CN101844633A - Label detection system and detection method thereof - Google Patents

Abstract

The invention relates to a label detection system and a detection method thereof. It can effectively reduce production costs, improve product quality and production speed, and prevent bottles with missing labels from entering the market and affecting corporate image. The system can not only detect the presence of bottle labels on high-speed production lines, but also accurately remove bottles with missing labels. , and effectively prevent the phenomenon of falling bottles. Its structure is as follows: it includes a detection unit, a rejection unit and a rejection confirmation unit arranged sequentially along the bottle flow direction on the production line chain, and a control device is also installed on the side of the production line running chain. The controller in the control device is connected, and the running chain of the production line corresponding to the rejecting unit is also connected with the bottle recovery chain.

Description

Label detection system and detection method thereof

technical field

The invention relates to a label detection system and a detection method capable of testing the presence of labels on high-speed production lines in wine, beverage and other industries.

Background technique

In recent years, my country's wine industry has developed rapidly, and the output of various wines has continued to soar. Along with the increase in output, the requirements for production line speed and product quality have also increased. Not only the quality of wine, but especially the quality of appearance packaging will also have a great impact on product brand and company reputation. With the introduction of foreign filling machines, empty bottle inspection machines, labeling machines, etc., the development of my country's domestic packaging production industry has been driven, and some related problems have also appeared on the production site, such as labeling machine leakage.

In order to solve this problem, domestic manufacturers mainly use foreign labeling machines. Due to the high price and maintenance costs of foreign products, on the one hand, it increases the manufacturer's input cost, and on the other hand, it also limits its promotion and use in small and medium-sized enterprises. Therefore, small and medium-sized enterprises and manufacturers using labeling machines with no label detection function need to arrange special personnel to carry out manual inspection, which is time-consuming and laborious, and has great restrictions on increasing the speed of the production line, and cannot guarantee the quality of ex-factory products. In addition, the efficiency of manual inspection is low, and the inspectors are prone to fatigue, which makes it difficult to ensure the quality of inspection. Especially on high-speed production lines, inspectors cannot conduct a comprehensive and careful inspection of all bottles with a speed of up to 30,000 to 40,000 bottles per hour, resulting in the influx of some bottles with missing labels. The market has affected the corporate image. the

Among the similar patents published in China, the patent number is 01267575.X, but before labeling, the sensor is used to detect whether the length of the label on the label paper roll matches the diameter of the bottle, so as to prevent the label from being attached to the bottle that does not match. The patent No. 01267572.5 is to detect whether there is a missing label on the label paper roll before labeling. They cannot detect whether the label has really been attached to the bottle after the labeling machine is finished, and the latter's The removal device can only transfer a limited number of bottles into the trough, and a special person is required to take care of them and pick them up, and it is easy to cause scratches and wear to the bottles, affecting product quality, and it cannot be used under the condition that the bottles are not poured at all. Rejected to the recycling chain for re-labeling, so the complete automation of the entire recycling process cannot be guaranteed.           

Contents of the invention

The purpose of the present invention is to solve the above problems, to provide a label detection system and its detection method that can effectively reduce production costs, improve product quality and production speed, avoid bottles with missing labels from flowing into the market, and affect corporate image. Detect the existence of bottle labels on the high-speed production line, and can accurately remove the bottles with missing labels, and effectively prevent the bottle from falling down.

In order to achieve the above object, the utility adopts the following technical solutions:

A label detection system, which includes a detection unit, a rejection unit, and a rejection confirmation unit arranged sequentially along the bottle flow direction on a production line chain, and a control device, a detection unit, a rejection unit, and a rejection confirmation unit are also provided on the side of the production line running chain They are all connected with the controller in the control device, and the running chain of the production line corresponding to the rejecting unit is also connected with the bottle recovery chain.

The detection unit includes a positioning sensor, a front label detection sensor, a back label detection sensor and a rotary encoder, which are all connected to the controller, wherein the front label detection sensor and the back label detection sensor are installed on the production line operation chain in a manner facing each other. On the brackets on both sides of the lane, and set the angle downwards, the positioning sensor is also installed on the side of the production line running chain through the bracket; the distance between the positioning sensor, the front label detection sensor, and the back label detection sensor is related to the diameter of a bottle Matching, the rotary encoder is installed on the motor shaft of the production line running chain, wherein the detection sensors are photoelectric sensors or photoelectric image acquisition devices.

The rejection unit is a rejecter, and the rejection confirmation unit is a rejection confirmation sensor, both of which are connected with the controller.

The control device includes a control box, on the front of the control box, there are a text display, a detection start button and a detection stop button, which are connected with the controller in the control box; The lamp is connected with the alarm indicator lamp, wherein the controller is a PLC programmable controller or an industrial computer or a PC, and the text display is a CRT or a liquid crystal display device.

Its detection steps are:

step1: Press the start button, the controller starts detection and initialization;

Step2: First, the bottle triggers the positioning sensor to detect the bottles on the production line in groups, and then the high-speed counter positions the bottle by counting the pulse number of the rotary encoder;

Step3: When the bottle passes the detection sensor, the label detection is carried out, and the detection result is stored in the corresponding storage unit in the storage area of the controller;

Step4: When the bottle reaches the edge of the ejector along the direction of the bottle, the controller judges whether the current bottle is qualified, if it is not qualified, it will be rejected, if it is qualified, it will continue to slide;

Step5: When the bottle passes through the rejection confirmation sensor, it is confirmed whether the unqualified bottle is accurately rejected, and if it is not accurately removed, an alarm will be issued through the alarm indicator.

In the step 5, when there are too many consecutively rejected bottles due to damage to the detection sensor or other reasons, an audible and visual alarm will also be given.

The label detection system of the present invention mainly includes a control box, a detection unit, a rejection unit, a rejection confirmation unit and a human-computer interaction unit, the detection unit includes two detection sensors, a positioning sensor and a rotary encoder, and the rejection unit includes a rejecter , The rejection confirmation unit is composed of a confirmation sensor. In addition, there are controllers, detection running indicator lights, detection stop indicator lights, alarm lights and text displays in the control box. On the production chain, along the direction of bottle flow, there are detection unit, rejection unit and rejection confirmation unit. The control box can be fixed on the side of the production line chain or on the bracket of the detection unit. The rotary encoder is installed on the chain motor shaft. .

The detection process is as follows:

When the bottle flow arrives, use two detection photoelectric switches to detect whether the labels on both sides of the bottle are missing or not, and use the rotary encoder to precisely position the bottle, and collect and store the detection and position information through the controller. When it reaches the position of the ejector, judge the current Whether the bottle is qualified, if it is unqualified, the controller controls the ejector to accurately remove the bottle with the missing label. If the bottle with the missing label is not removed due to mechanical or other reasons, the controller will collect the confirmation photoelectric information and give an alarm through the alarm light. While running the detection, human-computer interaction is performed on the detection process through the text display, parameters can be set, and detection and alarm information can be displayed in real time.

The beneficial effect of the present invention is that it can detect the presence of bottle labels on the high-speed production line, and at the same time accurately remove the bottles with missing labels without pouring the bottles. The hardware is simple, the functions are relatively complete, and the operation is stable and reliable. Reduce production costs and improve the automation level of the production line.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the present invention is further described:

Fig. 1 is a schematic diagram of the system composition of the present invention;

Fig. 2 is a software flowchart of the label detection system;

Fig. 3 is the installation schematic diagram of label detection system embodiment;

In the figure 1. Controller, 2. Detection start button, 3. Detection stop button, 4. Positioning sensor, 5. Front label detection sensor, 6. Back label detection sensor, 7. Reject confirmation sensor, 8. Ejector, 9 . Detection of running indicator light, 10. Detection of stop indicator light, 11. Alarm indicator light, 12. Text display, 13. Bottle recycling chain, 14. Bottle flow direction, 15. Production line running chain, 16. Rotary encoder, 17. Control box.

Detailed ways

In Fig. 1, the detection start button 2, the detection stop button 3, the positioning sensor 4, the front label detection sensor 5, the back label detection sensor 6, the rejection confirmation sensor 7 and the rotary encoder 16 are respectively connected to the input terminals of the controller 1, Ejector 8, detection operation indicator light 9, detection stop indicator light 10 and alarm indicator light 11 are respectively connected to the output end of controller 1, and text display 12 is connected on the communication port of controller 1 by cable. The controller 1 is installed inside the control box 17 , and the text display 12 , the detection start button 2 and the detection stop button 3 are installed outside the control box 17 .

In Fig. 3, the front label detection sensor 5 and the back label detection sensor 6 are facing and installed on both sides of the production line running chain 15, and the distance between the positioning sensor 4 and the front label detection sensor 5 and the back label detection sensor 6 should not be too large , when a bottle has just passed the positioning sensor 4 and is being detected by the front label detection sensor 5 and the back label detection sensor 6, the next adjacent bottle has not triggered the positioning sensor 4 as the criterion. Rotary encoder 16 is installed on the motor rotating shaft, and is used for accurately locating the position of bottle.

In Figure 2, the maximum number of bottles detected by the group is the maximum number of bottles that can be placed between the positioning sensor 4 and the rejection confirmation sensor 7 after the system is installed and fixed. Because there are many bottles on the production line, it is impossible to carry out information on all the bottles. storage, and the detection information of the bottle is only valid between the detection area and the rejection confirmation, so group detection is adopted. When the system is running, it takes a certain distance to reach the rejecting position after the detection of the front mark and the back mark. How to accurately locate is the key to realize accurate rejection. The encoder and the conveyor belt rotate synchronously, which can reflect the relative distance of the conveyor belt movement, and the system is installed and fixed. After the wine bottle is fixed from the start to the distance between the rejection, the pulse counted by the rotary encoder 16 installed on the chain motor shaft is fixed, so by counting the output pulses of the rotary encoder 16, accurate positioning and rejection can be realized. Therefore, combined with the rotary encoder 16, the bottles on the production line are grouped to detect, store and reject. When the number of detected bottles reaches the maximum number of detected bottles in the group, the system restarts counting from zero.

First, the front label detection sensor 5 and the back label detection sensor 6 are set so that the output signals are opposite when it detects whether the bottle has a label, that is, the learning process of the detection sensor. As shown in Figure 2, after the system is powered on, press the detection start button 2, the controller 1 starts detection and initialization, and the detection operation indicator light 9 is on. The bottle first triggers the positioning sensor 4 along the bottle flow direction 14, and uses the group detection counter to count the bottles entering the detection area, that is, to number them. If the group detection counter counts to the maximum value, it will be cleared, and the subsequent Bottle counting number, otherwise start the high-speed counter to count the pulse number of the rotary encoder 16, read the position information of the bottle, that is, the pulse number, according to the counting direction, use the number of the bottle to add or subtract the positioning sensor to the rejecter 8 The pulse number corresponding to the distance is stored to the storage unit corresponding to the position storage area, so as to accurately locate it. When passing through the front label detection sensor 5 and the back label detection sensor 6, the positive label and the back label are detected sequentially, and the corresponding detection information storage unit of the controller 1 is set by the serial number of the bottle set in front. Continuously read the count of the pulse number of the rotary encoder and compare it with the stored position information to see if the current bottle has reached the position of the ejector 8. When the bottle reaches the edge of the ejector 8 along the direction of the bottle, the bottle is counted by the internal counter The counting number reads the corresponding detection information stored in the front, and the controller 1 judges whether the current bottle is qualified (both the positive label and the back label exist as qualified, otherwise it is unqualified). Sliding, after it is rejected to the adjacent bottle recovery chainway 13, the rejector is withdrawn, and the bottle confirms whether the unqualified bottle is accurately rejected when the bottle passes through the removal confirmation sensor 7. When the detection sensor is damaged or other reasons cause too many bottles to be rejected continuously, an audible and visual alarm will also be given.

The text display 12 can be used for human-computer interaction with the controller 1, and the detection statistical results such as the total number of detected bottles and the total number of unqualified bottles can be displayed in real time, and parameters such as the distance pulse number of the rejecter and the maximum number of continuously rejected bottles can be set for the controller. View alarm information and acknowledge alarms.

The above-mentioned controller can adopt various microprocessors such as various PLC programmable controllers, industrial computers, PCs, etc., and the above-mentioned text display can also use other display devices such as CRT and liquid crystal.

The above-mentioned front label detection sensor (5) and back label detection sensor (6) can use photoelectric sensors or other optical image acquisition and processing devices, wherein the optical image acquisition device includes various industrial cameras and photoelectric conversion devices, and also includes lenses and light sources , the device collects and processes the image of the bottle and sends the result to the controller (1) to judge whether it is qualified or not.

Claims (6)

1. label detection system, it is characterized in that, it is included in detecting unit, the rejecting unit that produces upper edge, linear chain road bottle flow path direction and set gradually and rejects confirmation unit, side also is provided with control setup in manufacturing line operation chain road, detecting unit, reject the unit and reject confirmation unit and all is connected, move the chain road with the corresponding manufacturing line in rejecting unit and also be connected with bottle recovery chain road with controller in the control setup.

2. label detection system as claimed in claim 1, it is characterized in that, described detecting unit comprises alignment sensor, front label checking sensor, back label detecting sensor and rotary encoder, they all are connected with controller, wherein front label checking sensor and back label detecting sensor with each other over against mode be installed on the support of manufacturing line operation both sides, chain road, and downward-sloping set angle, alignment sensor also are installed in manufacturing line operation chain road one side by support; Distance between alignment sensor and front label checking sensor, the back label detecting sensor is complementary with the diameter of a bottle, rotary encoder is installed on the manufacturing line operation chain road motor shaft, and wherein said each detecting sensor adopts opto-electronic pickup or photoelectric image harvester.

3. label detection system as claimed in claim 1 is characterized in that, described rejecting unit is a flush trimmer, and described rejecting confirmation unit is confirmed sensor for rejecting, and they all are connected with controller.

4. as claim 1 or 2 or 3 described label detection systems, it is characterized in that described control setup comprises control box, be provided with text display in the control box front, detect start button and detect stop button that they are connected with the interior controller of control box; Simultaneously, controller also stops indicator lamp and is connected with warning indicator lamp with detection run indicator, detection respectively, and wherein said controller is PLC Programmable Logic Controller or industrial computer or PC, and described text display is CRT or liquid crystal indicator.

5. a method of inspection that adopts the described label detection system of claim 1 is characterized in that, its step is:

Step1: press start button, controller start detection and initialization;

Step2: bottle triggered location sensor at first, the bottle on the manufacturing line is divided into groups to detect, high-speed counter positions bottle by the pulse count of counting rotary encoder device then;

Step3: when bottle process detecting sensor, carry out label and detect, and the storage testing result is to the corresponding stored unit of controller memory space;

Step4: when bottle arrives flush trimmer when bottle comes the edge of direction, controller judges whether current bottle is qualified, if nonconformity then with its rejecting, slides as if qualified then the continuation;

Step5: when bottle is confirmed sensor through rejecting, confirm whether inferior-quality bottle accurately rejects, then do not report to the police by warning indicator lamp if accurately reject.

6. the method for inspection of label detection system as claimed in claim 5 is characterized in that, in described step5, when because detecting sensor is damaged or other reasons when causing continuous rejectings bottle too much, also can carry out sound and light alarm.

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