Detection system applied to milk powder canning and having elimination and verification functions
By adding a first sensor and delay relay on the milk powder canning production line, secondary verification and accurate removal of batch-numbered milk powder cans are achieved, the problem of missing removal in the existing technology is solved, and product quality and production efficiency are improved.
Patent Information
- Application Number
- CN202421199941.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-29
- Publication Date
- 2025-03-25
- Estimated Expiration
- 2034-05-29
AI Technical Summary
In the current milk powder can production, there is a situation where the batch number of milk powder cans are leaked, resulting in the batch number of milk powder cans flowing to the market.
A detection system with both removal and verification functions is designed, including a detection unit, removal cylinder and control unit arranged on the gantry, a first sensor is added for secondary verification, and a delay relay is used to control the removal time.
The accuracy of removing batch-free milk powder cans has been improved, and the batch-free milk powder cans have been avoided from flowing to the market, ensuring product quality.
Smart Images
Figure CN222659325U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of milk powder canning, in particular to a detection system with both rejection and verification functions used in milk powder canning. Background Art
[0002] One of the steps in canning milk powder is to print the production batch number so that consumers can trace and check the production history of the batch of milk powder. However, there are some milk powder cans on the market that have missing or unclear production batch numbers, which not only makes the consumer experience poor, but also has a negative impact on the company.
[0003] To this end, the company added a rejection system based on OCR detection in the production of milk powder cans, including a detection unit, a rejection cylinder and a control unit. The detection unit and the control unit, as well as the control unit and the rejection cylinder are all electrically connected. The detection unit is set on the gantry above the conveying platform. The detection unit includes a photoelectric sensor and a camera; the control unit includes a control box and an industrial computer, and a PLC system is set inside the control box. During operation, the milk powder can is transported to the bottom of the gantry, triggering the photoelectric sensor, which feeds back the signal to the PLC. The PLC controls the camera to take a photo, and the photo information is transmitted to the industrial computer for calculation. The calculation result is sent to the PLC. If there is no production batch number on the milk powder can, then after the calculation result is sent to the PLC, the PLC controls the rejection cylinder to work and reject the milk powder can. Finally, the milk powder can without a production batch number is located on the rejection platform.
[0004] Normally, the multiple milk powder cans on the conveying platform are spaced evenly, for example, the time interval between two adjacent milk powder cans passing through the gantry is 1 second, at which point the above rejection system can completely reject the milk powder cans without batch numbers. However, if there is a problem with the conveying, resulting in multiple milk powder cans without batch numbers being piled up for transportation, the rejection cylinder needs to reject multiple milk powder cans without batch numbers, which will result in missed rejections, causing milk powder cans without batch numbers to flow into the market. Utility Model Content
[0005] In order to solve the above deficiencies in the prior art, the utility model aims to provide a detection system with both rejection and verification functions for use in milk powder canning, so as to improve the rejection accuracy of milk powder cans without batch numbers.
[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:
[0007] A detection system with both rejection and verification functions used in milk powder canning, comprising a detection unit arranged on a gantry, a rejection cylinder arranged downstream of the detection unit, and a control unit electrically connected to the detection unit and the rejection cylinder; the output end of the detection unit is connected to the input end of the control unit, the output end of the control unit is connected to the input end of the rejection cylinder, and the system also comprises a first sensor arranged downstream of the rejection cylinder for detecting the passage of a milk powder can, the first sensor being electrically connected to the control unit.
[0008] As a limitation of the present invention: the control unit includes an electrically connected control box and an industrial computer, and a PLC is arranged inside the control box;
[0009] The detection unit includes a second sensor and a camera;
[0010] The second sensor is a photoelectric sensor. The output end of the second sensor, the output end of the industrial control computer, and the output end of the first sensor are all connected to the PLC input end. The camera input end, the rejection cylinder input end, and the first sensor input end are all connected to the PLC output end; the camera output end is connected to the industrial control computer input end.
[0011] As a further limitation of the present invention: a time delay relay is also provided inside the control box, and the PLC is electrically connected to the time delay relay; the setting time of the time delay relay is equal to the time taken for the milk powder can to be transported from the gantry position to the first sensor.
[0012] As a further limitation of the present invention: the first sensor is also a photoelectric sensor.
[0013] As another limitation of the present invention: a mounting seat is provided between the first sensor and the conveying platform, the first sensor is fixedly mounted on the mounting seat, and the detection end of the first sensor faces the conveying platform.
[0014] As a further limitation of the present invention: the working direction of the rejecting cylinder is perpendicular to the conveying direction of the milk powder can.
[0015] Due to the adoption of the above technical solution, the utility model has the following beneficial effects compared with the prior art:
[0016] The utility model is an improvement on the existing rejection system based on OCR detection. The specific improvement is to add a first sensor, which is a photoelectric sensor, arranged downstream of the rejection cylinder, for detecting whether a milk powder can passes through. The first sensor is electrically connected to the control unit. A delay relay and a PLC are arranged in the control unit. When the detection unit detects a milk powder can without a production batch number, the signal is transmitted to the PLC in the control unit. The PLC will send a rejection signal to the rejection cylinder and the first sensor, and the delay relay is turned on at the same time. For example, if the setting time of the delay relay is 1s, then a milk powder can will be rejected if it passes through the rejection cylinder within 1s. If there are two milk powder cans without batch numbers being transported next to each other, the rejection cylinder will only reject one, and the other milk powder can will continue to be transported forward to the first sensor. However, since the time for the milk powder can to be transported from the gantry position to the first sensor is also 1 second, the time for the other milk powder can to reach the first sensor will not exceed 1 second. At this time, the first sensor will immediately trigger an alarm after detecting the accumulated milk powder cans within 1 second. At the same time, the first sensor will feedback to the PLC, and the PLC will control the transport plate chain to stop running, waiting for manual inspection, and finally manually reject the other milk powder can without batch number. The utility model is equivalent to adding a verification system to prevent the situation where multiple milk powder cans without batch numbers that are transported in a pile are missed, thereby improving the rejection accuracy of milk powder cans without batch numbers.
[0017] In summary, the utility model can improve the accuracy of rejecting milk powder cans without batch numbers, avoiding adverse effects after they flow into the market; the utility model is suitable for the milk powder canning industry or other food, daily chemical and other production industries, and is used to reject problematic products. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] The present invention is described in further detail below in conjunction with the accompanying drawings and specific embodiments.
[0019] Figure 1 This is a schematic diagram of the application structure of an embodiment of the utility model;
[0020] Figure 2 It is a schematic diagram of the application structure of the embodiment of the utility model from another viewing angle;
[0021] Figure 3 This is a schematic diagram of the application structure of the embodiment of the utility model in a state where milk powder cans are piled up;
[0022] Figure 4 It is a schematic block diagram of signal control in an embodiment of the utility model.
[0023] In the figure: 1- conveying platform, 2- gantry, 3- milk powder can, 4- rejecting platform, 5- rejecting cylinder, 6- first sensor, 7- control box, 8- industrial computer, 9- second sensor, 10- camera, 11- mounting base. DETAILED DESCRIPTION
[0024] It should be understood that the detection system with both rejection and verification functions applied to milk powder canning described herein is a preferred embodiment, which is only used to illustrate and explain the utility model and does not constitute a limitation of the utility model.
[0025] The directional terms or positional relationships such as "front" and "rear" described in the embodiments are based on the drawings in the specification of the utility model. Figure 1 The orientation relationship is only for the convenience of describing the present invention and simplifying the description. It does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation on the content protected by the present invention.
[0026] like Figure 1 to Figure 4 As shown, this embodiment includes a detection unit arranged on the gantry 2, a rejection cylinder 5 arranged downstream of the detection unit, and a control unit electrically connected to the detection unit and the rejection cylinder 5; the output end of the detection unit is connected to the input end of the control unit, and the output end of the control unit is connected to the input end of the rejection cylinder 5, and also includes a first sensor 6 arranged downstream of the rejection cylinder 5 for detecting the passage of the milk powder can 3, and the first sensor 6 is electrically connected to the control unit. The first sensor 6 plays a secondary verification function. If the milk powder cans without batch numbers (hereinafter referred to as problematic milk powder cans) are not rejected and transported to the first sensor 6, an alarm will be triggered and fed back to the PLC, and the PLC will control the transport plate chain to stop, and the conveying platform 1 will stop transporting, waiting for the problematic milk powder cans 3 to be manually rejected.
[0027] This embodiment includes two parts: a rejection system and a verification system.
[0028] 1. Rejection system;
[0029] The rejection system comprises a detection unit, a control unit and a rejection cylinder 5;
[0030] like Figure 1-3 As shown, the detection unit includes a second sensor 9 and a camera 10, and the second sensor 9 adopts a photoelectric sensor in the prior art; the control unit includes an electrically connected control box 7 and an industrial computer 8, and the control box 7 is internally provided with an electrically connected PLC and a time delay relay; the detection unit, the control box 7, the PLC, the time delay relay, and the industrial computer 8 are all prior art, and their structures and working principles are not described in detail here.
[0031] The output of the second sensor 9 is connected to the input of the PLC, the output of the PLC is connected to the input of the camera 10, the output of the camera 10 is connected to the input of the industrial computer 8, the output of the industrial computer 8 is connected to the input of the PLC, and the input of the reject cylinder 5 is connected to the output of the PLC. Figure 4 The problematic milk powder can 3 is transported from the back to the front. When it is transported to the bottom of the gantry 2, the second sensor 9 detects the milk powder can 3 passing by and feeds back to the PLC. The PLC controls the camera 10 to take a photo. The camera 10 transmits the photo information to the industrial computer 8. The industrial computer 8 calculates it and sends the calculation result to the PLC. If the calculation result shows that the milk powder can 3 has no batch number, the PLC will send a rejection signal to the rejection cylinder 5, and the cylinder will work to reject the milk powder can 3. In this embodiment, the conveying direction of the milk powder can 3 is from the back to the front, and the working direction of the rejection cylinder 5 is perpendicular to the conveying direction of the milk powder can 3, so that the problematic milk powder can 3 is rejected to the rejection platform 4. Figure 3 The direction of the middle arrow is the moving direction of the milk powder can 3 after entering the rejection platform.
[0032] 1. Verification system;
[0033] If two milk powder cans 3 without batch numbers are transported next to each other, the rejection cylinder 5 will only reject one, and the other milk powder can 3 will be missed, and the problematic milk powder can 3 will eventually flow into the market. For this reason, the first sensor 6 is added, which is equivalent to performing a secondary verification on the milk powder can 3, ensuring that the problematic milk powder can 3 is completely rejected, thereby improving the rejection accuracy.
[0034] The first sensor 6 also adopts the photoelectric sensor of the prior art. The first sensor 6 is arranged downstream of the reject cylinder 5. The downstream mentioned in this embodiment refers to the front position. Here, it means that the first sensor 6 is arranged in front of the reject cylinder 5. In addition, the line connection makes the PLC output end connected to the first sensor 6 input end, and the output end of the first sensor 6 is connected to the PLC input end. Figure 4 The first sensor 6 and the second sensor 9 in this embodiment can also be replaced by any sensor in the prior art except the photoelectric sensor, as long as the position of the milk powder tank 3 can be identified.
[0035] The setting time of the delay relay is equal to the time it takes for the milk powder can 3 to be transported from the gantry 2 to the first sensor 6. In this embodiment, the time it takes for the milk powder can 3 to be transported from the gantry 2 to the time it can be detected by the first sensor 6 is 1s, and the setting time of the delay relay is also 1s. Figure 3 , 4When two adjacent problematic milk powder cans 3 are transported to the gantry 2 together, the second sensor 9 detects that the milk powder cans 3 pass by and feeds back to the PLC. The PLC controls the camera 10 to take photos. The camera 10 transmits the photo information to the industrial computer 8. The industrial computer 8 calculates and sends the result to the PLC. The PLC sends the rejection signal to the rejection cylinder 5 and the first sensor 6 at the same time. At the same time, the delay relay is turned on and the timing starts. The timing time is 1s. The rejection cylinder 5 works and rejects one of the problematic milk powder cans 3 to the rejection platform 4, but the other problematic milk powder can 3 that is missed continues to be transported forward. Within 1s, when the first sensor 6 detects that a milk powder can 3 passes by, an alarm is immediately triggered. At the same time, the first sensor 6 feeds back to the PLC. The PLC will control the transport plate chain to stop running and wait for manual inspection. Finally, the other milk powder can 3 without a batch number can be manually rejected. After the rejection is completed, it is manually reset, the plate chain continues to run, and the milk powder can 3 is transported normally.
[0036] It should be noted that, in general, the time interval between two milk powder cans 3 passing through the gantry 2 is greater than 1 second. In normal transportation, milk powder cans 3 without batch numbers can be rejected. The first sensor 6 is added in this embodiment to address the situation where milk powder cans 3 are piled up due to abnormal transportation. If there are more than one piled milk powder cans 3, and they include problematic milk powder cans 3, then within the set 1 second, a milk powder can 3 will pass through the first sensor 6, which will be judged as inaccurately rejected, and an alarm will be triggered to shut down the machine. After the alarm, the suspected problematic product will stay on the conveying platform. Figure 3 The milk powder tank 3 shown by the middle dotted line is waiting for manual re-inspection. If there is no problem, the operator will reset the alarm and the conveying platform will resume operation.
[0037] In order to improve this embodiment, a mounting seat 11 is arranged between the first sensor 6 and the conveying platform 1. The mounting seat 11 is inverted U-shaped, and the U-shaped opening is arranged close to the conveying platform 1. The first sensor 6 is fixed on the mounting seat 11. The detection end of the first sensor 6 faces the conveying platform 1, and is used to detect the milk powder can 3 on the conveying platform 1.
[0038] It should be noted that the above is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiment, those skilled in the art can still modify the technical solutions recorded in the above embodiment or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.
Claims
1. A detection system with both rejection and verification functions used in canned milk powder, comprising a detection unit arranged on a gantry, a rejection cylinder arranged downstream of the detection unit, and a control unit electrically connected to the detection unit and the rejection cylinder; the output end of the detection unit is connected to the input end of the control unit, and the output end of the control unit is connected to the input end of the rejection cylinder, characterized in that: It also includes a first sensor arranged downstream of the rejecting cylinder and used to detect the passage of the milk powder can, and the first sensor is electrically connected to the control unit.
2. The detection system with both rejection and verification functions used in milk powder canning according to claim 1, characterized in that: The control unit includes an electrically connected control box and an industrial computer, and a PLC is arranged inside the control box; The detection unit includes a second sensor and a camera; The second sensor is a photoelectric sensor. The output end of the second sensor, the output end of the industrial control computer, and the output end of the first sensor are all connected to the PLC input end. The camera input end, the rejection cylinder input end, and the first sensor input end are all connected to the PLC output end; the camera output end is connected to the industrial control computer input end.
3. The detection system with both rejection and verification functions used in canned milk powder according to claim 2, characterized in that: A time delay relay is also provided inside the control box, and the PLC is electrically connected to the time delay relay; the setting time of the time delay relay is equal to the time taken for the milk powder can to be transported from the gantry position to the first sensor.
4. The detection system with both rejection and verification functions used in milk powder canning according to claim 3, characterized in that: The first sensor is also a photoelectric sensor.
5. The detection system with both rejection and verification functions used in milk powder canning according to any one of claims 1 to 4, characterized in that: A mounting seat is arranged between the first sensor and the conveying platform, the first sensor is fixedly mounted on the mounting seat, and the detection end of the first sensor faces the conveying platform.
6. The detection system with both rejection and verification functions used in milk powder canning according to claim 5, characterized in that: The working direction of the reject cylinder is perpendicular to the conveying direction of the milk powder cans.