A hard box breakage defect detection support

Abstract

This utility model discloses a rigid carton damage and defect detection bracket, including a detection head and a mounting base, which are movably connected by an angle adjustment structure. The detection head is located at the top, and its front end has a matrix light source window and a camera aperture for mounting an image acquisition module. The image acquisition module includes a camera component and an array of LED light source components. The array of LED light source components is electrically connected to a light intensity self-adjusting circuit. The mounting base is located at the bottom, and its outer wall has several fixing holes with shock-absorbing structures. This utility model uses an adjustable damage and defect detection bracket to perform real-time image acquisition of carton damage and scratch quality problems. It has a stable structure, a wide image acquisition range, and high image quality.

Description

Technical Field

[0001] This utility model relates to the field of industrial visual inspection, specifically to a rigid strip box damage and defect detection bracket. Background Technology

[0002] Of the existing units in the cigarette factory's packaging workshop, five are carton filling machines used for carton packaging. According to investigation and analysis, the number of times each machine experiences carton breakage or scratches per shift is extremely irregular, further increasing the pressure and difficulty of quality control. This places important demands on the quality control of operators and could easily cause serious negative impacts on the brand.

[0003] Statistics show that in October and November 2024, the cigarette packaging workshop experienced 24 traceability shifts due to occasional damage to carton boxes. Moreover, because the occurrence of carton box damage was extremely irregular, the traceable batches were all the cartons produced in that shift. Due to the low frequency and poor regularity of this quality problem, operators could not observe the condition of the carton box before the lid was closed for a long time. Such quality problems were even more difficult to detect during self-inspection. The appearance inspection of the packing machine and the manual inspection of the packing process could only inspect the side after the transparent paper was wrapped. It was impossible to fully inspect the long side of the front before the carton box was covered. As a result, the traceability time for such quality problems was generally long, which seriously affected the operating efficiency of the equipment and caused a lot of waste of raw and auxiliary materials.

[0004] Therefore, this utility model provides a bracket for detecting defects in rigid strip boxes, which can promptly identify problematic products by acquiring defect images online in real time, thereby ensuring product quality. Utility Model Content

[0005] This utility model provides a rigid carton damage and defect detection bracket. Through the adjustable detection bracket and the image acquisition module installed on it, online real-time image acquisition of rigid carton damage and scratch defects can be performed.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows:

[0007] A rigid strip box damage and defect detection bracket, comprising:

[0008] The detection head and the mounting base are movably connected by an angle adjustment structure.

[0009] The detection head is located at the top, and its front end has a matrix light source window and a camera hole for installing an image acquisition module. The image acquisition module includes an array of LED light source components and a camera component.

[0010] The mounting base is located below, and its outer wall has several fixing holes with shock-absorbing structures.

[0011] As a further improvement, the angle adjustment structure adopts a rotatable adjustable limit hinge.

[0012] As a further improvement: the adjusting limit hinge includes a locking knob I for left and right rotation of the detection head, which is fastened by a threaded structure; a rotating shaft I for adjusting the pitch angle of the detection head; a locking knob II for adjusting the pitch angle of the detection head, which is fastened by a threaded structure; and a rotating shaft II for adjusting the left and right rotation angle of the detection head, through which the lens can be rotated left and right.

[0013] As a further improvement, the array-type LED light source assembly is electrically connected to a light intensity self-adjusting circuit.

[0014] As a further improvement: the self-adjusting light intensity circuit is a brightness adjustment circuit based on a PWM signal, used to adaptively adjust the LED light source intensity according to the ambient light intensity. When the ambient light increases, the LED light source automatically dims; when the ambient light decreases, the LED light source gradually brightens to ensure shooting stability.

[0015] As a further improvement: the brightness adjustment circuit based on the PWM signal includes a photoresistor R1, a PWM signal generator, an LED driver switch, diodes D1 and D2, a capacitor C1, and a fixed resistor R2;

[0016] The photoresistor R1 and the fixed resistor R2 form a voltage divider circuit, and the resistance of the photoresistor R1 decreases when the ambient light increases.

[0017] The PWM signal generator is configured in astable mode, and the duty cycle is adjusted by separating the charging and discharging circuits of diodes D1 and D2 to generate a PWM signal.

[0018] The LED driver switch is controlled by a PWM signal, and the brightness is adjusted by regulating the conduction time.

[0019] As a further improvement: by replacing the fixed resistor R2, the range of brightness variation of the brightness adjustment circuit is increased when its resistance value is reduced.

[0020] As a further improvement: the photoresistor R1 is connected in parallel with a potentiometer to manually set the minimum / maximum brightness threshold.

[0021] As a further improvement, the PWM signal generator is connected in parallel with a 10μF electrolytic capacitor to suppress power supply noise.

[0022] As a further improvement: the fixing hole is a fixing screw hole with a shock-absorbing rubber ring.

[0023] The beneficial effects of this utility model are:

[0024] This invention utilizes an adjustable damage and defect detection bracket, which is installed on the side of the carton filling machine outlet and the carton conveyor belt outlet. It can collect real-time images of carton damage and scratches, enabling timely detection of defective cartons to ensure product quality and prevent defective products from entering the market.

[0025] This invention features a detection bracket that allows for precise detection when a rigid gift box reaches the designated shooting position. The device operates stably, offers a wide image acquisition range, and produces high-quality images. With the aid of an external image processing system, it can significantly improve the workshop's ability to control defects and quality issues related to gift boxes. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the detection bracket structure provided by this utility model;

[0028] Figure 2 A schematic diagram of the brightness adjustment circuit based on PWM signal provided by this utility model. 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] Furthermore, the following description is for illustrative purposes and not for limitation, and sets forth specific details such as particular system structures and techniques to provide a thorough understanding of the embodiments of the present invention. However, those skilled in the art will understand that the present invention can be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods have been omitted to avoid unnecessary detail that could obscure the description of the present invention.

[0031] Reference Figure 1 This utility model is a rigid strip box damage defect detection bracket, including a detection head 1 and a mounting base 2, wherein the detection head 1 and the mounting base 2 are movably connected by an angle adjustment structure.

[0032] The detection head 1 is located at the top, and its front end has a matrix light source window 11 and a camera aperture 12 for mounting an image acquisition module. The image acquisition module includes an array of LED light sources and a camera. The array of LED light sources is electrically connected to a light intensity self-adjusting circuit to adaptively adjust the light intensity of the LED light source according to the ambient light intensity.

[0033] The mounting base 2 is located below, and its outer wall has multiple fixing screw holes with shock-absorbing rubber rings.

[0034] In this embodiment, the angle adjustment structure can adopt an adjustable limiting hinge of existing designs such as those used in photographic gimbals. Specifically, the adjustable limiting hinge 3 achieves bidirectional adjustment through two orthogonal rotation axes, including a locking knob I31 for left and right rotation of the detection head 1, which is fastened by a threaded structure; a rotation axis I32 for adjusting the pitch angle of the detection head 1, which is perpendicular to the mounting surface of the detection head 1 and is nested in the fixed seat of the hinge body through a bearing, allowing the detection head 1 to pitch around a horizontal axis; a locking knob II33 for adjusting the pitch angle of the detection head 1, which is fastened by a threaded structure; and a rotation axis II34 for adjusting the left and right rotation angle of the detection head 1, which allows the detection head 1 to rotate left and right, is parallel to the mounting surface of the detection head 1, and is connected to the movable arm of the hinge body through a bushing.

[0035] In this embodiment, the light intensity self-adjustment circuit is a brightness adjustment circuit based on a PWM signal. (Refer to...) Figure 2 The brightness adjustment circuit based on the PWM signal includes a photoresistor R1 (dark resistance ~100kΩ), a PWM signal generator (model NE555), an LED driver switch (MOSFET-2N7000), diodes D1 and D2, a capacitor C1 (0.1μF), and a fixed resistor R2 (R2=10kΩ).

[0036] The photoresistor R1 and the fixed resistor R2 form a voltage divider circuit. When the ambient light increases, the resistance of the photoresistor R1 decreases.

[0037] The PWM signal generator is configured in astable mode, and the duty cycle is adjusted by separating the charging and discharging circuits of diodes D1 and D2 to generate a PWM signal.

[0038] Charging path: VCC → R1 → D1 → C1 → GND;

[0039] Discharge path: C1 → D2 → R2 → PWM signal generator discharge tube → GND;

[0040] Duty cycle formula: D = R1 / (R1 + R2) × 100%;

[0041] When ambient light increases, R1 decreases → duty cycle D decreases → LED light source brightness decreases;

[0042] The LED driver switch is controlled by a PWM signal, and brightness is adjusted by regulating the conduction time. When the ambient light increases, the LED light source automatically dims; when the ambient light decreases, the LED light source gradually brightens to ensure shooting stability.

[0043] In another embodiment, by replacing the fixed resistor R2 and reducing its resistance, the range of brightness variation of the brightness adjustment circuit can be increased.

[0044] In another embodiment, the minimum / maximum brightness threshold is set by manually calibrating the brightness range by connecting a potentiometer in parallel with the photoresistor R1.

[0045] In another embodiment, power supply noise can be suppressed by connecting a 10μF electrolytic capacitor in parallel between VCC and GND of the PWM signal generator.

[0046] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model, and should all be included within the protection scope of this utility model.

Claims

1. A rigid strip box damage defect detection bracket, characterized in that: include The detection head and the mounting base are movably connected by an angle adjustment structure. The detection head is located at the top, and its front end has a matrix light source window and a camera hole for installing an image acquisition module. The image acquisition module includes an array of LED light source components and a camera component; the array of LED light source components is electrically connected to a light intensity self-adjusting circuit. The mounting base is located below, and its outer wall has several fixing holes with shock-absorbing structures.

2. The rigid strip box damage defect detection bracket according to claim 1, characterized in that: The angle adjustment structure uses a rotatable adjustable limit hinge.

3. The rigid strip box damage defect detection bracket according to claim 2, characterized in that: The adjustable limiting hinge includes a locking knob I for left and right rotation of the detection head, which is fastened by a threaded structure; a rotating shaft I for adjusting the pitch angle of the detection head; a locking knob II for adjusting the pitch angle of the detection head, which is fastened by a threaded structure; and a rotating shaft II for adjusting the left and right rotation angle of the detection head, through which the lens can be rotated left and right.

4. The rigid strip box damage defect detection bracket according to claim 1, characterized in that: The light intensity self-adjustment circuit is a brightness adjustment circuit based on PWM signals.

5. The rigid strip box damage defect detection bracket according to claim 4, characterized in that: The brightness adjustment circuit based on the PWM signal includes a photoresistor R1, a PWM signal generator, an LED driver switch, diodes D1 and D2, a capacitor C1, and a fixed resistor R2. The photoresistor R1 and the fixed resistor R2 form a voltage divider circuit, and the resistance of the photoresistor R1 decreases when the ambient light increases. The PWM signal generator is configured in astable mode, and the duty cycle is adjusted by separating the charging and discharging circuits of diodes D1 and D2 to generate a PWM signal. The LED driver switch is controlled by a PWM signal, and the brightness is adjusted by regulating the conduction time.

6. The rigid strip box damage defect detection bracket according to claim 5, characterized in that: The photoresistor R1 is connected in parallel with a potentiometer to manually set the minimum / maximum brightness threshold.

7. The rigid strip box damage defect detection bracket according to claim 5, characterized in that: The PWM signal generator is connected in parallel with a 10μF electrolytic capacitor to suppress power supply noise.

8. The rigid strip box damage defect detection bracket according to claim 1, characterized in that: The fixing hole is a fixing screw hole with a shock-absorbing rubber ring.

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