An inspection system and method for bale detection

Abstract

The application discloses a kind of point inspection system and method for bale detection, its system includes bale detection equipment, state monitoring unit, splice joint detection unit, defect library unit, timing issuing unit, point inspection control unit and state indicating unit, point inspection control unit includes first point inspection mode control subunit, second point inspection mode control subunit and point inspection record subunit, the purpose of the application is to provide a kind of point inspection system and method for bale detection, the application is fused two kinds of point inspection mode, monitor the state of bale detection equipment on one hand, verify the detection ability of bale detection equipment to bale defect and the detection ability to multiple defects on the other hand, realize full coverage, high frequency, non-stop point inspection, to overcome the problems pointed out in the background art.

Description

Technical Field

[0001] This invention relates to the field of detection technology, and specifically to an inspection system and method for detecting loose packages. Background Technology

[0002] Loose package inspection equipment is an important quality inspection device installed on small box transparent paper packaging machines. It is used to detect whether there are loose package defects (all substandard film packaging is referred to as loose package) during the transparent paper packaging process and to perform rejection operations. It is a key device to ensure product quality. However, loose package inspection equipment may fail to detect due to malfunctions or low accuracy, resulting in a large number of missed detections and rejections. Therefore, ensuring the effectiveness of the loose package inspection equipment itself is particularly important.

[0003] Currently, the effectiveness of loose-pack cigarette detection equipment is typically verified through manual inspection: operators periodically loosen the film at the hexagonal wheels of the equipment to create a simulated loose cigarette pack, and then observe whether the equipment can successfully detect and reject the pack. If it rejects the pack, it is considered effective; if it does not, it is considered ineffective. However, this method has the following drawbacks:

[0004] 1. Traditional manual inspection requires machine downtime, resulting in a 5-10 minute loss of production capacity per inspection. Furthermore, the randomness of manually generating loose packs of cigarettes makes standardized operation impossible, compromising the reliability of inspection results.

[0005] 2. Due to the limited cost of manual operation, bulk packaging inspection equipment is usually only inspected 1-2 times per week. If the equipment malfunctions during the inspection interval, it may cause a batch of quality accidents that are not discovered until later.

[0006] 3. Traditional inspection can only verify the defect of "loose packaging" and cannot verify the equipment's ability to detect other types of defects (damage, missing parts, wrinkles, etc.).

[0007] 4. When equipment malfunctions, it is only indicated by the alarm light, and the type and cause of the malfunction cannot be determined remotely. Maintenance personnel need to conduct on-site inspections, and the average malfunction recovery time exceeds 30 minutes.

[0008] To address the above problems, this invention provides an inspection system and method for detecting loose packages. Summary of the Invention

[0009] The purpose of this invention is to provide an inspection system and method for loose package detection. This invention integrates two inspection modes: on the one hand, it monitors the status of the loose package detection equipment, and on the other hand, it verifies the detection capability of the loose package detection equipment for loose package defects and for multiple types of defects, thereby achieving full coverage, high frequency, and non-stop inspection, thus overcoming the problems pointed out in the background art.

[0010] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0011] An inspection system for detecting loose packages includes,

[0012] The bulk packaging inspection equipment is installed on the small box transparent paper packaging machine. It is configured to receive defect images and compare them with the acquired images to detect various defects in the transparent paper packaging process. When a defect is detected, it outputs a rejection signal and performs a rejection operation.

[0013] The status monitoring unit, which is connected to the loose package detection equipment, is configured to monitor the operating status of the loose package detection equipment in real time and send the results.

[0014] The splice detection unit is configured to detect the splice passing signal during the transparent paper replacement process, thereby generating a first trigger signal;

[0015] The defect image library unit is configured to store and send images of various types of packaging defects.

[0016] The timed delivery unit is configured to select defect images from the defect image library unit at preset time intervals and deliver them to the loose package detection equipment for testing, while simultaneously generating a second trigger signal;

[0017] The inspection control unit includes a first inspection mode control subunit, a second inspection mode control subunit, and an inspection record subunit. The first inspection mode control subunit is connected to the splice detection unit to receive a first trigger signal and execute a first inspection mode. The first inspection mode is configured to monitor whether the loose package detection equipment outputs a rejection signal within a preset time window. The second inspection mode control subunit is connected to a timed delivery unit to receive a second trigger signal and execute a second inspection mode. The second inspection mode is configured to receive the processing result of the loose package detection equipment on the delivered defect image, compare the processing result with the preset defect type of the image, and calculate the detection accuracy. The inspection record subunit is used to record the results of the two inspection modes and send them.

[0018] The status indication unit, which is connected to the status monitoring unit and the inspection control unit respectively, is configured to issue different levels of warnings based on the results of the status monitoring unit and the inspection control unit.

[0019] Furthermore, the status monitoring unit includes:

[0020] Communication Status Monitoring Subunit: Used to monitor the communication status of the loose package detection equipment, and generates a communication abnormality signal when communication is interrupted;

[0021] Rejection Function Monitoring Subunit: Used to monitor the rejection function status of the bulk package inspection equipment, and generates an abnormal rejection function signal when the rejection function is turned off;

[0022] Detection and counting subunit: used to count the number of packages detected by the bulk packaging detection equipment;

[0023] Rejection Counting Subunit: Used to count the number of packages rejected by the loose package detection equipment and calculate the rejection frequency.

[0024] Furthermore, the splice detection unit includes:

[0025] Splice joint sensor: Installed at the transparent paper splicing station, used to detect the physical signal generated by the splice joint passing through during the transparent paper replacement process;

[0026] Signal processing subunit: used to filter and de-jitter the signal detected by the splicing joint sensor to generate a stable first trigger signal;

[0027] The splice joint sensor, signal processing subunit, and first inspection mode control subunit are connected in sequence.

[0028] Furthermore, the defect image library unit includes:

[0029] The defect library construction sub-unit is used to collect and label various defect samples to build a defect library.

[0030] Image Library Management Subunit: Used for managing and retrieving defective image libraries;

[0031] Sample annotation subunit: used to annotate defect images, including defect type, defect location, defect size, and confidence threshold;

[0032] The image library management subunit and the sample annotation subunit are respectively connected to the image library construction subunit.

[0033] Furthermore, the timed delivery unit includes:

[0034] The timed setting sub-unit is used to set the time interval for issuing tests;

[0035] The image selection sub-unit is used to select defect images to be distributed from the defect image library unit;

[0036] The execution subunit is dispatched to send the selected defect images to the bulk packaging inspection equipment;

[0037] The timing setting subunit, image selection subunit, and execution delivery subunit are connected sequentially.

[0038] Furthermore, it also includes a data recording and analysis unit, which is connected to the status indication unit. The data recording and analysis unit is configured to record data such as inspection results, equipment status changes, defect detection accuracy, and rejection frequency.

[0039] Furthermore, the types of packaging defect images stored in the defect image library unit include at least two of the following: loose packaging defects, damaged packaging materials, missing packaging materials, and packaging wrinkles.

[0040] On the other hand, based on this inspection system, the present invention also provides an inspection method for detecting loose packages, comprising:

[0041] The status monitoring unit monitors the operating status of the bulk package detection equipment in real time and generates operating status results, including communication status, rejection function status, detection count, and rejection count.

[0042] The splice detection unit monitors the splice passing signal during the transparent paper replacement process and generates a first trigger signal. The first trigger signal triggers the point inspection control unit to execute the first point inspection mode. In this mode, the loose package detection equipment is monitored within a preset time window to output a rejection signal, thereby generating the first point inspection result.

[0043] The timed delivery unit selects defect images from the defect image library unit and sends them to the loose package detection equipment for testing at preset time intervals. At the same time, a second trigger signal is generated. The second trigger signal triggers the inspection control unit to execute the second inspection mode. In this mode, the processing result of the loose package detection equipment on the delivered defect images is received, and the processing result is compared with the preset defect type of the image. The detection accuracy is calculated, thereby generating the second inspection result.

[0044] The operation status results, the first inspection results, and the second inspection results are sent to the status indication unit, which provides multi-level visual feedback through alarm lights and human-machine interface.

[0045] The data recording and analysis unit records inspection results, defect detection accuracy, equipment status changes, and rejection frequency data, performs trend analysis, and generates reports.

[0046] Furthermore, in the first inspection mode, if a rejection signal is detected within a preset time window, the first inspection mode is deemed to have passed; if no rejection signal is detected within the preset time window, the first inspection mode is deemed to have failed, and a first failure alarm signal is generated.

[0047] In the second inspection mode, when the detection accuracy of a certain type of defect is lower than a preset threshold, a second failure alarm signal is generated.

[0048] Compared with the prior art, the beneficial effects of the present invention are:

[0049] 1. This invention includes a splice detection unit to detect splices during the transparent paper replacement process, automatically triggering the first inspection mode. It also includes a timed data transmission unit that selects defect images from a defect image library at preset time intervals and transmits them to the bulk packaging inspection equipment for testing. Simultaneously, a second trigger signal is generated to activate the second inspection mode, eliminating the need for machine downtime and manual intervention, thus completely solving the problem of traditional manual inspections taking up production time. The first inspection mode operates at the same frequency as the transparent paper replacement, automatically executing once per roll of transparent paper replacement, approximately 8 times per day. The second inspection mode can be set at specific time intervals, resulting in a combined inspection frequency of over 14 times per day. Equipment failures can be detected within 1-2 hours, reducing fault detection time by over 95% and effectively preventing batch quality accidents.

[0050] 2. During the inspection process, the operating status of the loose package inspection equipment is monitored in real time through the status monitoring unit, including communication status, rejection function status, inspection count, rejection count, etc. The first inspection mode can monitor whether the loose package inspection equipment outputs rejection signals within a preset time window, thereby verifying the loose package inspection equipment's ability to detect loose package defects. The second inspection mode can receive the processing results of the loose package inspection equipment on the issued defect images, compare the processing results with the preset defect types of the images, and calculate the detection accuracy rate, thereby verifying the loose package inspection equipment's ability and accuracy in detecting multiple types of defects. Through real-time monitoring of the loose package inspection equipment and the two inspection modes, the detection coverage is improved and detection blind spots are eliminated.

[0051] 3. This invention includes a status indicator unit that provides multi-level visual feedback via alarm lights and a human-machine interface based on the operating status results, the first inspection results, and the second inspection results. Operators can easily grasp the equipment status and fault type. Maintenance personnel can prepare maintenance tools and spare parts in advance based on the fault information displayed on the interface, reducing the average fault recovery time from 30 minutes to less than 10 minutes.

[0052] 4. The data recording and analysis unit records inspection results, equipment status changes, defect detection accuracy, rejection frequency, and other data, which facilitates the prediction of potential failures through trend analysis, enabling predictive maintenance and further reducing equipment failure rate. Attached Figure Description

[0053] Figure 1 This is a structural block diagram of the inspection system described in this invention.

[0054] Figure 2 This is a block diagram of the condition monitoring unit.

[0055] Figure 3 This is a structural block diagram of the splice detection unit.

[0056] Figure 4 This is a structural block diagram of the defect image library unit.

[0057] Figure 5 The structural block diagram for the timed delivery unit.

[0058] Figure 6 This is a schematic diagram of the timed delivery setting interface in an embodiment of the present invention.

[0059] Figure 7 This is a schematic diagram of the interface for the first inspection mode (joint trigger) in an embodiment of the present invention.

[0060] Figure 8 This is a schematic diagram of the result interface of the second inspection mode (image library distribution) in an embodiment of the present invention.

[0061] Figure 9 This is a schematic diagram of a multi-level status indicator interface in an embodiment of the present invention.

[0062] In the diagram, 1-Package inspection equipment, 2-Status monitoring unit, 2a-Communication status monitoring subunit, 2b-Rejection function monitoring subunit, 2c-Detection counting subunit, 2d-Rejection counting subunit, 3-Joint detection unit, 3a-Joint sensor, 3b-Signal processing subunit, 4-Defect image library unit, 4a-Image library construction subunit, 4b-Image library management subunit, 4c-Sample annotation subunit, 5-Timed distribution unit, 5a-Timed setting subunit, 5b-Image selection subunit, 5c-Distribution execution subunit, 6-Inspection control unit, 6a-First inspection mode control subunit, 6b-Second inspection mode control subunit, 6c-Inspection record subunit, 7-Status indication unit, 8-Data recording and analysis unit. Detailed Implementation

[0063] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0064] refer to Figure 1 As shown, the present invention provides an inspection system for detecting loose packages, comprising,

[0065] Loose package inspection equipment 1 is installed on a small box transparent paper packaging machine and is configured to receive defect images and compare them with the acquired images to detect various defects in the transparent paper packaging process. When a defect is detected, it outputs a rejection signal and performs a rejection operation.

[0066] The loose package inspection device 1 employs a vision inspection device, which consists of a light source module, an industrial camera, an image processing and analysis module, a communication module, and an execution and rejection module. It should be noted that the loose package inspection device 1 is prior art, and this application does not make any improvements to its structure.

[0067] The status monitoring unit 2 is connected to the loose package detection device 1 and is configured to monitor the operating status of the loose package detection device 1 in real time and send the results. Its operating status includes communication status, rejection function status, detection count, and rejection count.

[0068] refer to Figure 2 As shown, specifically, in order to detect its operating status, the status monitoring unit 2 includes:

[0069] Communication status monitoring subunit 2a: used to monitor the communication status of the loose package detection device 1. When communication is interrupted, a communication abnormality signal is generated. The specific monitoring process is as follows: the communication status monitoring subunit 2a monitors the communication status between the camera and the controller in the loose package detection device in real time through the heartbeat packet mechanism. It sends a heartbeat request every 100ms. If there is no response for 3 consecutive times, the communication is determined to be abnormal.

[0070] Rejection function monitoring subunit 2b: Used to monitor the rejection function status of the bulk package detection equipment 1. When the rejection function is turned off, a rejection function abnormal signal is generated. The specific monitoring process is as follows: The rejection function signal output by the PLC is monitored by the rejection function monitoring subunit 2b. When the signal is low, it is determined that the rejection enable is turned off.

[0071] Detection counting subunit 2c: used to count the number of items detected by the bulk package detection device 1;

[0072] Rejection counting subunit 2d: used to count the number of rejections by the loose package detection device 1 and calculate the rejection frequency;

[0073] The detection counting subunit 2c and the rejection counting subunit 2d read the counting register of the loose package detection device 1 to obtain the detection quantity and rejection quantity every minute and calculate the real-time rejection frequency.

[0074] The status monitoring unit 2 monitors the operating status of the bulk packaging inspection equipment 1 in real time. When a failure occurs due to equipment malfunction, it can be detected in time to prevent batch quality accidents.

[0075] The splice detection unit 3 is configured to detect the splice passing signal during the transparent paper replacement process, thereby generating a first trigger signal;

[0076] refer to Figure 3 As shown, specifically, the splice detection unit 3 includes:

[0077] Splice joint sensor 3a: Installed at the transparent paper splicing station, it is used to detect the physical signal generated by the splice joint passing through during the transparent paper replacement process. The splice joint sensor 3a can be a through-beam photoelectric switch or an RGB color sensor to detect the splice joint. When a through-beam photoelectric switch is used, the light is blocked when the transparent paper splice joint passes through, generating a pulse signal.

[0078] Signal processing subunit 3b: used to filter and de-jitter the signal detected by splice joint sensor 3a, eliminate false triggering caused by jitter or interference, and thus generate a stable first trigger signal;

[0079] The splice joint sensor 3a, the signal processing subunit 3b, and the first inspection mode control subunit 6a are connected in sequence, so that the signal detected by the splice joint sensor 3a can be processed by the signal processing subunit 3b and a stable first trigger signal is generated after processing.

[0080] The defect image library unit 4 is configured to store and send various types of packaging defect images. The types of packaging defect images stored in the defect image library unit 4 include at least two of the following: loose packaging defects, damaged packaging materials, missing packaging materials, and packaging wrinkles.

[0081] refer to Figure 4 As shown, specifically, the defect image library unit 4 includes:

[0082] Library Construction Subunit 4a: Used to collect and label various defect samples to build a defect library;

[0083] Image library management subunit 4b: used for managing and retrieving defect image libraries, supporting multi-dimensional retrieval by defect type, severity, etc.; Sample annotation subunit 4c: used for annotating defect images, with annotation content including defect type, defect location, defect size, and confidence threshold.

[0084] The image library management subunit 4b and the sample annotation subunit 4c are respectively connected to the image library construction subunit 4a.

[0085] The timed delivery unit 5 is configured to select defect images from the defect image library unit 4 and send them to the loose package detection device 1 for testing at a preset time interval, which can be set as needed, and at the same time generate a second trigger signal.

[0086] refer to Figures 5-6 As shown, specifically, the timed delivery unit 5 includes:

[0087] The timed setting subunit 5a is used to set the time interval for issuing tests. The time interval can be set in minutes, hours or days as needed. In this embodiment, it is set to be executed once every 4 hours, and executed 6 times a day at 0:00, 4:00, 8:00, 12:00, 16:00 and 20:00.

[0088] Image selection subunit 5b is used to select defect images to be distributed from defect image library unit 4. Preferably, it supports polling by type, random selection or selection by priority strategy.

[0089] The execution subunit 5c is used to send the selected defect images to the loose package detection device 1. Preferably, the selected defect images are 2-5 images of each type. The selected defect images are sent to the loose package detection device 1 via FTP or MQTT protocol.

[0090] The timing setting subunit 5a, image selection subunit 5b, and execution subunit 5c are connected in sequence, thereby enabling the timing of sending images from the defect image library unit 4 to the bulk package detection device 1 as a benchmark for defect comparison.

[0091] The inspection control unit 6 includes a first inspection mode control subunit 6a, a second inspection mode control subunit 6b, and an inspection recording subunit 6c. The first inspection mode control subunit 6a is connected to the splice detection unit 3 to receive a first trigger signal and execute a first inspection mode. The first inspection mode is configured to monitor whether the loose package detection device 1 outputs a rejection signal within a preset time window, thereby verifying the loose package detection device 1's ability to detect loose package defects. The second inspection mode control subunit 6b is connected to the timed delivery unit 5 to receive a second trigger signal and execute a second inspection mode. The second inspection mode is configured to receive the processing results of the loose package detection device 1 on the delivered defect images, compare the processing results with the preset defect types of the images, and calculate the detection accuracy rate, thereby verifying the device's ability to detect multiple types of defects. The first inspection mode control subunit 6a and the second inspection mode control subunit 6b are respectively connected to the inspection recording subunit 6c, which is used to record the results of the two inspection modes and send them.

[0092] The status indication unit 7 is connected to the status monitoring unit 2 and the inspection control unit 6 respectively. It is configured to issue different levels of warnings based on the results of the status monitoring unit 2 and the inspection control unit 6. Specifically, the status indication unit 7 includes an alarm light and a human-machine interface. Different levels of warnings can be reflected by the color combination of the alarm light and the human-machine interface, so that maintenance personnel can know the cause of the fault in a timely manner and save the troubleshooting process.

[0093] In addition, the system also includes a data recording and analysis unit 8, which is connected to the status indication unit 7. The data recording and analysis unit 8 is configured to record data such as inspection results, equipment status changes, defect detection accuracy, and rejection frequency.

[0094] It is worth noting that the defect library unit 4, the timed distribution unit 5, the inspection control unit 6, the data recording and analysis unit 8, and the status monitoring unit 2 described in this invention can be set as independent modules, or they can be set as software program function modules on an industrial control computer. For example, in some embodiments, the hardware configuration of the inspection system includes a high-performance industrial control computer (installed with intelligent inspection system software, whose timed distribution interface and inspection mode software interface are as follows). Figures 6-8 The system includes a bulk packaging inspection device (installed on the small box transparent paper packaging machine), a splicing joint sensor (installed at the transparent paper splicing station), alarm lights, and a human-machine interface display screen. In this embodiment, a high-performance industrial control computer serves as the operating platform for the inspection system. It is equipped with a high-performance CPU and storage devices to run system software, store defect images, and record historical inspection data. The industrial control computer connects to the bulk packaging inspection device via Ethernet, collects equipment status data in real time, and sends defect images and retrieves results via FTP / MQTT protocols. The splicing joint sensor uses a through-beam photoelectric switch and is installed at the transparent paper splicing station. When the transparent paper is replaced, the splicing joint passes through the sensor, generating a trigger signal that is input to the industrial control computer. The alarm lights are three-color (red / yellow / green), and the human-machine interface is a touchscreen installed at the operating station for easy observation by the operator.

[0095] It should also be noted that the connection described in this invention refers to the method of data or signal transmission, and is not limited to physical connection.

[0096] Based on the above-described inspection system for detecting loose packages, the present invention also provides an inspection method for detecting loose packages, comprising:

[0097] The status monitoring unit 2 monitors the operating status of the loose package detection device 1 in real time and generates operating status results, including communication status, rejection function status, detection count, and rejection count.

[0098] The splice detection unit 3 monitors the splice passing signal during the transparent paper replacement process and generates a first trigger signal. The first trigger signal triggers the point inspection control unit 6 to execute the first point inspection mode. In this mode, the loose package detection device 1 is monitored within a preset time window to output a rejection signal, thereby generating the first point inspection result.

[0099] Specifically, if a rejection signal is detected within a preset time window, the first inspection mode is deemed to have passed; if no rejection signal is detected within the preset time window, the first inspection mode is deemed to have failed, and a first failure alarm signal is generated. Preferably, the preset time window is 5 seconds, that is, from the moment the trigger signal is received, the loose package detection device 1 is monitored for outputting a rejection signal within a 5-second time window. If a rejection signal is detected within 5 seconds, the first inspection mode is deemed to have passed, and "joint mode - successful" is recorded; if no rejection signal is detected within 5 seconds, the first inspection mode is deemed to have failed, "joint mode - failed" is recorded, and a first failure alarm signal is generated.

[0100] The timed delivery unit 5 selects defect images from the defect image library unit 4 and sends them to the loose package detection device 1 for testing at preset time intervals, and at the same time generates a second trigger signal. The second trigger signal triggers the inspection control unit 6 to execute the second inspection mode. In this mode, the processing result of the loose package detection device 1 on the delivered defect images is received, and the processing result is compared with the preset defect type of the image. The detection accuracy is calculated, thereby generating the second inspection result.

[0101] Specifically, in the second inspection mode, when the detection accuracy of a certain type of defect is lower than a preset threshold, a second failure alarm signal is generated.

[0102] The running status results, the first inspection results, and the second inspection results are sent to the status indication unit 7. The status indication unit 7 provides multi-level visual feedback through alarm lights and human-machine interface.

[0103] The data recording and analysis unit 8 records inspection results, defect detection accuracy, equipment status changes, and rejection frequency data, performs trend analysis, and generates reports.

[0104] For providing multi-level visual feedback through alarm lights and human-machine interfaces, refer to... Figure 9 As shown, the method used in this embodiment is as follows:

[0105] When the status monitoring unit 2 detects that the loose package detection equipment has a communication abnormality or the rejection function is turned off, the control alarm light will be constantly lit in red, the human-machine interface will display a red background and the message "Rejection is turned off or communication is abnormal, please call maintenance personnel for handling" will be displayed.

[0106] When the number of consecutive failures in the first inspection mode reaches the preset number, the control alarm light will be constantly lit in orange, and the human-machine interface will display an orange background and the message "Package validity verification failed, please call maintenance personnel for processing" will be displayed.

[0107] When the accuracy rate of a certain type of defect detection in the second inspection mode is lower than the preset threshold, the control alarm light will flash orange, the human-machine interface will display an orange background and the message "Defect detection accuracy rate has decreased, please check equipment parameters" will be displayed.

[0108] When the loose cigarette detection device 1 normally rejects loose cigarette packs, the control alarm light flashes yellow for a preset time and then turns off. The human-machine interface briefly displays a yellow background and shows "Loose cigarette pack rejected".

[0109] When the status monitoring unit detects that the rejection frequency exceeds the preset frequency threshold, the control alarm light flashes yellow, the human-machine interface displays a yellow background and shows "High rejection frequency of loose cigarettes, please call maintenance personnel for adjustment";

[0110] When all conditions are normal, the alarm light goes out, the human-machine interface displays a green background and shows "Package detection normal".

[0111] In this specification, terms such as "one embodiment," "another embodiment," "embodiment," and "preferred embodiment" refer to specific features, structures, or characteristics described in connection with that embodiment, which are included in at least one embodiment described in the general description of this application. The appearance of the same term in multiple places in the specification does not necessarily refer to the same embodiment. Furthermore, when a specific feature, structure, or characteristic is described in connection with any embodiment, the intention is to suggest that implementing such a feature, structure, or characteristic in conjunction with other embodiments also falls within the scope of this invention.

[0112] Although the invention has been described herein with reference to several illustrative embodiments, it should be understood that many other modifications and implementations can be devised by those skilled in the art, which will fall within the scope and spirit of the principles disclosed herein. More specifically, various modifications and improvements can be made to the components or layout of the subject matter arrangement within the scope of the disclosure, drawings, and claims. Besides modifications and improvements to the components or layout, other uses will be apparent to those skilled in the art.

Claims

1. An inspection system for detecting loose packages, characterized in that, include, Loose packaging inspection equipment (1), which is installed on a small box transparent paper packaging machine, is configured to receive defect images and compare them with the collected images to detect various defects in the transparent paper packaging process. When a defect is detected, a rejection signal is output and a rejection operation is performed. The status monitoring unit (2), which is connected to the loose package detection device (1), is configured to monitor the operating status of the loose package detection device (1) in real time and send the results; The splice detection unit (3) is configured to detect the splice passing signal during the transparent paper replacement process, thereby generating a first trigger signal; The defect image library unit (4) is configured to store and send images of various types of packaging defects. The timed delivery unit (5) is configured to select defect images from the defect image library unit (4) and send them to the loose package detection device (1) for testing at preset time intervals, and at the same time generate a second trigger signal; The inspection control unit (6) includes a first inspection mode control subunit (6a), a second inspection mode control subunit (6b), and an inspection record subunit (6c). The first inspection mode control subunit (6a) is connected to the splice detection unit (3) to receive a first trigger signal and execute a first inspection mode. The first inspection mode is configured to monitor whether the loose package detection device (1) outputs a rejection signal within a preset time window. The second inspection mode control subunit (6b) is connected to the timed delivery unit (5) to receive a second trigger signal and execute a second inspection mode. The second inspection mode is configured to receive the processing result of the loose package detection device (1) on the issued defect image, compare the processing result with the preset defect type of the image, and calculate the detection accuracy. The inspection record subunit (6c) is used to record the results of the two inspection modes and send them. The status indication unit (7), which is connected to the status monitoring unit (2) and the inspection control unit (6) respectively, is configured to issue different levels of warnings based on the results of the status monitoring unit (2) and the inspection control unit (6).

2. The inspection system for detecting loose packages according to claim 1, characterized in that, The status monitoring unit (2) includes: Communication status monitoring subunit (2a): used to monitor the communication status of the loose package detection device (1), and generate a communication abnormality signal when communication is interrupted; The rejection function monitoring subunit (2b) is used to monitor the rejection function status of the bulk package detection equipment (1) and generates an rejection function abnormality signal when the rejection function is turned off. Detection counting subunit (2c): used to count the number of items detected by the bulk package detection device (1); Rejection counting subunit (2d): used to count the number of rejections by the loose package detection equipment (1) and calculate the rejection frequency.

3. The inspection system for detecting loose packages according to claim 1, characterized in that, The splice detection unit (3) includes: Splice joint sensor (3a): Installed at the transparent paper splicing station to detect the physical signal generated by the splice joint passing through during the transparent paper replacement process; Signal processing subunit (3b): used to filter and de-jitter the signal detected by the splice joint sensor (3a) to generate a stable first trigger signal; The splicing joint sensor (3a), signal processing subunit (3b), and first inspection mode control subunit (6a) are connected in sequence.

4. The inspection system for detecting loose packages according to claim 1, characterized in that, The defect library unit (4) includes: Image library construction subunit (4a): used to collect and label various defect samples to build a defect image library; Image library management subunit (4b): used for managing and retrieving defective image libraries; Sample annotation subunit (4c): used to annotate defect images, including defect type, defect location, defect size, and confidence threshold; The image library management subunit (4b) and the sample annotation subunit (4c) are respectively connected to the image library construction subunit (4a).

5. The inspection system for detecting loose packages according to claim 1, characterized in that, The timed delivery unit (5) includes: The timed setting sub-unit (5a) is used to set the time interval for issuing tests; The image selection subunit (5b) is used to select the defect image to be distributed from the defect image library unit (4); The execution subunit (5c) is used to send the selected defect image to the bulk packaging detection device (1). The timing setting subunit (5a), image selection subunit (5b), and execution delivery subunit (5c) are connected in sequence.

6. The inspection system for detecting loose packages according to claim 1, characterized in that, It also includes a data recording and analysis unit (8), which is connected to the status indication unit (7). The data recording and analysis unit (8) is configured to record data such as inspection results, equipment status changes, defect detection accuracy, and rejection frequency.

7. The inspection system for detecting loose packages according to claim 1, characterized in that, The types of packaging defect images stored in the defect image library unit (4) include at least two of the following: loose packaging defects, damaged packaging materials, missing packaging materials, and packaging wrinkles.

8. A method for detecting loose packages, characterized in that, include: The status monitoring unit (2) monitors the operation status of the loose package detection equipment (1) in real time and generates operation status results, including communication status, rejection function status, detection count, and rejection count. The splice detection unit (3) monitors the splice passing signal during the transparent paper replacement process and generates a first trigger signal. The first trigger signal triggers the point inspection control unit (6) to execute the first point inspection mode. In this mode, the loose package detection device (1) is monitored within a preset time window to output a rejection signal, thereby generating the first point inspection result. The timed delivery unit (5) selects defect images from the defect image library unit (4) and sends them to the loose package detection device (1) for testing according to the preset time interval. At the same time, a second trigger signal is generated. The second trigger signal triggers the inspection control unit (6) to execute the second inspection mode. In this mode, the processing result of the loose package detection device (1) on the sent defect images is received, and the processing result is compared with the preset defect type of the image. The detection accuracy is statistically analyzed, thereby generating the second inspection result. The running status results, the first inspection results, and the second inspection results are sent to the status indication unit (7), and the status indication unit (7) provides multi-level visual feedback through the alarm lights and the human-machine interface; The data recording and analysis unit (8) records the inspection results, defect detection accuracy, equipment status changes, and rejection frequency data, performs trend analysis, and generates reports.

9. The inspection method for detecting loose packages according to claim 1, characterized in that, In the first inspection mode, if a rejection signal is detected within a preset time window, the first inspection mode is deemed to have passed; if no rejection signal is detected within the preset time window, the first inspection mode is deemed to have failed, and a first failure alarm signal is generated. In the second inspection mode, when the detection accuracy of a certain type of defect is lower than a preset threshold, a second failure alarm signal is generated.

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