A device for detecting the number of black spots of a PFA product

Abstract

This invention provides a device for detecting the number of black spots in PFA products. In the prior art, CCD-based detection equipment is mostly designed for transparent films, and its adaptability to black spot identification in semi-transparent PFA materials is insufficient. Therefore, in order to more comprehensively detect black spots in PFA products, this device includes a detection platform with a conveyor belt. A bridge is installed in the middle of the conveyor belt, and a trapezoidal channel is provided inside the bridge. Array light sources are installed on both sides of the trapezoidal channel. A filter is mounted in front of the array light sources via a mounting bracket. An image acquisition device is installed at the top of the trapezoidal channel, and a push rod motor is connected above the image acquisition device. A laser rangefinder is installed on the side of the image acquisition device. This invention, by tilting and crisscrossing the array light sources, fully utilizes ultraviolet light to excite the background fluorescence of PFA and red light to highlight carbonized black spots, effectively improving the detection accuracy and speed of black spots in PFA products.

Description

Technical Field

[0001] This utility model belongs to the field of detection technology and relates to a device for detecting the number of black spots in PFA products. Background Technology

[0002] PFA products may develop black spots and impurities during production due to raw material contamination or high-temperature sintering. Traditional manual visual inspection is inefficient and prone to missing these impurities. Existing CCD-based inspection equipment is primarily designed for transparent films and is insufficient for identifying black spots in semi-transparent PFA materials. Therefore, designing a black spot quantity detection device for PFA products is essential for more comprehensive black spot detection. Summary of the Invention

[0003] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a device for detecting the number of black spots in PFA products.

[0004] The purpose of this utility model can be achieved through the following technical solution: A device for detecting the number of black spots in PFA products, comprising a detection platform, characterized in that a conveyor belt is installed on the detection platform, a bridge is provided at the middle section of the conveyor belt, a trapezoidal channel is provided inside the bridge, an array of light sources is installed on both sides of the trapezoidal channel, a filter is installed in front of the array of light sources through a mounting bracket, an image acquisition device is installed at the top of the trapezoidal channel, a push rod motor is connected above the image acquisition device, and a laser rangefinder is installed on the side of the image acquisition device.

[0005] The working principle of this utility model is as follows: The PFA product to be tested is conveyed to the bottom of the bridge via a conveyor belt. It is simultaneously illuminated from both sides by an array of light sources at an angle. After the light source is filtered by a filter, cross interference is reduced, making the black spots more obvious. Then, the thickness of the PFA product is detected by a laser rangefinder, and the push rod motor is controlled to adjust the image acquisition device to a suitable height to identify the number of black spots. After the PFA product is tested, it is output to the subsequent classification process via a conveyor belt.

[0006] The array light source is composed of several infrared light source generators and ultraviolet light source generators arranged at 1:1 intervals.

[0007] By adopting the above structure, the detection blind spots caused by uneven illumination can be avoided through mixed arrangement.

[0008] The infrared and ultraviolet light source generators are distributed opposite to each other in the array light sources on both sides of the trapezoidal channel.

[0009] The above structure enhances the contrast of the black dot edges.

[0010] The filters in front of the infrared light source generator and the ultraviolet light source generator in the array light source are each independently mounted on the mounting bracket.

[0011] With the above structure, since the wavelengths of each light source are different, the properties of the filters also need to be somewhat different.

[0012] The surface of the conveyor belt is coated with an antistatic ceramic coating.

[0013] The above structure is used to prevent PFA products from electrostatically sticking together.

[0014] Compared with existing technologies, this PFA product black spot quantity detection device has the following advantages: By setting the array light source at an angle and cross, this utility model makes full use of ultraviolet light to excite the background fluorescence of PFA and red light to highlight carbonized black spots, effectively improving the detection accuracy and speed of black spots in PFA products. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0016] Figure 2 This is a structural schematic diagram of the cable tray part in this utility model.

[0017] Figure 3 This is a schematic diagram of the array light source arrangement structure in this utility model.

[0018] In the diagram, 1 is the testing platform; 2 is the conveyor belt; 3 is the cable tray; 4 is the array light source; 5 is the mounting frame; 6 is the filter; 7 is the image acquisition device; 8 is the push rod motor; 9 is the laser rangefinder; 10 is the infrared light source generator; and 11 is the ultraviolet light source generator. Detailed Implementation

[0019] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0020] like Figure 1-3 As shown, the black spot quantity detection device for this PFA product includes a detection table 1, a conveyor belt 2 installed on the detection table 1, a bridge 3 set at the middle section of the conveyor belt 2, a trapezoidal channel set inside the bridge 3, array light sources 4 installed on both sides of the trapezoidal channel, a filter 6 installed in front of the array light sources 4 through a mounting bracket 5, an image acquisition device 7 installed at the top of the trapezoidal channel, a push rod motor 8 connected above the image acquisition device 7, and a laser rangefinder 9 installed on the side of the image acquisition device 7.

[0021] In this invention, the image acquisition device 7 uses an existing high-resolution industrial camera product + embedded GPU processor, runs a customized image algorithm, and automatically associates the detection results with production batch data to generate SPC quality control charts. At the same time, the image acquisition device 7 is equipped with existing vision sensing components, which can actively monitor the components of PFA products and independently control the push rod motor 8 to adjust the height.

[0022] The array light source 4 is composed of several infrared light source generators 10 and ultraviolet light source generators 11 arranged at 1:1 intervals.

[0023] In this invention, the red light generated by the infrared light source generator 10 is 650nm, and the UV light generated by the ultraviolet light source generator 11 is 400nm.

[0024] In a specific embodiment, the installation angles of the infrared light source generator 10 and the ultraviolet light source generator 11 need to be adjusted. The installation tilt angle of the ultraviolet light source generator 11 is slightly larger, controlled at about 55°, to enhance the fluorescence excitation efficiency. The installation tilt angle of the infrared light source generator 10 is slightly smaller, controlled at about 35°, to improve the capture of scattered light from the black spot surface.

[0025] The infrared light source generator 10 and the ultraviolet light source generator 11 are distributed opposite each other in the array light source 4 on both sides of the trapezoidal channel.

[0026] In the array light source 4, the filters 6 in front of the infrared light source generator 10 and the ultraviolet light source generator 11 are both independently mounted on the mounting bracket 5.

[0027] In this utility model, the filter 6 is selected according to the type of the corresponding light source generating device.

[0028] The surface of conveyor belt 2 is coated with an anti-static ceramic coating.

[0029] The antistatic ceramic coating in this invention is an existing coating material.

[0030] The working principle of this utility model is as follows: The PFA product to be tested is conveyed to the bottom of the bridge 3 via the conveyor belt 2. It is simultaneously irradiated from both sides by the array light source 4 at an angle. After the light source is filtered by the filter 6, the cross interference is reduced, making the black spots more obvious. Then, the thickness of the PFA product is detected by the laser rangefinder 9, and the push rod motor 8 is controlled to adjust the image acquisition device 7 to a suitable height to identify the number of black spots. After the PFA product is tested, it is output to the subsequent classification process via the conveyor belt 2.

[0031] In this invention, the various mechanisms are connected and driven using existing technologies, and synchronous control is achieved through a control panel.

[0032] All of the above components are general standard parts or components known to those skilled in the art. Their structure and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0033] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A device for detecting the number of black spots on PFA products, comprising a detection table (1), characterized in that, The detection platform (1) is equipped with a conveyor belt (2), and a bridge (3) is set at the middle section of the conveyor belt (2). A trapezoidal channel is set inside the bridge (3), and array light sources (4) are installed on both sides of the trapezoidal channel. The array light source (4) is composed of several infrared light source generators (10) and ultraviolet light source generators (11) arranged at a 1:1 interval. The infrared light source generators (10) and ultraviolet light source generators (11) in the array light sources (4) on both sides of the trapezoidal channel are distributed in opposite directions. A filter (6) is installed in front of the array light source (4) through a mounting bracket (5). An image acquisition device (7) is installed at the top of the trapezoidal channel. A push rod motor (8) is connected above the image acquisition device (7). A laser rangefinder (9) is installed on the side of the image acquisition device (7).

2. The device for detecting the number of black spots in a PFA product according to claim 1, characterized in that, The filters (6) in front of the infrared light source generator (10) and the ultraviolet light source generator (11) in the array light source (4) are all independently mounted on the mounting bracket (5).

3. The device for detecting the number of black spots in a PFA product according to claim 1, characterized in that, The surface of the conveyor belt (2) is provided with an antistatic ceramic coating.

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