Color sensor

Abstract

A color sensor disclosed by the present invention comprises a glass rod, a stainless steel sheet and an FPC, the outer side of the upper end of the glass rod is connected with a sealing cover, the lower end of the glass rod is provided with a prefabricated groove, the glass rod is internally provided with a first PCB mainboard, and the outer side of the lower end of the first PCB mainboard is electrically connected with an LED lamp bead; a stainless steel sheet is mounted on the outer surface of the lower end of the first PCB mainboard, and an extension sheet is fixedly mounted on the outer side of the rear end of the stainless steel sheet; an FPC (FPC) located outside the first PCB mainboard is installed on the outer side of the lower end of the stainless steel sheet. The invention belongs to the technical field of color sensors, and aims at solving the problems that in the prior art, a sensor body is poor in installation accuracy effect, and liquid leakage is likely to occur at the connecting position of a glass rod. The technical effects are that the installation accuracy of the sensor body is improved, and the problem of liquid leakage of the glass rod can be effectively avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of color sensors, and in particular to a color sensor. Background Art

[0002] With the advancement of science and technology, color sensors are playing an increasingly important role in various applications. As a core electronic device that converts the color information of an object into an electrical signal, the application of color sensors has extended from industrial automation, consumer electronics and other fields to precision physical and chemical analysis scenarios such as environmental monitoring and food testing. The color sensor has a built-in light source to illuminate the target object, uses a photodiode array to capture the reflection spectrum, and uses RGB ratio analysis or color scale mode algorithms to achieve digital analysis of color values. This feature effectively solves the pain point of relying on human eye interpretation in traditional manual titration experiments.

[0003] RGB ratio analysis determines the color of an object by detecting the intensity of red light (R), green light (G), and blue light (B) reflected or transmitted by the object through a color sensor. The sensor converts the detected light signal into an electrical signal, and the sensor directly gives the corresponding color value based on the electrical signal, such as transmitting data through communication interfaces such as I2C and SPI.

[0004] However, most of the current color sensors have poor accuracy in installing the sensor body, which makes it impossible to align the sensor body and the LED lamp beads on both sides of the prefabricated groove, which can easily affect the accuracy of the sensor body detection. In addition, the glass rod is mostly a structure of a stainless steel head and a glass lens. The joint between the glass lens and the stainless steel needs to be connected by bonding, which makes it easy for liquid leakage to occur at the joint, thus affecting the use of the color sensor. Summary of the invention

[0005] To this end, the present invention provides a color sensor to solve the existing problems of poor installation accuracy of the sensor body and easy liquid leakage at the glass rod connection.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A color sensor comprises a glass rod, a stainless steel sheet and an FPC, wherein a sealing cover is connected to the outer side of the upper end of the glass rod, a prefabricated groove is provided at the lower end of the glass rod, a first PCB mainboard is installed inside the glass rod, and an LED lamp bead is electrically connected to the outer side of the lower end of the first PCB mainboard;

[0008] A stainless steel sheet is installed on the outer surface of the lower end of the first PCB main board, and an extension sheet is fixedly installed on the outer side of the rear end of the stainless steel sheet;

[0009] An FPC located outside the first PCB main board is installed on the outer side of the lower end of the stainless steel sheet, and the outer side of the FPC is connected to the sensor body.

[0010] Furthermore, a retaining ring is installed on the outer side of the upper end of the first PCB main board, and an O-ring is arranged on the outer side of the upper end of the retaining ring.

[0011] Furthermore, the outer side of the upper end of the O-ring is connected to the second PCB main board, and the retaining ring, the O-ring and the interior of the second PCB main board are all penetrated by a through groove that is compatible with the upper end of the first PCB main board.

[0012] Furthermore, a lamp sleeve is installed on the outer side of the LED lamp bead, and the LED lamp bead is located directly above the sensor body.

[0013] Furthermore, the sensor body is connected to the first PCB mainboard by wires, and the LED lamp beads and the sensor body are respectively located in the middle of the upper and lower sides of the prefabricated groove.

[0014] Furthermore, prefabricated through grooves are evenly spaced on the lower side of the first PCB main board, and the size of the prefabricated through grooves is matched with the size of the extension piece.

[0015] Furthermore, the rear end of the extension piece extends through the prefabricated through groove to the rear end outside of the first PCB main board, and the lower end of the first PCB main board extends to the left side of the prefabricated groove.

[0016] Furthermore, the extension sheet is connected to the first PCB main board by a snap-fitting manner through a prefabricated through groove, and the lower end of the first PCB main board extends to the upper bottom side of the stainless steel sheet.

[0017] Furthermore, the longitudinal section of the stainless steel sheet is "L" shaped.

[0018] Furthermore, a connecting inner tube is installed at the connection gap between the glass rod and the first PCB mainboard, and the length of the connecting inner tube is smaller than the length of the glass rod.

[0019] Compared with the prior art, the present invention has the following advantages:

[0020] 1. The glass rod is made of glass raw materials melted and blown, and the integrated seamless structure is designed to achieve full sealing performance. The main body does not have any mechanical splicing interface, and only retains a threaded interface at the top for threaded installation of the sealing cover, which can effectively avoid liquid leakage from the glass rod and avoid affecting the overall use;

[0021] 2. The extension piece extends from the lower end of the first PCB main board to the upper bottom side of the stainless steel sheet. The extension piece is connected to the first PCB main board by a snap-fitting manner through a prefabricated through-slot. The extension piece plays a good installation role on the stainless steel sheet through the prefabricated through-slot, and is convenient for fixing the stainless steel sheet on the outer side of the lower end of the first PCB main board. At the same time, the right end of the stainless steel sheet can extend to the bottom of the prefabricated groove under the action of the first PCB main board. The FPC can install the sensor body on the right end of the stainless steel sheet, so that the sensor body can be located below the prefabricated groove under the action of the stainless steel sheet, thereby improving the installation effect of the sensor body, so that the sensor body and the LED lamp beads can be installed on both sides of the prefabricated groove in a relatively aligned manner, thereby improving the accuracy of the sensor body detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more intuitively illustrate the prior art and the present application, exemplary drawings are given below. It should be understood that the specific shapes and structures shown in the drawings should not generally be regarded as limiting conditions for implementing the present application; for example, those skilled in the art are capable of easily making conventional adjustments or further optimizations to the addition / reduction / attribution division, specific shapes, positional relationships, connection methods, and dimensional ratios of certain units based on the technical concepts and exemplary drawings disclosed in the present application.

[0023] Figure 1 A schematic diagram of the overall exploded structure of a color sensor provided in some embodiments of the present invention.

[0024] Figure 2 A schematic diagram of the overall structure of a color sensor provided in some embodiments of the present invention.

[0025] Figure 3 A schematic diagram of the overall structure of the connection between a first PCB mainboard and a retaining ring of a color sensor provided in some embodiments of the present invention.

[0026] Figure 4 A schematic diagram of the overall structure of the connection between a first PCB main board and an extension piece of a color sensor provided in some embodiments of the present invention.

[0027] Figure 5 A front view structural diagram of the connection between a stainless steel sheet and an FPC of a color sensor provided in some embodiments of the present invention.

[0028] Figure 6 A color sensor provided by some embodiments of the present invention Figure 3 Enlarged structural diagram at A in the middle.

[0029] Description of reference numerals:

[0030] 1. Glass rod; 2. Connecting inner tube; 3. Sealing cover; 4. Prefabricated groove; 5. First PCB main board; 6. LED lamp beads; 7. Lamp sleeve; 8. Prefabricated through groove; 9. Stainless steel sheet; 10. Extension sheet; 11. FPC; 12. Sensor body; 13. Retaining ring; 14. O-ring; 15. Second PCB main board. DETAILED DESCRIPTION

[0031] The present application is further described below in detail through specific embodiments in conjunction with the accompanying drawings.

[0032] like Figures 1 to 6 As shown, a color sensor in an embodiment of the present invention includes a glass rod 1, a stainless steel sheet 9 and an FPC 11. A sealing cover 3 is connected to the outer side of the upper end of the glass rod 1, a prefabricated groove 4 is opened at the lower end of the glass rod 1, and a first PCB mainboard 5 is installed inside the inner tube 2.

[0033] The glass rod 1 is made of glass raw materials melted and blown, and its integrated seamless structure is designed to achieve full sealing performance. Its main body does not have any mechanical splicing interface, and only retains a threaded interface at the top for threaded installation of the sealing cover 3, thereby effectively avoiding the problem of liquid leakage in the glass rod 1 and avoiding affecting the overall use effect. The first PCB main board 5 is responsible for processing the signal collected by the sensor body 12 to extract useful color information in the solution to be tested.

[0034] At the same time, a connecting inner tube 2 is installed at the connection gap between the glass rod 1 and the first PCB main board 5, and the length of the connecting inner tube 2 is smaller than the length of the glass rod 1. The connecting inner tube 2 is used to compensate for the gap between the first PCB main board 5 and the glass rod 1, improve the installation effect of the first PCB main board 5, and facilitate the installation of the LED lamp bead 6 inside the glass rod 1 through the first PCB main board 5, so that the LED lamp bead 6 is located above the prefabricated groove 4.

[0035] A stainless steel sheet 9 is installed on the outer surface of the lower end of the first PCB main board 5, and an extension sheet 10 is fixedly installed on the outer side of the rear end of the stainless steel sheet 9. Prefabricated through grooves 8 are evenly spaced on the lower side of the first PCB main board 5, and the size of the prefabricated through grooves 8 is adapted to the size of the extension sheet 10.

[0036] Among them, the lower end of the first PCB main board 5 extends to the upper side of the bottom of the stainless steel sheet 9, and the extension sheet 10 is connected to the first PCB main board 5 by a snap-fitting manner through the prefabricated through groove 8. The extension sheet 10 plays a good installation role on the stainless steel sheet 9 through the prefabricated through groove 8, which is convenient for fixing the stainless steel sheet 9 on the outer side of the lower end of the first PCB main board 5, and at the same time, the upper side of the lower end of the stainless steel sheet 9 is in contact with the lower end of the first PCB main board 5. The stainless steel sheet 9 is precisely designed and can be sent to the bottom of the glass rod 1 by rotating a specific angle and cooperating with the first PCB main board 5, so as to facilitate the subsequent installation of the sensor body 12.

[0037] At the same time, the rear end of the extension piece 10 extends through the prefabricated through groove 8 to the rear end outside of the first PCB main board 5. After the extension piece 10 is fully inserted into the prefabricated through groove 8, the extended extension piece 10 can be turned inward so that the rear end of the extension piece 10 is folded to the rear surface of the first PCB main board 5, thereby further improving the stability of the installation of the stainless steel sheet 9.

[0038] The FPC 11 located outside the first PCB main board 5 is installed on the outer side of the lower end of the stainless steel sheet 9, and the outer side of the FPC 11 is connected to the sensor body 12. The longitudinal section of the stainless steel sheet 9 is "L" shaped. The lower end of the first PCB main board 5 extends to the left side of the prefabricated groove 4.

[0039] Among them, the stainless steel sheet 9 is installed at the bottom lower end of the first PCB main board 5, and the right end of the stainless steel sheet 9 can extend to the bottom of the prefabricated groove 4 under the action of the first PCB main board 5. At this time, the FPC 11 can install the sensor body 12 on the right end of the stainless steel sheet 9, so that the sensor body 12 can be located below the prefabricated groove 4 under the action of the stainless steel sheet 9, thereby improving the installation effect of the sensor body 12.

[0040] At the same time, the outer side of the lower end of the first PCB main board 5 is electrically connected to the LED lamp bead 6, the outer side of the LED lamp bead 6 is installed with a lamp sleeve 7, and the LED lamp bead 6 is located directly above the sensor body 12, the sensor body 12 is connected to the first PCB main board 5 by wires, and the LED lamp bead 6 and the sensor body 12 are respectively located in the middle of the upper and lower sides of the prefabricated groove 4, the LED lamp bead 6 is a light source and the brightness can be adjusted under the control of the first PCB main board 5, the lamp sleeve 7 can collect and focus light, so that the light is more concentratedly irradiated to the area around the sensor body 12, which is convenient for improving the utilization rate of light, so that the area around the sensor body 12 can obtain sufficient light intensity.

[0041] During detection, the light emitted by the LED lamp bead 6 can be collected by the sensor body 12 through the transparent glass rod 1 and the solution to be tested in the prefabricated groove 4, and the light absorbed in the solution to be tested passes through the glass rod 1 under the prefabricated groove 4 and is collected by the sensor body 12. The analog signal that can be collected by the sensor body 12 is converted into a digital signal through the first PCB main board 5 and then sent to the control system for processing through the second PCB main board 15 to complete color recognition.

[0042] A retaining ring 13 is installed on the outer side of the upper end of the first PCB main board 5, and an O-ring 14 is arranged on the outer side of the upper end of the retaining ring 13. The outer side of the upper end of the O-ring 14 is connected to the second PCB main board 15, and the retaining ring 13, the O-ring 14 and the second PCB main board 15 are all penetrated by a through groove adapted to the upper end of the first PCB main board 5.

[0043] The retaining ring 13 and the O-ring 14 play a role in improving the installation effect, and the second PCB main board 15 is electrically connected to the first PCB main board 5 to assist the first PCB main board 5 in signal collection and achieve collaborative work. The second PCB main board 15 is small in size and circular, so as to optimize the overall layout and space utilization.

[0044] How it works

[0045] First, the stainless steel sheet 9 is fixedly installed on the lower outer side of the first PCB main board 5 through the extension sheet 10 and the prefabricated through groove 8, and then the sensor body 12 is fixedly installed on the right end of the stainless steel sheet 9 through the FPC 11, and then the retaining ring 13, the O-ring 14 and the second PCB main board 15 are assembled with the upper outer side of the first PCB main board 5 in sequence. At this time, the lower end of the first PCB main board 5 and the stainless steel sheet 9 are extended into the interior of the glass rod 1, and the lower end of the stainless steel sheet 9 is sent to the bottom of the glass rod 1 after rotating a specific angle, so that the sensor body 12 is located below the prefabricated groove 4. At the same time, the LED lamp bead 6 is installed above the prefabricated groove 4 under the action of the first PCB main board 5, so that the LED lamp bead 6 is located directly above the sensor body 12. Then the connecting inner tube 2 is inserted into the interior of the glass rod 1, and the sealing cover 3 is rotated and installed on the upper outer side of the glass rod 1 to seal the glass rod 1, and the assembly is completed.

[0046] When the solution to be tested needs to be tested by RGB color method, the glass rod 1 is extended into the solution to be tested so that the liquid level of the solution to be tested exceeds the uppermost end of the prefabricated groove 4, and then the LED lamp bead 6 is started. The light emitted by the LED lamp bead 6 can pass through the transparent glass rod 1 and the solution to be tested in the prefabricated groove 4 to irradiate the area around the sensor body 12 under the action of the lamp sleeve 7. At this time, the light absorbed in the solution to be tested passes through the glass rod 1 under the prefabricated groove 4 and is collected by the sensor body 12. The analog signal that can be collected by the sensor body 12 is converted into a digital signal through the first PCB main board 5 and then sent to the control system through the second PCB main board 15 for processing and calculation according to the model. When the color of the liquid changes, the data received by the sensor body 12 will also change accordingly. When the calculation result is consistent with the standard result, it can be considered that the color titration end point has been reached.

[0047] The control method of the present invention is automatic control through a controller. The control circuit of the controller can be realized by simple programming by technicians in this field, which belongs to common knowledge in this field, so the present invention will not explain the control method and circuit connection in detail.

[0048] The technical features of the above embodiments may be arbitrarily combined (as long as there is no contradiction in the combination of these technical features). To make the description concise, not all possible combinations of the technical features in the above embodiments are described; these embodiments that are not explicitly written should also be considered to be within the scope of this specification.

Claims

1. A color sensor, comprising a glass rod (1), a stainless steel sheet (9) and an FPC (11), characterized in that: The outer side of the upper end of the glass rod (1) is connected to a sealing cover (3); the lower end of the glass rod (1) is provided with a prefabricated groove (4); a first PCB mainboard (5) is installed inside the glass rod (1); and the outer side of the lower end of the first PCB mainboard (5) is electrically connected to an LED lamp bead (6); A stainless steel sheet (9) is installed on the outer surface of the lower end of the first PCB main board (5), and an extension sheet (10) is fixedly installed on the outer side of the rear end of the stainless steel sheet (9); An FPC (11) located outside the first PCB main board (5) is installed on the outer side of the lower end of the stainless steel sheet (9), and a sensor body (12) is connected to the outer side of the FPC (11).

2. A color sensor according to claim 1, characterized in that: A retaining ring (13) is installed on the outer side of the upper end of the first PCB main board (5), and an O-ring (14) is arranged on the outer side of the upper end of the retaining ring (13).

3. A color sensor according to claim 2, characterized in that: The outer side of the upper end of the O-ring (14) is connected to the second PCB main board (15), and the interiors of the retaining ring (13), the O-ring (14) and the second PCB main board (15) are all penetrated by a through groove that is compatible with the upper end of the first PCB main board (5).

4. A color sensor according to claim 1, characterized in that: A lamp sleeve (7) is installed on the outer side of the LED lamp bead (6), and the LED lamp bead (6) is located directly above the sensor body (12).

5. A color sensor according to claim 1, characterized in that: The sensor body (12) is connected to the first PCB main board (5) by wires, and the LED lamp bead (6) and the sensor body (12) are respectively located in the middle of the upper and lower sides of the prefabricated groove (4).

6. A color sensor according to claim 1, characterized in that: Prefabricated through grooves (8) are evenly spaced on the lower side of the first PCB main board (5), and the size of the prefabricated through grooves (8) is compatible with the size of the extension piece (10).

7. A color sensor according to claim 6, characterized in that: The rear end of the extension piece (10) extends through the prefabricated through slot (8) to the rear end outside of the first PCB main board (5), and the lower end of the first PCB main board (5) extends to the left side of the prefabricated groove (4).

8. A color sensor according to claim 7, characterized in that: The extension sheet (10) is connected to the first PCB main board (5) by means of a snap fit via a prefabricated through groove (8), and the lower end of the first PCB main board (5) extends to the upper bottom side of the stainless steel sheet (9).

9. A color sensor according to claim 8, characterized in that: The longitudinal section of the stainless steel sheet (9) is in an "L" shape.

10. A color sensor according to claim 1, characterized in that: A connecting inner tube (2) is installed at the connection gap between the glass rod (1) and the first PCB main board (5), and the length of the connecting inner tube (2) is smaller than the length of the glass rod (1).

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