4 of the lens 2 to vertically lift on the guide rail 3, so that the lens 2 with different thicknesses is aligned with the collection end of the body 1, and the position of the polarizing mirror 15 also needs to be adjusted accordingly when the thickness of the lens 2 is adjusted. When the lens 2 is lifted, the trapezoidal plate 20 outside the sliding block 4 will follow the descent, the inclined surface thereof presses the force rod 19, the movement of the force rod 19 drives the bracket 16 and the polarizing mirror 15 to slide on the guide rod 18, so that the polarizing mirror 15 is flush with the stepped thickness of the currently selected lens 2, after the lens 2 and the polarizing mirror 15 are adjusted in place, the sensor starts color collection. After the external light is adjusted through the lens 2 and the polarizing mirror 15, it enters the collection end of the body 1 for color recognition and analysis, meeting the use requirements in different environments.

[0030] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. An optical based color sensor comprising a body (1), characterized in that, The left side of the body (1) is provided with a lens (2), the shape of the lens (2) is ladder-shaped, and each ladder step can be parallel to the collection end of the body (1) after lifting, the front and back of the body (1) are fixedly connected with guide rails (3), the front and back of the lens (2) are fixedly connected with sliding blocks (4) inside the guide rails (3), the sliding blocks (4) are slidingly connected with the guide rails (3), the front and back of the lens (2) are fixedly connected with vertical plates (5), the outer side of the vertical plate (5) is fixedly connected with a sliding rod (6), the front and back of the body (1) are movably connected with cranks (7) through pins, the side of the crank (7) away from the body (1) extends to the outer side of the vertical plate (5) and is sleeved on the surface of the sliding rod (6), and the crank (7) can extrude the sliding rod (6) to vertically lift and adjust the lens (2) during swinging.

2. An optical based color sensor according to claim 1, characterized in that, The transmission structure (8) includes a connecting frame (9) fixedly connected to the top of the body (1), a screw rod (10) movably connected inside the connecting frame (9) through a bearing, a screw sleeve (11) threadedly connected to the surface of the screw rod (10), transmission rods (12) fixedly connected to the inside of the crank (7) on both sides of the screw sleeve (11), and the transmission rods (12) slidingly connected with the crank (7), wherein the screw sleeve (11) can drive the transmission rods (12) to slide inside the crank (7) and extrude the crank (7) to swing during movement.

3. An optical based color sensor according to claim 2, wherein, The top of the connecting frame (9) is provided with a limiting groove (13), and the top of the screw sleeve (11) is fixedly connected with a limiting rod (14) inside the limiting groove (13).

4. An optical based color sensor according to claim 1, wherein, The left side of the lens (2) is provided with a polarizing mirror (15), both sides of the body (1) are provided with supports (16) connected with the polarizing mirror (15), both sides of the body (1) are fixedly connected with support frames (17), the inside of the support frame (17) is fixedly connected with guide rods (18), the support (16) is sleeved on the surface of the guide rod (18) and is slidingly connected with the guide rod (18), and the polarizing mirror (15) can slide on the surface of the guide rod (18) by the support (16) and be flush with the lens (2) of different ladder thicknesses.

5. An optical based color sensor according to claim 4, characterized in that, The surface of the support (16) is fixedly connected with a force rod (19), the outer side of the sliding block (4) is fixedly connected with a trapezoidal plate (20), the surface of the trapezoidal plate (20) is inclined, the side of the force rod (19) away from the support (16) is in contact with the inclined surface of the trapezoidal plate (20), and the trapezoidal plate (20) can extrude the force rod (19) by the inclined surface during the descending process of the sliding block (4).

6. An optical based color sensor according to claim 4, wherein, One side of the support (16) is fixedly connected with a compression spring (21) sleeved on the surface of the guide rod (18), and the compression spring (21) can support the support (16) by elasticity to reset when the force rod (19) is out of contact with the trapezoidal plate (20).

7. An optical based color sensor according to claim 4, wherein, Both ends of the polarizing lens (15) are penetrated through the support (16) and extended to the outside of the support (16), the surface of the polarizing lens (15) is threadedly connected with the nut (22) located outside the support (16), the nut (22) can be screwed and extruded fixed to the polarizing lens (15) through the thread.

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