Zero-leakage visual inspection method and device

Abstract

The application discloses a zero-leakage mark visual detection method and device, and the method comprises the following steps: if the quality identification result of the current product to be detected is a good product, a good product signal is sent to a marking machine; if the marking machine does not receive the good product signal, the marking machine performs marking processing on the current product to be detected, and accumulates the current marking number; the current product to be detected is subjected to leak mark detection; if it is detected that the preset position of the current product to be detected has a label, the current product to be detected is subjected to drop mark detection; if it is detected that the preset position of the current product to be detected has a label, the current label number is accumulated; whether the current marking number and the current label number are consistent is judged, if yes, the zero-leakage mark visual detection of the current product to be detected is ended; the application can effectively avoid missed detection, and the consistency of the current marking number and the current label number is judged, so that the consistency judgment of the marking number and the current label number forms a closed-loop interlocking, and effectively prevents leak marks.

Description

Technical Field

[0001] This invention relates to the field of visual inspection technology, and more particularly to a visual inspection device and method for zero-missing labels. Background Technology

[0002] Defective product control and detection systems are widely used and indispensable in industry. By comparing the zero-missing-labeling system method for defective product control and detection with conventional methods, the following drawbacks of conventional control methods are summarized (using labels as an example for marking defective products):

[0003] 1. Uniqueness: In conventional defect marking methods, there are corresponding sensors to identify the label paper (such as labels made by label printers, inkjet printers, etc.). Since the label paper may fly off and fall off at high speed, the label printer's label outlet and the sensor for detecting missing labels are close together. If the label is not firmly attached, the label may fly off at too high a speed, causing defective products to be missed and fall off.

[0004] 2. Limitations: If the computer crashes, displays a blue screen, or the heartbeat signal of the host computer software and label reader still exists, the detection and recognition system may not be able to output the label signal. In such cases, the material or item being detected may have already been transferred to another location, resulting in the risk of missed detection.

[0005] 3. Poor reliability: For example, conventional label printers directly output a missing label alarm and stop the machine to replenish the label paper. They do not compare the consistency between the number of labels dispensed and the number of missing labels detected, which makes it impossible to form a closed loop in the counting and results in poor reliability. Summary of the Invention

[0006] The purpose of this invention is to provide a zero-missing-label visual inspection device and method. It utilizes the principle of negative feedback, so that the marking machine only responds to mark the product to be inspected when it does not receive a good product signal. This effectively avoids missed detections caused by system crashes, blue screens, or residual heartbeat signals. Furthermore, a label drop detection step is added after the conventional missing label detection. During the label drop detection process, the current number of labels is accumulated to determine the consistency between the current number of labels and the current number of labels. This creates a closed-loop interlock in the consistency determination between the number of labels and the current number of labels, effectively preventing missing labels.

[0007] To achieve the above objectives, this invention discloses a zero-missing-label visual detection method, which includes the following steps:

[0008] S1. Perform quality identification on the current product to be inspected, and the quality identification results include good products and defective products;

[0009] S2. If the quality identification result of the product to be inspected is good, then send a good signal to the marking machine;

[0010] S3. If the marking machine does not receive a good product signal, the marking machine will mark the current product to be inspected to affix a label to the current product to be inspected and accumulate the current number of marks.

[0011] S4. Perform a label leakage detection on the current product to be tested;

[0012] S5. If a label is detected at a preset position of the product to be tested, then a label removal detection is performed on the product to be tested.

[0013] S6. If a label is detected at a preset location of the product to be inspected, the current number of labels is accumulated.

[0014] S7. Determine whether the current number of markings is consistent with the current number of labels. If they are consistent, end the zero-missing label visual inspection of the current product to be inspected.

[0015] Preferably, step S2 further includes:

[0016] If the marking machine is unable to mark the product to be inspected, it will stop and issue a stop-and-re-mark request.

[0017] Preferably, step S5 further includes:

[0018] If the system detects that the preset location of the product to be tested does not have a label, the system will stop and issue a stop-and-label request.

[0019] Preferably, step S7 further includes:

[0020] If there is a discrepancy, the system will be shut down and a request for a replacement label will be issued.

[0021] Preferably, in step S3, the marking machine performs marking processing on the current product to be inspected, so as to affix a label to the current product to be inspected and accumulate the current number of marks, specifically including:

[0022] The marking machine marks the product to be inspected to form a label at a preset position on the product and accumulates the current number of marks.

[0023] Preferably, in step S5, the label removal detection of the current product to be tested specifically includes:

[0024] The label position of the product to be detected is tracked using a position-following algorithm;

[0025] Perform label removal detection on the product to be tested.

[0026] Preferably, the product to be tested is subjected to a missing mark detection at a position immediately behind the mark outlet of the marking machine.

[0027] Preferably, the product to be tested is detected for label loss at a preset distance behind the label outlet of the marking machine.

[0028] Preferably, the preset distance is between 0.8m and 1m.

[0029] Accordingly, the present invention also discloses a zero-label-missing visual inspection device, which includes a visual inspection system, a marking machine, a label-missing detection system, and a label-dropping detection system, wherein,

[0030] The visual inspection system is used to identify the quality of the product to be inspected. The quality identification result includes good products and defective products. If the quality identification result of the product to be inspected is good, the visual inspection system sends a good product signal to the marking machine.

[0031] If the marking machine does not receive a good product signal, the marking machine will mark the current product to be inspected to affix a label to the current product to be inspected and accumulate the current number of marks.

[0032] The missing label detection system is used to detect missing labels on the current product to be tested, and the missing label detection system is used to detect missing labels on the current product to be tested. If the missing label detection system detects that there is a label at a preset position on the current product to be tested, the missing label detection system will detect the missing label on the current product to be tested.

[0033] The missing label detection system determines whether the current number of labels applied is consistent with the current number of labels. If they are consistent, the zero-missing label visual detection of the current product to be tested ends.

[0034] Compared with existing technologies, this invention improves the marking response logic in two ways. Specifically, it sends a "good" signal to the marking machine only when the quality identification result of the current product to be inspected is "good." Utilizing the principle of negative feedback, the marking machine only responds to mark the current product to be inspected when it does not receive a "good" signal, effectively avoiding missed detections caused by system crashes, blue screens, or residual heartbeat signals. In addition, it adds a label drop detection step after the conventional missing label detection and accumulates the current number of labels during the label drop detection process to determine the consistency between the current number of labels and the current number of markings. This creates a closed-loop interlock in the consistency judgment between the number of labels and the current number of markings, effectively preventing missed markings. Attached Figure Description

[0035] Figure 1 This is a flowchart of the zero-missing-label visual detection method of the present invention;

[0036] Figure 2 This is a schematic diagram of the zero-missing-label visual inspection device of the present invention. Detailed Implementation

[0037] To illustrate the technical content, structural features, objectives, and effects of the present invention in detail, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0038] Please see Figure 1 As shown, the zero-label visual inspection method of this embodiment is applicable to the detection and marking of defective products of various types, including but not limited to lithium battery electrodes. The zero-label visual inspection method includes the following steps:

[0039] S1. Perform quality identification on the product to be tested, and the quality identification results include good products and defective products.

[0040] It is understood that the zero-miss visual inspection in this embodiment inspects each product to be inspected one by one. Only after the inspection of the current product to be inspected is the inspection of the next product to be inspected, thereby achieving automated zero-miss visual inspection.

[0041] In this embodiment, the specific device for quality identification is a visual inspection system, which performs real-time quality identification by acquiring image information of the product to be inspected. Of course, in other embodiments, quality identification can also be performed using methods such as ultrasound or X-rays. The specific method of quality identification is selected according to the actual product requirements and is not limited here.

[0042] S2. If the quality identification result of the product to be tested is good, then send a good signal to the marking machine.

[0043] It is understandable that if the quality identification result of the current product to be inspected is a defective product, there is no need to send a specific signal to the marking machine. Unlike the signal output type of traditional missing mark detection, this embodiment utilizes the principle of negative feedback (reverse logic). When the quality identification result is a good product, a good product signal is sent to the marking machine. When the marking machine does not receive a good product signal, it defaults to the current product to be inspected being a defective product, thereby avoiding defective products being mixed with good products due to visual inspection system malfunctions or hardware crashes.

[0044] Preferably, step S2 further includes:

[0045] If the marking machine is unable to mark the product to be inspected, it will stop and issue a stop-and-re-mark request.

[0046] Understandably, when the marking machine is unable to mark the current product due to reasons such as abnormal marking or marking blockage, this embodiment will stop the machine and issue a stop-and-re-mark request to request human intervention to check the function of the marking machine and to manually check for missing marks on the current product. After confirming that the marking machine is working properly, this embodiment will check the next product to be tested.

[0047] S3. If the marking machine does not receive a good product signal, the marking machine will mark the current product to be inspected to apply a label to the current product to be inspected and accumulate the current number of marks.

[0048] Understandably, the starting number of labels can be set according to actual needs, and correspondingly, the starting number of subsequent labels must be the same as the starting number of labels.

[0049] Ideally, the labeling method involves creating a label at a preset location on the product to be tested and accumulating the current number of labels. These labels include, but are not limited to, QR codes and barcodes. The preset location should be understood as a designated position on the product to be tested, and the labeling positions should be identical for products of the same type.

[0050] S4. Perform a label leakage detection on the current product to be tested.

[0051] It is understood that this embodiment uses a label omission detection system to detect missing labels on the product to be tested. Preferably, the label omission detection is performed on the product to be tested at a position immediately behind the label outlet of the marking machine to ensure that the label can be immediately identified by the label omission detection system after marking. The label omission detection system here includes a sensor and a counter; the sensor is used for label recognition, and the counter is used for counting.

[0052] S5. If a label is detected at a preset position of the product to be tested, then a label removal detection will be performed on the product to be tested.

[0053] It is understood that this embodiment uses a label removal detection system to detect label removal on the product to be inspected. Preferably, the label removal detection is performed on the product to be inspected at a preset distance behind the label outlet of the marking machine. More preferably, the preset distance is between 0.8m and 1m. The preset distance between the missing label detection and the label removal detection in this embodiment is designed to allow any loosely applied labels to fall off naturally during the transfer of the product to be inspected from the missing label detection station to the label removal detection station, or to effectively blow off loosely applied labels using a fan or other means, thus preventing defective products from being mixed with good products due to label detachment caused by transmission speed issues or loose labels. The label removal detection system here includes a sensor and a counter; the sensor is used for label identification, and the counter is used for counting.

[0054] Preferably, step S5 further includes:

[0055] If the system detects that the preset location of the product to be tested does not have a label, the system will stop and issue a stop-and-label request.

[0056] It is understandable that if the preset position of the product to be tested is not marked, it may be due to the marking machine failing to mark, the label falling off after marking, or the marking position being abnormal. In this case, this embodiment will stop the machine and issue a stop and re-marking request to request human intervention to manually detect missing labels on the current product to be tested and to check the next product to be tested.

[0057] Furthermore, in step S5, label removal detection is performed on the current product to be tested, specifically including:

[0058] The label location is efficiently achieved by tracking the label position of the product to be detected using a position-following algorithm.

[0059] Perform label removal detection on the product to be tested.

[0060] S6. If a label is detected at a preset location of the product to be inspected, the current number of labels is accumulated.

[0061] S7. Determine whether the current number of markings is consistent with the current number of labels. If they are consistent, end the zero-missing label visual inspection of the current product to be inspected.

[0062] Understandably, when the current number of markings is consistent with the current number of labels, that is, when the consistency judgment between the current number of markings and the current number of labels constitutes a closed-loop interlock judgment, it ensures that both the number of markings and the number of labels detected are consistent with the counting statistics, thereby determining that no missing markings have occurred.

[0063] Preferably, step S7 further includes:

[0064] If there is a discrepancy, the system will be shut down and a request for a replacement label will be issued.

[0065] It is understandable that if the number of previous labels is inconsistent with the current number of labels, it can be determined that there is an error in the label loss detection step. In this case, this embodiment will stop the machine and issue a stop-and-re-label request to request human intervention to manually detect missing labels on the current product to be tested and to check the next product to be tested.

[0066] Please see Figure 2 As shown, the zero-label-missing visual inspection device of this embodiment includes a visual inspection system 10, a marking machine 20, a label-missing detection system 30, and a label-dropping detection system 40, wherein,

[0067] The visual inspection system 10 is used to identify the quality of the product to be inspected. The quality identification result includes good products and defective products. If the quality identification result of the product to be inspected is good, the visual inspection system 10 sends a good product signal to the marking machine 20.

[0068] If the marking machine 20 does not receive a good product signal, the marking machine 20 will mark the current product to be inspected to affix a label to the current product to be inspected and accumulate the current number of marks.

[0069] The missing label detection system 30 is used to detect missing labels on the current product to be tested, and the missing label detection system 40 is used to detect missing labels on the current product to be tested. If the missing label detection system 30 detects that there is a label at a preset position on the current product to be tested, then the missing label detection system 40 will detect the missing label on the current product to be tested.

[0070] The label loss detection system 40 determines whether the current number of labels applied is consistent with the current number of labels. If they are consistent, the zero-label loss visual detection of the current product to be tested ends.

[0071] Combination Figure 1 and Figure 2 This invention improves the marking response logic in two ways. Specifically, a "good" signal is sent to the marking machine 20 only when the quality identification result of the current product to be inspected is "good". Utilizing the principle of negative feedback, the marking machine 20 only responds with a marking action and marks the current product to be inspected when it does not receive a "good" signal, effectively avoiding missed detections caused by system crashes, blue screens, or residual heartbeat signals. In addition, a label drop detection step is added after the conventional missing label detection. During the label drop detection process, the current number of labels is accumulated to determine the consistency between the current number of labels and the current number of markings. This creates a closed-loop interlock between the consistency judgment of the number of labels and the current number of markings, effectively preventing missed markings and overcoming the defects of the existing technology, such as the single detection step, limitations, and poor interlocking.

[0072] The above-disclosed embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. Therefore, any equivalent variations made in accordance with the claims of the present invention are still within the scope of the present invention.

Claims

1. A zero-leakage mark visual inspection method, characterized by, The method comprises the following steps: quality identification is performed on a current product to be detected, and the quality identification result comprises a good product and a bad product; if the quality identification result of the current product to be detected is a good product, a good product signal is sent to a marking machine; if the quality identification result of the current product to be detected is a bad product, no specific signal needs to be sent to the marking machine; if the marking machine does not receive the good product signal, the marking machine performs marking processing on the current product to be detected to mark the current product to be detected and accumulates a current marking number; leakage marking detection is performed on the current product to be detected; if a preset position of the current product to be detected is detected to have a label, off-label detection is performed on the current product to be detected; if the preset position of the current product to be detected is detected to have a label, a current label number is accumulated; it is judged whether the current marking number and the current label number are consistent, and if yes, the zero-leakage marking visual detection on the current product to be detected is ended; in the step of if the marking machine does not receive the good product signal, the marking machine performs marking processing on the current product to be detected to mark the current product to be detected and accumulates a current marking number, the marking machine performs marking processing on the current product to be detected to mark the current product to be detected and accumulates a current marking number, and specifically comprises: the marking machine performs marking processing on the current product to be detected to form a label at a preset position of the current product to be detected and accumulates a current marking number; the step of if the marking machine does not receive the good product signal, the marking machine performs marking processing on the current product to be detected to form a label at a preset position of the current product to be detected and accumulates a current marking number further comprises: if the marking machine cannot perform marking processing on the current product to be detected, the machine is stopped and a stoppage label supplement request is sent; the step of if a preset position of the current product to be detected is detected to have a label, off-label detection is performed on the current product to be detected further comprises: if the preset position of the current product to be detected is detected to have no label, the machine is stopped and a stoppage label supplement request is sent; the step of it is judged whether the current marking number and the current label number are consistent, and if yes, the zero-leakage marking visual detection on the current product to be detected is ended further comprises: if not, the machine is stopped and a stoppage label supplement request is sent; the step of if a preset position of the current product to be detected is detected to have a label, off-label detection is performed on the current product to be detected comprises: a position following algorithm is used to track a label position of the current product to be detected; off-label detection is performed on the current product to be detected.

2. The zero-leak flag vision inspection method of claim 1, wherein, Leakage marking detection is performed on the current product to be detected at a position close to a rear side of a label outlet of the marking machine.

3. The zero-leak flag vision inspection method of claim 1, wherein, Off-label detection is performed on the current product to be detected at a position at a preset distance from the rear side of the label outlet of the marking machine.

4. The zero-leak flag vision inspection method of claim 3, wherein, The preset distance is between 0.8 m and 1 m.

5. A zero-leakage mark visual inspection device, characterized by, A zero-leakage marking visual detection system for implementing the zero-leakage marking visual detection method according to any one of claims 1 to 3 comprises a visual detection system, a marking machine, a leakage marking detection system and an off-label detection system. The visual detection system is used for quality identification of the current product to be detected, and the quality identification result includes good products and defective products. If the quality identification result of the current product to be detected is a good product, the visual detection system sends a good product signal to the marking machine; If the marking machine does not receive a good product signal, the marking machine performs marking processing on the current product to be detected to mark the current product to be detected with a label and accumulates the current marking number; The missing label detection system is used for missing label detection of the current product to be detected, and the missing label detection system is used for missing label detection of the current product to be detected. If the missing label detection system detects that the current product to be detected has a label at a preset position, the missing label detection system performs missing label detection on the current product to be detected; The missing label detection system judges whether the current marking number and the current label number are consistent. If they are consistent, the zero-missing-label visual detection of the current product to be detected is ended; If the marking machine does not receive a good product signal, the marking machine performs marking processing on the current product to be detected to mark the current product to be detected with a label and accumulates the current marking number. Specifically, the marking machine performs marking processing on the current product to be detected to form a label at a preset position of the current product to be detected and accumulates the current marking number. The marking machine performs marking processing on the current product to be detected to form a label at a preset position of the current product to be detected and accumulates the current marking number.

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