Glue spraying detection device

Abstract

The invention discloses a glue spraying detection device which comprises a first infrared light source, a second infrared light source, a visible light source, a first reflecting mirror, a second reflecting mirror, a focusing lens and an infrared sensor. The glue has a second absorptivity for second infrared light emitted by the second infrared light source, and the first infrared light source, the first reflector, the second reflector, the light-transmitting pore plate and the focusing lens are sequentially arranged from top to bottom along a vertical light path; the second infrared light source and the visible light source are arranged on one side of the vertical light path, second infrared light emitted by the second infrared light source is reflected by the first reflector and then coincides with the vertical light path, and the infrared sensor is used for receiving light rays reflected by the first infrared light and the second infrared light irradiated to the to-be-detected product. Light reflected after passing through glue is received through the infrared sensor so as to detect the glue on the to-be-detected product, the pasting quality of the product is guaranteed, and the user experience is guaranteed.

Description

Technical Field

[0001] The invention relates to the field of glue spraying detection, and in particular to a glue spraying detection device. Background Art

[0002] In the production process, glue is often needed for pasting, for example, a color box is formed by spraying glue at a preset position of the box. However, in the prior art, during the glue spraying process, there is no detection of whether the glue coating position is correct. Usually, it is only when the color box bursts that it is discovered that the glue is not sprayed well. Therefore, if the poor glue spraying is not discovered in time, large-area bonding quality problems may occur. Even if it is discovered before shipment, a large amount of manpower is required to check, which is time-consuming and labor-intensive, affecting production efficiency and seriously affecting user experience. Summary of the invention

[0003] The purpose of the present invention is to provide a glue spraying detection device to solve the problem in the prior art that the glue is not detected and the production efficiency is seriously affected.

[0004] In order to achieve the above-mentioned object, the present invention provides a glue spraying detection device, which is used to detect glue on a product to be tested, and includes a first infrared light source, a second infrared light source, a visible light source, a first reflector, a second reflector, a light-transmitting hole plate, a focusing lens and an infrared sensor, wherein the glue has a first absorption rate for the first infrared light emitted by the first infrared light source, and the glue has a second absorption rate for the second infrared light emitted by the second infrared light source, and the first absorption rate is different from the second absorption rate, and the first infrared light source, the first reflector, the second reflector, the light-transmitting hole plate, and the focusing lens are arranged in sequence from top to bottom along a vertical optical path; the second infrared light source and the visible light source are arranged on one side of the vertical optical path, the second infrared light emitted by the second infrared light source coincides with the vertical optical path after being reflected by the first reflector, and the visible light emitted by the visible light source coincides with the vertical optical path after being reflected by the second reflector, and the focusing lens is used to focus the light emitted by the first infrared light source, the second infrared light source and the visible light source on the product to be tested, and the infrared sensor is used to receive the light reflected by the first infrared light and the second infrared light irradiated on the product to be tested to form an optical signal for detecting glue.

[0005] Preferably, a first filter and a first focusing element are sequentially arranged on the reflected light paths of the first infrared light and the second infrared light reflected to the infrared sensor.

[0006] Preferably, the first filter, the first focusing element and the infrared sensor form a receiving component, and the receiving component is divided into two groups, and the two groups of receiving components are symmetrically arranged on both sides of the vertical light path.

[0007] Preferably, a glass filter is further provided below the focusing lens, and the reflected light path of the first infrared light and the second infrared light reflected to the infrared sensor and the vertical light path both pass through the glass filter.

[0008] Preferably, a side of the first reflector away from the second reflector is coated with a reflective film.

[0009] Preferably, the light-transmitting hole plate is provided with a light-transmitting hole, the light-transmitting hole is a circular hole or a strip-shaped hole, and the size of the light-transmitting hole is determined according to the maximum energy per square millimeter irradiated onto the product to be tested.

[0010] Preferably, the second infrared light source and the visible light source are both mounted on a mounting plate.

[0011] Preferably, the first infrared light source is a first infrared LED chip, the second infrared light source is a second infrared LED chip, and the visible light source is a red LED chip.

[0012] Preferably, it comprises a circuit board, on which a processing module is arranged, and the processing module is electrically connected to the infrared sensor.

[0013] Preferably, it includes a shell and a mounting block arranged in the shell, and the mounting block is provided with the first infrared light source, the second infrared light source, the visible light source, the first reflector, the second reflector, the light-transmitting hole plate, the focusing lens and the infrared sensor.

[0014] Compared with the prior art, the present invention designs a first infrared light source, a second infrared light source, a visible light source, a first reflector, a second reflector, a light-transmitting hole plate and a focusing lens, and reflects the light emitted by the second infrared light source and the visible light source through the first reflector and the second reflector respectively to converge and overlap with the light emitted by the first infrared light source, and receives the light reflected after passing through the glue through an infrared sensor to detect the glue on the product to be tested, thereby ensuring the product's pasting quality and the user's experience, and the structure is compact and the design is ingenious. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of the glue spraying detection device according to an embodiment of the present invention.

[0016] Figure 2 This is a detection principle diagram of the glue spraying detection device according to an embodiment of the present invention.

[0017] Figure 3 This is an exploded view of the glue spraying detection device according to an embodiment of the present invention.

[0018] Figure 4Another exploded view of the glue spraying detection device according to an embodiment of the present invention.

[0019] Figure 5 This is a driving principle diagram of a circuit board of a glue spraying detection device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0020] In order to explain the technical content, structural features and achieved effects of the present invention in detail, the following is a detailed description in conjunction with the implementation methods and the accompanying drawings.

[0021] like Figures 1 to 5As shown, an embodiment of the present invention provides a glue spraying detection device 10, which is used to detect glue 201 on a product to be tested 20, including a first infrared light source 1, a second infrared light source 2, a visible light source 3, a first reflector 4, a second reflector 5, a light-transmitting hole plate 6, a focusing lens 7 and an infrared sensor 12. The glue 201 has a first absorption rate for the first infrared light emitted by the first infrared light source 1, and the glue 201 has a second absorption rate for the second infrared light emitted by the second infrared light source 2. The first absorption rate is different from the second absorption rate. The first infrared light source 1, the first reflector 4, the second reflector 5, the light-transmitting hole plate 6, the focusing lens 7 and the infrared sensor 12 are provided. The mirrors 7 are arranged in sequence from top to bottom along the vertical optical path; the second infrared light source 2 and the visible light source 3 are arranged on one side of the vertical optical path, the second infrared light emitted by the second infrared light source 2 coincides with the vertical optical path after being reflected by the first reflector 4, and the visible light emitted by the visible light source 3 coincides with the vertical optical path after being reflected by the second reflector 5, the focusing lens 7 is used to focus the light emitted by the first infrared light source 1, the second infrared light source 2 and the visible light source 3 on the product to be tested 20, and the infrared sensor 12 is used to receive the first infrared light and the second infrared light irradiated to the product to be tested 20. The reflected light forms an optical signal for detecting the glue 201. Specifically, the product 20 to be tested is, for example, a paper box sprayed with glue 201, and the infrared sensor 12 can be specifically a photosensitive sensor. The first infrared light source 1 and the second infrared light source 2 have different sensitivities to the glue 201. Preferably, the first infrared light source 1 is sensitive to the glue 201, and the second infrared light source 2 is not sensitive to the glue 201, that is, the first absorption rate of the glue 201 to the first infrared light is greater than the second absorption rate of the glue 201 to the second infrared light, so that after passing through the glue 201, the first infrared light reflects less light and the second infrared light reflects more light. The infrared sensor 12 receives the first infrared light passing through the glue 201. The light reflected after and the light reflected after the second infrared light pass through the glue 201 form a first light intensity signal and a second light intensity signal respectively. The first light intensity signal can be used to identify whether there is glue 201 on the product to be tested 20 and the thickness of the glue 201 and other information. The second light intensity signal can be used to identify the position of the glue 201 on the object to be tested and other information. The visible light source 3 emits visible light. Since the first infrared light and the second infrared light are both invisible light, in order to facilitate the calibration and positioning of the glue spraying detection device 10 during installation and other processes, the visible light is irradiated onto the product to be tested 20 for easy confirmation by the human eye. The design is very clever.

[0022] The embodiment of the present invention designs a first infrared light source 1, a second infrared light source 2, a visible light source 3, a first reflector 4, a second reflector 5, a light-transmitting hole plate 6 and a focusing lens 7, and reflects the light emitted by the second infrared light source 2 and the visible light source 3 through the first reflector 4 and the second reflector 5 respectively to converge and overlap with the light emitted by the first infrared light source, and receives the light reflected after passing through the glue 201 through the infrared sensor 12 to detect the glue 201 on the product to be tested 20, thereby ensuring the pasting quality of the product, improving production efficiency, and ensuring user experience, and the structure is compact and the design is ingenious.

[0023] In the embodiment of the present invention, a first filter 9 and a first focusing element 11 are sequentially arranged on the reflection light path of the first infrared light and the second infrared light reflected to the infrared sensor 12. Specifically, Figures 2 to 4 As shown, in order to prevent interference from external ambient light and light emitted by the visible light source 3, a first filter 9 is used to allow the first infrared light and the second infrared light of a specific wavelength to pass through, and the light is focused by the first focusing member 11. The first focusing member 11 can be a focusing lens, or a glass ball can be directly used. The cost of the glass ball is lower. The material of the first filter 9 can be a non-metallic acrylic material.

[0024] In the embodiment of the present invention, the first filter 9, the first focusing element 11 and the infrared sensor 12 form a receiving assembly, and the receiving assembly is divided into two groups, and the two groups of receiving assemblies are symmetrically arranged on both sides of the vertical light path. Figures 2 to 4 As shown, the infrared sensor 12 is arranged on the side of the vertical optical path. Through the arrangement of two groups of receiving components, the two infrared sensors 12 work at the same time, so that the optical signals detected by the two groups of infrared sensors 12 can be compared and analyzed to ensure the reliable operation of the glue spraying detection device 10. In addition, even if one of the receiving components fails, the other receiving component can also ensure the operation of the glue spraying detection device 10. At the same time, the two groups of receiving components are symmetrically arranged, which can effectively eliminate the detection error caused by slight jitter. Moreover, for the case where the product 20 to be tested is dark paper, that is, light-absorbing paper, if a single group of receiving components is used for receiving, there will be reception uncertainty. The two groups of receiving components arranged symmetrically are conducive to improving the judgment accuracy. It should be noted that the receiving components in the embodiment of the present invention can be only one group, and the group of receiving components is arranged on one side of the vertical optical path, which can also realize the detection of the glue 201 on the product 20 to be tested.

[0025] In the embodiment of the present invention, Figures 2 to 4 As shown, a glass filter 8 is also provided below the focusing lens 7, and the reflected light path and the vertical light path of the first infrared light and the second infrared light reflected to the infrared sensor 12 both pass through the glass filter 8. Specifically, the vertical light path and the reflected light path are as follows: Figure 2As shown by the middle arrow, in order to prevent interference from external ambient light, a glass filter 8 is arranged under the focusing lens 7 and the receiving component. The glass filter 8 only allows the first infrared light, the second infrared light and the visible light to pass through, avoiding interference from ambient light and ensuring the accuracy of detection by the glue spraying detection device 10. Of course, the filtering parameters of the glass filter 8 can be selected and set according to actual needs.

[0026] In the embodiment of the present invention, a reflective film is coated on the side of the first reflector 4 away from the second reflector 5. Specifically, by setting the reflective film, the second infrared light is prevented from being transmitted upward through the second reflector 5, and the intensity of the second infrared light is effectively guaranteed. The reflective film can be a selective reflective film that can reflect the second infrared light but does not affect the passage of the first infrared light.

[0027] In the embodiment of the present invention, Figure 3 to Figure 4 As shown, the light-transmitting hole plate 6 is provided with a light-transmitting hole 61, which is a circular hole or a strip hole, and the size of the light-transmitting hole 61 is determined according to the maximum energy per square millimeter irradiated onto the product to be tested 20. Specifically, the material of the light-transmitting hole plate 6 can be opaque black plug steel, and the first infrared light, the second infrared light and the visible light are transmitted through the light-transmitting hole 61. The setting of the light-transmitting hole plate 6 ensures that the light spot of the light passing through the light-transmitting hole 61 is as small as possible and the energy is large enough, which is a clever design.

[0028] In the embodiment of the present invention, Figures 2 to 4 As shown, the second infrared light source 2 and the visible light source 3 are both mounted on the mounting plate 103. Specifically, the second infrared light source 2 and the visible light source 3 are mounted on the same mounting plate 103, which is convenient for installation and effectively ensures the installation accuracy of the second infrared light source 2 and the visible light source 3, and the design is very clever.

[0029] In the embodiment of the present invention, the first infrared light source 1 is a first infrared LED chip, the second infrared light source 2 is a second infrared LED chip, and the visible light source 3 is a red LED chip. Specifically, the first infrared LED chip, the second infrared LED chip, and the red LED chip have long life and are relatively small in size, so that the overall size of the glue spraying detection device 10 is small and the reliability is good. In addition, the visible light source 3 is a red LED chip, which is convenient for human eyes to recognize and calibrate.

[0030] In the embodiment of the present invention, the glue spraying detection device 10 includes a circuit board 104, on which a processing module is disposed, and the processing module is electrically connected to the infrared sensor 12. Specifically, the processing module is an FGPA processing module. The driving principle diagram of the circuit board 104 of the glue spraying detection device 10 is as follows: Figure 5As shown, the circuit board 104 is provided with multiple DC power supplies, FGPA processing modules, IO input and output modules, RS232 communication modules, storage modules, ADC modules, operational amplifier modules, light source control modules and analog switches. The multiple DC power supplies include DC24V, DC5V, DC3.3V and DC1.2V for powering each module on the circuit board 104. The light control module is used to control the opening and closing of the first infrared light source 1, the second infrared light source 2 and the visible light source 3. The two infrared sensors 12 amplify the sensed light signals through the operational amplifier module and transmit them to the FGPA processing module after digital-to-analog conversion by the ADC module for analysis and processing, and output the processed information.

[0031] In the embodiment of the present invention, Figure 1 as well as Figure 3 to Figure 4 As shown, the glue spraying detection device 10 includes a shell 101 and a mounting block 102 arranged in the shell 101, and the mounting block 102 is provided with a first infrared light source 1, a second infrared light source 2, a visible light source 3, a first reflector 4, a second reflector 5, a light-transmitting hole plate 6, a focusing lens 7 and an infrared sensor 12. Specifically, the shell 101 includes a cover shell 1011 and a cover plate 1012 covering the cover shell 1011. The cover shell 1011 has a accommodating cavity. The mounting block 102 and the circuit board 104 are stacked in the accommodating cavity. Through holes are opened on the mounting block 102 corresponding to the vertical light path and the reflected light path. At the same time, the first infrared light source 1, the second infrared light source 2, the visible light source 3, the first reflector 4, the second reflector 5, the light-transmitting hole plate 6, the focusing lens 7, the infrared sensor 12 and other components are installed on the mounting block 102. An installation port 106 is opened at the lower part of the cover shell 1011, and a glass filter 8 is embedded in the installation port 106 to form a light outlet. In addition, a connection interface 105 is also provided on the shell 101, and the connection interface 105 is used to install the glue spraying detection device 10 on the required equipment.

[0032] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the scope of the patent application of the present invention still fall within the scope covered by the present invention.

Claims

1. A glue spraying detection device, used to detect glue on a product to be tested, characterized in that: The device comprises a first infrared light source, a second infrared light source, a visible light source, a first reflector, a second reflector, a light-transmitting hole plate, a focusing lens and an infrared sensor, wherein the glue has a first absorption rate for the first infrared light emitted by the first infrared light source, the glue has a second absorption rate for the second infrared light emitted by the second infrared light source, the first absorption rate is different from the second absorption rate, and the first infrared light source, the first reflector, the second reflector, the light-transmitting hole plate and the focusing lens are sequentially arranged from top to bottom along a vertical optical path; The second infrared light source and the visible light source are arranged on one side of the vertical optical path, the second infrared light emitted by the second infrared light source coincides with the vertical optical path after being reflected by the first reflector, and the visible light emitted by the visible light source coincides with the vertical optical path after being reflected by the second reflector, the focusing lens is used to focus the light emitted by the first infrared light source, the second infrared light source and the visible light source on the product to be tested, and the infrared sensor is used to receive the light reflected by the first infrared light and the second infrared light irradiated on the product to be tested to form an optical signal for detecting glue.

2. The glue spraying detection device according to claim 1, characterized in that: A first filter and a first focusing element are sequentially arranged on the reflected light paths of the first infrared light and the second infrared light reflected to the infrared sensor.

3. The glue spraying detection device according to claim 2, characterized in that: The first filter, the first focusing element and the infrared sensor form a receiving component. The receiving component is divided into two groups. The two groups of receiving components are symmetrically arranged on both sides of the vertical light path.

4. The glue spraying detection device according to claim 1, characterized in that: A glass filter is also provided below the focusing lens, and the reflected light path of the first infrared light and the second infrared light reflected to the infrared sensor and the vertical light path both pass through the glass filter.

5. The glue spraying detection device according to claim 1, characterized in that: A side of the first reflector away from the second reflector is coated with a reflective film.

6. The glue spraying detection device according to claim 1, characterized in that: The light-transmitting hole plate is provided with a light-transmitting hole, the light-transmitting hole is a circular hole or a strip-shaped hole, and the size of the light-transmitting hole is determined according to the maximum energy per square millimeter irradiated onto the product to be tested.

7. The glue spraying detection device according to claim 1, characterized in that: The second infrared light source and the visible light source are both mounted on a mounting plate.

8. The glue spraying detection device according to claim 1, characterized in that: The first infrared light source is a first infrared LED chip, the second infrared light source is a second infrared LED chip, and the visible light source is a red LED chip.

9. The glue spraying detection device according to claim 1, characterized in that: It comprises a circuit board, on which a processing module is arranged, and the processing module is electrically connected to the infrared sensor.

10. The glue spraying detection device according to claim 9, characterized in that: It comprises a shell and a mounting block arranged in the shell, wherein the first infrared light source, the second infrared light source, the visible light source, the first reflector, the second reflector, the light-transmitting hole plate, the focusing lens and the infrared sensor are arranged on the mounting block.

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