Cigarette carton packet missing detection device and cigarette carton conveyor

Abstract

The invention relates to the technical field of automation of tobacco packaging machinery, and provides a cigarette carton packet missing detection device and a cigarette carton conveyor. The cigarette packet missing detection device comprises at least two detection units, a synchronous annunciator, a data processing unit and an alarm unit. The detection units are arranged on the upper side and the lower side of the cigarette carton conveying assembly, the cigarette carton conveying assembly is used for conveying cigarette cartons, and the detection units are used for detecting whether cigarette packets in the cigarette cartons are missing or not; the synchronous annunciator is arranged on at least one side of the cigarette carton conveying assembly and used for detecting whether the cigarette carton is in place or not; the data processing unit is electrically connected with the detection unit and the synchronous annunciator, and the data processing unit is used for controlling the detection unit and the synchronous annunciator to work; the alarm unit is electrically connected with the data processing unit. According to the invention, the defects of large false detection and missing detection risks of a cigarette packet missing detection device in a tobacco packaging machine in the prior art are overcome, the probability of false detection and missing detection of cigarette packet missing is reduced, and the product quality is further improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of tobacco packaging machine automation, and particularly relates to a cigarette bundle missing detection device and a cigarette bundle conveyor. BACKGROUND

[0002] During the operation of a tobacco packaging machine, there may be a situation of cigarette bundle missing. Therefore, in order to reduce the probability of such a situation, a cigarette bundle missing detection device is generally arranged on the tobacco packaging machine for detection. Existing packaging machines include a self-provided cigarette bundle missing detection device and a subsequently added negative pressure cigarette bundle missing detection device.

[0003] However, the self-provided cigarette bundle missing detection device of the packaging machine only arranges a detection unit at the upper part of the cigarette bundle, and no detection unit is arranged at the lower part of the cigarette bundle. Therefore, when the upper cigarette bundle is suspended due to the compression of the box skin of the cigarette bundle box, the lower cigarette bundle missing will not be detected, thus causing the occurrence of false detection and missed detection.

[0004] Whether the detector of the subsequently added negative pressure cigarette bundle missing detection device can work normally is closely related to the time when the cigarette bundle enters the detection area and the time when the detection starts and ends. If the cigarette bundle enters the detection area in advance or lags behind, false detection and missed detection will also occur, thus increasing the risk of cigarette bundle missing. In addition, the accuracy of negative pressure missing detection is also affected by air pressure fluctuation and air hole blockage.

[0005] In order to reduce the probability of false detection and missed detection of the cigarette bundle missing of the tobacco packaging machine, it is necessary to design a new type of cigarette bundle missing detection device. SUMMARY

[0006] The present application provides a cigarette bundle missing detection device and a cigarette bundle conveyor to solve the system design defect of false detection and missed detection of the tobacco packaging machine in the cigarette bundle missing detection process in the prior art. The present application reduces the probability of false detection and missed detection of the cigarette bundle missing, and thus improves the product quality of the tobacco packaging machine.

[0007] The present application provides a cigarette bundle missing detection device, comprising: at least two detection units arranged on the upper and lower sides of a cigarette bundle conveying assembly, the detection units being used to detect whether the cigarette bundle inside the cigarette bundle is missing; a synchronization signaler arranged on at least one side of the cigarette bundle conveying assembly, the synchronization signaler being used to detect whether the cigarette bundle is in place; a data processing unit electrically connected with the detection units and the synchronization signaler, the data processing unit being used to control the detection units and the synchronization signaler to work; an alarm unit electrically connected with the data processing unit, the alarm unit being used to alarm in the case of missing cigarette bundle.

[0008] According to the cigarette bundle detection device provided by the application, the detection unit comprises a first mounting frame and a plurality of detectors, the plurality of detectors are arranged at intervals on the first mounting frame, and the detectors are arranged one by one in correspondence with the cigarette bundles.

[0009] According to the cigarette bundle detection device provided by the application, the detector comprises a capacitive sensor.

[0010] According to the cigarette bundle detection device provided by the application, the synchronization signaler comprises a non-contact photoelectric sensor.

[0011] According to the cigarette bundle detection device provided by the application, the alarm unit comprises at least one of a buzzer and a sound-light alarm.

[0012] According to the cigarette bundle detection device provided by the application, the distance from the synchronization signaler to the cigarette bundle is less than the distance from the detector on the same side to the cigarette bundle.

[0013] According to the cigarette bundle detection device provided by the application, the middle part of the first mounting frame is provided with a detection hole, and the detector penetrates through the detection hole.

[0014] According to the cigarette bundle detection device provided by the application, the first mounting frame is detachably provided with a second mounting frame, and the synchronization signaler is detachably arranged on the second mounting frame.

[0015] The application further provides a cigarette bundle conveyor comprising the cigarette bundle detection device and the cigarette bundle conveying assembly.

[0016] According to the cigarette bundle conveyor provided by the application, the cigarette bundle conveying assembly comprises a first conveying belt and a second conveying belt, a gap is arranged between the first conveying belt and the second conveying belt, and the cigarette bundle detection device is arranged on the upper side and the lower side of the gap.

[0017] The cigarette bundle detection device provided by the application is provided with a synchronization signaler, which can detect whether the cigarette bundle is in place first, and only when it is detected that the cigarette bundle is in place, the detection unit can detect whether the cigarette bundle is missing. Such an arrangement can avoid the false detection and missed detection caused by the fact that the cigarette bundle enters the detection area in advance or lags behind in the prior art, thereby greatly improving the quality of the product. In addition, the detection unit is arranged on the upper side and the lower side of the cigarette bundle conveying assembly, so that the cigarette bundles on the upper layer and the lower layer in the cigarette bundle can be detected, and the accuracy of the detection result is greatly improved.

[0018] The cigarette strip conveyor provided by the application comprises a cigarette strip missing packet detection device, which has the function of simultaneously detecting upper and lower cigarette packets and avoids the system design defects of false detection and missed detection caused by air pressure fluctuation and air hole blockage of negative pressure missing packet detection. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the application or prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0020] Figure 1 Fig. 1 is a structural schematic diagram of the cigarette strip missing packet detection device provided by the application; Figure 2 Fig. 2 is a structural schematic diagram of a first mounting frame of the cigarette strip missing packet detection device provided by the application; Figure 3 Fig. 3 is a front view of a second mounting frame of the cigarette strip missing packet detection device provided by the application; Figure 4 Fig. 4 is a side view of the second mounting frame of the cigarette strip missing packet detection device provided by the application; Figure 5 Fig. 5 is a structural schematic diagram of a cigarette strip conveying assembly of the cigarette strip missing packet detection device provided by the application.

[0021] Fig. 6 is a structural schematic diagram of the cigarette strip missing packet detection device provided by the application. 100: detection unit; 110: first mounting frame; 111: detection hole; 112: first mounting hole; 113: first connecting hole; 120: detector; 200: synchronous signaler; 300: data processing unit; 400: alarm unit; 500: cigarette strip; 510: cigarette packet; 600: cigarette strip conveying assembly; 610: first conveying belt; 620: second conveying belt; 700: second mounting frame; 710: second mounting hole; 720: second connecting hole. DETAILED DESCRIPTION

[0022] In order to make the objects, technical solutions and advantages of the present application clearer, the following will be combined with the accompanying drawings for the purpose of making the technical solutions in the present application clearer, complete and more comprehensible. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0023] The structure and working principle of the present application will be described below. Figures 1-5 The structure and working principle of the present application will be described below.

[0024] With reference to Figure 1 The present application provides a cigarette carton missing detection device, which comprises at least two detection units 100, a synchronous signaler 200, a data processing unit 300 and an alarm unit 400. The detection unit 100 is arranged on the upper and lower sides of a cigarette strip conveying assembly 600, the cigarette strip conveying assembly 600 is used for conveying a cigarette strip 500, and the detection unit 100 is used for detecting whether the cigarette cartons 510 inside the cigarette strip 500 are missing. The synchronous signaler 200 is arranged on at least one side of the cigarette strip conveying assembly 600, and is used for detecting whether the cigarette strip 500 is in place. The data processing unit 300 is electrically connected with the detection unit 100 and the synchronous signaler 200, and is used for controlling the detection unit 100 and the synchronous signaler 200 to work. The alarm unit 400 is electrically connected with the data processing unit 300, and gives an alarm in the case of missing cigarette cartons 510. It can be understood that the synchronous signaler 200 can be arranged above or below the cigarette strip conveying assembly 600. When there is only one synchronous signaler 200, it is preferably arranged above the conveying assembly 600.

[0025] In the above structure, when the cigarette strip 500 is conveyed to a detection area by the cigarette strip conveying assembly 600, the synchronous signaler 200 detects whether it reaches a predetermined position. Once the cigarette strip 500 is in place, the synchronous signaler 200 sends a signal to the data processing unit 300, indicating that the cigarette strip is ready for detection. After receiving the signal sent by the synchronous signaler 200, the data processing unit 300 controls the detection unit 100 to start the detection process. Since the detection unit 100 is arranged on the upper and lower sides of the cigarette strip conveying assembly 600, it can detect whether the cigarette cartons 510 in the upper and lower layers inside the cigarette strip are missing. If the detection unit 100 finds any missing cigarette cartons 510, it will feed back the information to the data processing unit 300. After analyzing the data received from the detection unit 100, the data processing unit 300 confirms that there is missing cigarette cartons, and triggers the alarm unit 400 to give an alarm, notifying the relevant personnel to take corresponding measures.

[0026] The present application sets up a synchronous signaler 200, which can first detect whether the cigarette rod 500 is in place. Only when the cigarette rod 500 is in place, the detection unit 100 will detect whether the cigarette packet 510 is missing. This setting can avoid the false detection and missed detection caused by the cigarette packet entering the detection area in advance or lagging behind in the prior art, greatly improving the quality of the product. Secondly, the present application sets detection units 100 on the upper and lower sides of the cigarette rod conveying assembly 600. This setting can detect the cigarette packets 510 in the upper and lower layers inside the cigarette rod 500, greatly improving the accuracy of the detection results.

[0027] In some possible embodiments, to further improve the performance and application range of the cigarette rod missing packet detection device, the data processing unit 300 can integrate more advanced data analysis algorithms to improve the accuracy of detection. By learning from historical data, the system can identify different types of defect patterns, thereby reducing the false alarm rate. The synchronous signaler 200 is arranged on at least one side of the cigarette rod conveying assembly 600, for monitoring whether the cigarette rod 500 reaches the predetermined position, and sending a signal to the data processing unit 300, to ensure that the detection unit 100 will only start the detection process when the cigarette rod 500 is completely in place. In order to enhance the real-time monitoring capability of the system, the operator can connect to the central control system through the network to realize remote viewing and management of the production line state and detection results. Once a problem is found, not only an alarm is immediately sent, but also the production parameters can be automatically adjusted or the production line can be paused to prevent the problem from being enlarged. In addition, in order to further reduce the risk of missed detection, after the preliminary detection, the system can perform secondary review on the suspected defective cigarette rod, and use higher-precision sensors or different detection technologies for detailed inspection. This multi-level detection mechanism ensures higher detection accuracy and reliability.

[0028] In order to facilitate the operator to carry out daily maintenance and troubleshooting, the system can be provided with a user-friendly interface, providing functions such as fault diagnosis guide and operation manual. These functions help users quickly locate problems and take corresponding measures to optimize the operation process. At the same time, the system is designed with good compatibility and scalability, making it easy to integrate with other production equipment or management systems. Through standardized interfaces and modular design, users can add new functional modules as needed, such as linkage with other quality control systems, or upload data to the cloud for big data analysis. This not only improves the functions and efficiency of the existing system, but also provides the possibility for future technical upgrading and functional expansion, so that the cigarette rod missing packet detection device can play a role in more scenarios and meet the changing market demand. Through the close cooperation between the components, the whole system ensures an efficient and reliable work flow.

[0029] Reference Figure 1In some embodiments of the present application, the detection unit 100 comprises a first mounting frame 110 and a plurality of detectors 120, which are spaced apart on the first mounting frame 110, and each detector 120 corresponds to a cigarette packet 510.

[0030] In the above structure, the one-to-one correspondence between the detectors 120 and the cigarette packets 510 not only improves the detection accuracy, but also simplifies the data analysis process of the data processing unit 300. Each detector 120 detects the cigarette packet 510 at a specific position and directly feeds back the result to the data processing unit 300. If a certain cigarette packet 510 is missing, the corresponding detector 120 will immediately send a signal to the data processing unit 300 to trigger the alarm unit 400 to alarm. This way makes the system response more rapid and accurate, reduces unnecessary delay and error.

[0031] In addition, the design of the detection unit 100 allows the number and position of the detectors 120 to be adjusted according to different cigarette specifications, to adapt to cigarette packets 510 of different sizes and arrangements. This flexibility enables the system to maintain efficient detection capability when the production line changes, ensuring high-quality control even under different production conditions.

[0032] In some possible embodiments, in order to further improve the accuracy of detection, the detection unit 100 can increase the automatic calibration function. This function enables the detector 120 to self-calibrate before each detection, ensuring that it is in the best working condition. This self-calibration mechanism can be realized through built-in standard reference or software algorithm, so as to ensure the consistency and reliability of the detection result. At the same time, the detection unit 100 can be provided with a data storage module for recording the results and related parameters of each detection. These data not only help the operator to diagnose and maintain faults, but also can be uploaded to the central control system for big data analysis, in order to monitor the production quality and optimize the production process in the long term.

[0033] In addition, in cooperation with the synchronization signaler 200, the detection unit 100 can further optimize the signal transmission and processing mechanism to ensure that the detector 120 will start the detection process only when the cigarette 500 is completely in place. This precise time control mechanism reduces the false detection or missed detection caused by the cigarette stack entering the detection area in advance or lagging behind, improving the stability and reliability of the entire system.

[0034] With this arrangement, the detection unit 100 not only achieves accurate detection of the cigarette packets 510, but also has higher flexibility and adaptability. The system can be adjusted according to different production needs to ensure efficient quality control under various conditions. Overall, these extensions not only enhance the functionality and efficiency of the existing system, but also provide the possibility for future technical upgrades and functional expansions, enabling the cigarette strip missing packet detection device to play a role in more scenarios and meet changing market demands. The close cooperation between various components ensures that the overall system workflow is more efficient and reliable.

[0035] In some embodiments of the present application, the detector 120 includes a capacitive sensor.

[0036] In the above structure, the detector 120 uses a capacitive sensor, which determines the presence or characteristics of a target object by detecting changes in capacitance. The working principle of a capacitive sensor is based on changes in the electric field. When an object approaches the sensing area of the sensor, it will cause a change in the capacitance value, which can be accurately measured and converted into an electrical signal for processing.

[0037] Because capacitive sensors are very sensitive to changes in medium, they can accurately detect the presence and integrity of the cigarette packets 510. For example, during the detection process, if a cigarette packet 510 is missing or has a defect, the sensor will detect a change in the capacitance value and transmit this information to the data processing unit 300. This way not only improves the accuracy of detection, but also effectively avoids wear and tear or other mechanical failures caused by physical contact, extending the service life of the equipment.

[0038] In addition, capacitive sensors have fast response characteristics and can complete the detection process in a very short time, which is particularly important for high-speed production lines. The sensor can detect without directly contacting the cigarette packets 510, reducing the risk of damage to the product surface and also reducing maintenance costs and downtime.

[0039] Capacitive sensors also have good anti-interference ability and can work stably in complex industrial environments. Even if there is electromagnetic interference or other environmental factors around, the sensor can still provide reliable detection results. This allows the system to maintain efficient and stable operation under various production conditions.

[0040] In terms of cooperation with the synchronization signaler 200, the capacitive sensor can start the detection process after the cigarette strip 500 is completely in place based on the signal provided by the synchronization signaler 200. This precise timing control mechanism reduces false positives or false negatives caused by the cigarette pile entering the detection area too early or late, improving the stability and reliability of the entire system.

[0041] In some possible embodiments, to further improve the reliability of the system, the capacitive sensor can be provided with an automatic calibration function. This self-calibration mechanism ensures that the sensor is in the best working state before each detection, thereby ensuring the consistency and reliability of the detection results. Through the built-in standard reference or software algorithm, the system can automatically adjust to adapt to different environmental conditions and production needs.

[0042] Of course, the detector 120 can also be other types of detectors. Specifically, the following sensors can be used as alternatives: ① Optical sensor: An optical sensor can detect the presence or absence of an object and its characteristics by emitting a light beam and receiving the reflected light. When the cigarette packet 510 passes through the detection area, the optical sensor can determine whether the cigarette packet 510 exists or has defects according to whether the light beam is blocked or reflected back. This sensor has high precision and fast response, and is suitable for high-speed production lines.

[0043] ② Ultrasonic sensor: An ultrasonic sensor measures distance and detects the presence of an object by emitting ultrasonic waves and receiving the reflected sound waves. When the cigarette packet 510 passes through the detection area, the ultrasonic sensor can determine whether the cigarette packet 510 exists or has defects according to the received echo signal. This sensor is not affected by light conditions and can work stably in harsh environments.

[0044] ③ X-ray sensor: An X-ray sensor generates images by using the ability of X-rays to penetrate objects, thereby detecting internal structures and integrity. For the detection of the cigarette packet 510, the X-ray sensor can be used to check whether there are defects or other abnormalities inside. Although this sensor has a high cost, it provides very high detection accuracy and reliability, and is particularly suitable for occasions with extremely high detection requirements.

[0045] In some embodiments of the present application, the synchronization signaler 200 is a non-contact photoelectric sensor. Specifically, the synchronization signaler 200 is a Keyence FU-6F diffuse reflection photoelectric switch. The diffuse reflection photoelectric switch integrates the transmitter and receiver, has the characteristics of small size, simple and convenient installation, fast response, strong anti-interference, and high reliability. Specifically, since the cigarette rod is wrapped in a transparent paper and the surface is bright, when the cigarette rod passes, the reflection plate formed by the transparent paper of the carton and the carton can reflect a sufficient amount of light, thereby meeting the use environment of the photoelectric switch.

[0046] In some embodiments of the present application, the alarm unit 400 includes at least one of a buzzer and a sound-light alarm.

[0047] The alarm unit 400 includes at least one of a buzzer and a sound-light alarm, which ensures that an alarm can be issued in a timely manner when a missing or other abnormal condition of a cigarette packet 510 is detected. When the data processing unit 300 confirms that a certain cigarette packet 510 is missing or defective, it triggers the alarm unit 400 to issue an alarm. By using a buzzer, the system can issue a sound signal at the first time to remind the on-site operator to pay attention and take corresponding measures. This sound alarm has directness and immediacy, and can penetrate the background noise in a noisy production environment to ensure that the staff can quickly receive the information.

[0048] At the same time, if the alarm unit 400 is equipped with a sound-light alarm, not only a sound signal will be issued, but also the alarm effect will be further enhanced through the flashing of the light. This dual alarm mechanism improves the visibility and recognition of the alarm, especially in low light or long distance observation, the visual signal can be an effective supplement to the sound signal, ensuring that the operator can pay attention to the alarm information in time no matter where he is.

[0049] It should be noted that the design of the alarm unit 400 can be adjusted according to specific needs. For example, in some scenarios, using only a buzzer may be sufficient; while in other cases, in order to ensure higher alertness and response speed, a buzzer and a sound-light alarm can be used simultaneously. This flexibility allows the system to be optimized according to different working environments and requirements, ensuring that alarm information can be effectively conveyed in any situation.

[0050] In some specific embodiments, the alarm unit 400 can use an LTE-1101 type warning light. This type of warning light is made of shock-resistant incandescent bulbs and high-quality resin shells, uses internationally advanced turbine structure and scientific parabolic reflector design, has the advantages of long light propagation distance, no dead point, loud alarm sound, etc., and is suitable for harsh working environments such as smoke and noise.

[0051] Referring to Figure 1 In some embodiments of the present application, the distance from the synchronization signaler 200 to the cigarette rod 500 is less than the distance from the detector 120 on the same side to the cigarette rod 500.

[0052] By setting the synchronization signaler 200 closer to the cigarette rod 500 than the detector 120, the system can confirm the position of the cigarette rod 500 earlier and more accurately, and provide an accurate time reference for subsequent detection. This design not only improves the accuracy and reliability of detection, but also optimizes the response speed and working efficiency of the system, ensuring efficient and stable operation in complex and variable production environments. The close cooperation between the various components ensures that the entire system workflow is more efficient and reliable.

[0053] Referring to Figure 1In some embodiments of the present application, the middle part of the first mounting frame 110 is provided with a detection hole 111, and the detector 120 penetrates through the detection hole 111. Both ends of the detection hole 111 are provided with a first mounting hole 112 for mounting the first mounting frame 110. The upper and lower sides of the detection hole 111 are provided with a first connecting hole 113.

[0054] In the above structure, the detection hole 111 provides a clear path for the detector 120 to accurately align with the position of the cigarette packet 510. Since the detector 120 penetrates through the detection hole 111, its sensing area can directly contact or approach the cigarette packet 510, thereby improving the accuracy and reliability of detection. This design ensures that the detector 120 can work at the optimal position, avoiding detection errors caused by external interference or other factors.

[0055] In addition, the design of the detection hole 111 also helps to fix the position of the detector 120, keeping it stable throughout the detection process. This not only helps to improve the consistency of detection, but also reduces the fluctuation of detection results caused by the change of the position of the detector 120. A stable detection environment is crucial to ensure the accuracy of the detection results, especially on high-speed production lines, where any slight change can affect the final detection effect.

[0056] Furthermore, the design of the detection hole 111 also facilitates maintenance and adjustment. If it is necessary to replace or calibrate the detector 120, the operator can conveniently operate through the detection hole 111 without the need to disassemble the entire first mounting frame 110. This convenience not only improves the maintenance efficiency, but also reduces downtime, improving the overall operation efficiency of the production line.

[0057] Referring to Figure 1 In some embodiments of the present application, the first mounting frame 110 is detachably provided with a second mounting frame 700, and the synchronous signaler 200 is detachably arranged on the second mounting frame 700. Specifically, the second mounting frame 700 is Z-shaped. The second mounting frame 700 is provided with a second mounting hole 710 and a second connecting hole 720, the second mounting hole 710 is used for mounting the synchronous signaler 200, and the second connecting hole 720 is correspondingly arranged with the first connecting hole 113, and the two are connected through bolts.

[0058] The present application also provides a conveying scheme for detecting a cigarette rod in a cigarette rod conveyor, which comprises a cigarette rod missing packet detection device according to any one of the above embodiments and a cigarette rod conveying assembly 600. The cigarette rod conveyor is arranged at the end of a tobacco packaging machine to further detect and convey the packaged cigarette rod.

[0059] Referring to Figure 5In some embodiments of the present application, the cigarette strip conveying assembly 600 comprises a first conveying belt 610 and a second conveying belt 620, and a gap is arranged between the first conveying belt 610 and the second conveying belt 620, and the cigarette strip missing package detection device is arranged on the upper and lower sides of the gap. The main function of the gap is to provide space for the detection of the synchronous signal device 200 and the detector 120, and facilitate the transmission of the detection signal.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not limited thereto; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A device for detecting missing packs of cigarette packs, characterized in that, include: At least two detection units (100) are provided on the upper and lower sides of the cigarette pack (600), and the detection units (100) are used to detect whether the cigarette pack (510) inside the cigarette pack (500) is missing; A synchronization signal (200) is disposed on at least one side of the cigarette stick conveying assembly (600), and the synchronization signal (200) is used to detect whether the cigarette stick (500) is in position; A data processing unit (300) is electrically connected to the detection unit (100) and the synchronization signal device (200), and the data processing unit (300) is used to control the operation of the detection unit (100) and the synchronization signal device (200); An alarm unit (400) is electrically connected to the data processing unit (300) and sounds an alarm when the cigarette pack (510) is missing.

2. The cigarette pack missing detection device according to claim 1, characterized in that, The detection unit (100) includes a first mounting frame (110) and a plurality of detectors (120). The plurality of detectors (120) are spaced apart on the first mounting frame (110), and the detectors (120) are arranged in a one-to-one correspondence with the cigarette pack (510).

3. The cigarette pack missing detection device according to claim 2, characterized in that, The detector (120) includes a capacitive sensor.

4. The cigarette pack missing detection device according to claim 1, characterized in that, The synchronization signal device (200) includes a non-contact photoelectric sensor.

5. The cigarette pack missing detection device according to any one of claims 1-4, characterized in that, The alarm unit (400) includes at least one of a buzzer and an audible and visual alarm.

6. The cigarette pack missing detection device according to claim 2, characterized in that, The distance from the sync signal (200) to the cigarette bar (500) is less than the distance from the detector (120) on the same side to the cigarette bar (500).

7. The cigarette pack missing detection device according to claim 6, characterized in that, The first mounting bracket (110) has a detection hole (111) in the middle, and the detector (120) passes through the detection hole (111).

8. The cigarette pack missing detection device according to claim 7, characterized in that, The first mounting bracket (110) is detachably provided with a second mounting bracket (700), and the synchronization signal device (200) is detachably provided on the second mounting bracket (700).

9. A cigarette bar conveyor, characterized in that, Includes the cigarette pack missing detection device as described in any one of claims 1-8 and the cigarette pack conveying assembly (600).

10. The cigarette bar conveyor according to claim 9, characterized in that, The cigarette pack conveying assembly (600) includes a first conveyor belt (610) and a second conveyor belt (620), with a gap between the first conveyor belt (610) and the second conveyor belt (620), and the cigarette pack missing detection device is located on the upper and lower sides of the gap.

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