Laser drilling hole number detection method, detection system and terminal

Abstract

The invention provides a laser drilling hole number detection method, a detection system and a terminal, relates to the technical field of drilling detection, and solves the problem that the real-time detection of the laser drilling hole number of all cigarette filter tips by cigarette making machine equipment in the production process cannot be realized through spot check. According to the main technical scheme, optical signals generated when the surface of a target object is burnt by laser are collected, and the number of laser holes in the target object is determined based on signal data corresponding to the optical signals. The purposes of reducing the influence on data acquisition caused by the phenomenon that laser does not burn the surface of the cigarette or repeatedly perforate and the like during laser perforation and further improving the accuracy of signal data acquisition so as to improve the accuracy of determining the perforation number are achieved. And processing the collected feature data to obtain the punching number of the target object. The purposes that the punching number of each punched target object is determined, and the laser punching number of all cigarette filter tips is detected in real time in the production process of cigarette making machine equipment are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of punching detection, and more specifically, to a method for detecting the number of laser punches, a detection system, and a terminal. Background Art

[0002] On-line laser punching of cigarette rods is a new technology developed in the tobacco industry. On-line laser punching of cigarette rods is an economical, fast, and effective means to reduce the tar content of cigarettes. It is a process in which, during the tipping process of cigarette rods, high-energy lasers are used to punch through the tipping paper in the middle of the cigarette filter rod to form tiny holes. When the cigarette is smoked, it dilutes the smoke, thereby reducing the tar content and minimizing the adverse effects on the human body and the environment.

[0003] According to the ventilation requirements, smoking experience, process implementation requirements of different cigarette rods, and the impact of fluctuations in the physical indicators of medium and slender cigarette rods, it is necessary to set different distances from the near-mouth end of the tipping paper laser punch, punching hole diameters, punching numbers, and hole row spacings, etc.

[0004] Currently, most inspections of the laser punching of cigarette rods are carried out by manually sampling several cigarettes at irregular intervals and observing them with the aid of a 40-fold portable microscope (without scale). Although the number of laser punches can be accurately detected, manual visual inspection is a sampling inspection and cannot achieve real-time detection of the number of laser punches on the filter tips of all cigarette rods during the production process of the cigarette making machine. Summary of the Invention

[0005] The purpose of the present invention is to provide a method for detecting the number of laser punches, a detection system, and a terminal, so as to achieve the purpose of real-time detection of the number of laser punches on the filter tips of all cigarette rods.

[0006] The present invention is achieved through the following technical solutions:

[0007] In a first aspect, a method for detecting the number of laser punches is provided, including the following operations:

[0008] After receiving a punching instruction, the optical signal generated when the laser burns an object and the position information of the laser burning the object are collected in real time;

[0009] Based on the position information of the laser burning the object, it is determined whether the optical signal burns on the target object;

[0010] If so, characteristic data corresponding to the optical signal is generated;

[0011] The characteristic data is processed to obtain the number of punches on the target object.

[0012] When the surface of the cigarette is burned by laser, a bright flame will be generated. When a bright flame is generated on the surface of the cigarette by laser burning, the optical signal of the flame is collected in real time through devices such as optical sensors or cameras to capture each flame signal during the laser drilling process. It can be judged whether the laser drilling device of the cigarette making machine drills holes on the surface of the cigarette. By collecting the optical signal of the flame and generating characteristic data, the number of drilled holes can be accurately reflected, so as to avoid inaccurate data caused by laser deviation, repeated drilling and other situations.

[0013] Optionally, the characteristic data includes the time period of signal acquisition and the signal data acquired during this time period.

[0014] Optionally, the process of processing the characteristic data includes:

[0015] Obtain the drilling duration of the sub-target object in the target object and the time interval of data acquisition between adjacent sub-target objects;

[0016] Based on the drilling duration and the time interval, perform segmentation processing on the time period to obtain time segments;

[0017] Perform statistical processing on the signal data within the time segment to obtain the number of drilled holes of the sub-target object corresponding to this time segment.

[0018] In the actual production process, the laser drilling device of the cigarette making machine may need to drill holes in a number of cigarettes in sequence. Therefore, the time period from the start of drilling the first cigarette to the completion of drilling the last cigarette by the laser drilling device of the cigarette making machine is recorded as the time period of signal acquisition. At the same time, after collecting an optical signal, a signal data is generated correspondingly. Finally, the characteristic data during the drilling process of these several cigarettes is formed. This characteristic data includes the time period of signal acquisition of these several cigarettes and the signal data acquired during this time period. Through this structure, the purpose of continuously collecting and detecting the number of drilled holes on each cigarette during the continuous production process of cigarette drilling is achieved.

[0019] Optionally, the process of obtaining the drilling duration of the sub-target object in the target object includes:

[0020] Obtain the perimeter of the sub-target object, the rotation speed of the sub-target object and the number of turns of the sub-target rotation;

[0021] Perform calculation processing on the perimeter of the sub-target object, the rotation speed of the sub-target object and the number of turns of the sub-target rotation to obtain the drilling duration of the sub-target object.

[0022] Optionally, the process of obtaining the time interval of data acquisition between adjacent sub-target objects includes:

[0023] Obtain the rotation speed of the punching wheel and the arc length between two adjacent cigarette grooves on the punching wheel;

[0024] Perform calculation processing on the rotation speed of the punching wheel and the arc length between two adjacent cigarette grooves on the punching wheel to obtain the time interval for data collection between adjacent sub-target objects.

[0025] Optionally, when receiving a punching signal, initialize the time of signal collection and collect signal data.

[0026] By generating a punching signal when the cigarette enters the processing area, the punching time point can be accurately controlled to ensure that each cigarette is laser-punched at the correct position and time. At the same time, by real-time monitoring and recording the signal data during the punching process, problems can be detected and solved in a timely manner, improving the punching efficiency.

[0027] In a second aspect, a detection system is provided for a laser punching hole number detection method as described in the first aspect, including:

[0028] An acquisition module for, after receiving a punching instruction, real-time collecting the optical signal generated when the laser burns an object and the position information of the object burned by the laser;

[0029] A judgment module for judging whether the optical signal burns on the target object through the position information of the object burned by the laser;

[0030] A generation module for generating characteristic data corresponding to the optical signal when the optical signal burns on the target object;

[0031] A processing module for processing the characteristic data to obtain the number of punches on the target object.

[0032] In a third aspect, a terminal is provided, including:

[0033] A processor;

[0034] A memory for storing instructions executable by the processor;

[0035] Wherein, the processor is configured to call the instructions stored in the memory to execute a laser punching hole number detection method as described in the first aspect.

[0036] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0037] 1. Collect the optical signals generated when the surface of the target object is laser-burned, and determine the number of laser holes punched on the target object based on the signal data corresponding to the optical signals. This aims to reduce the impact on data collection caused by phenomena such as the laser not burning the surface of the cigarette rod or repeated punching during laser hole punching, thereby improving the accuracy of signal data collection and the accuracy of determining the number of punched holes.

[0038] 2. Process the characteristic data collected during the hole punching process to obtain the number of holes punched on the target object. It is possible to determine the number of holes punched on each target object that has been punched, solving the problem that sampling inspection cannot achieve real-time detection of the number of laser holes punched on all cigarette filter tips during the production process of cigarette-making equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts. In the drawings:

[0040] Figure 1 It is a schematic flowchart of a method for detecting the number of laser holes in Embodiment 1;

[0041] Figure 2 It is a schematic electrical block diagram of a detection system in Embodiment 2. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0042] To make the objectives, technical solutions, and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in combination with the embodiments and the drawings. The illustrative embodiments and descriptions thereof of the present invention are only used to explain the present invention and are not intended to limit the present invention.

[0043] Embodiment 1

[0044] On-line laser hole punching of cigarette rods is a new technology developed in the tobacco industry. On-line laser hole punching of cigarette rods is an economical, fast, and effective means to reduce the tar content of cigarettes.

[0045] The existing laser punching device of the cigarette making machine mainly includes a cigarette wheel, a punching wheel and a beam splitter. The punching wheel is provided with a cigarette slot, and the punching wheel is arranged on the lower side of the cigarette wheel, and the beam splitter is arranged in front of the cigarette wheel. After placing the cigarette in the cigarette slot on the punching wheel, the punching wheel rotates to transport the cigarette in the cigarette slot to the processing area of the beam splitter. After the punching wheel transports the cigarette to the processing area of the beam splitter, the beam splitter performs laser punching on the cigarette. After punching a hole in the cigarette (the laser punching time is short and can be ignored), the cigarette wheel moves the cigarette in the cigarette slot to rotate. At this time, the beam splitter punches a hole in the cigarette. Repeat several times until the holes are punched on the circumference of the cigarette. At this time, the punching wheel rotates to transport the cigarette in the next cigarette slot to the processing area of the beam splitter.

[0046] After the cigarettes are punched, the number of holes punched in the cigarettes needs to be checked.

[0047] At present, most people use the method of manually sampling a few cigarettes at irregular intervals and observing them with the help of a 40x portable microscope (without scale) to check the laser holes in cigarettes. Although it can accurately detect the number of laser holes, manual visual inspection is a random inspection and cannot achieve real-time detection of the number of laser holes in all cigarette filters during the production process of the cigarette making machine.

[0048] Therefore, this embodiment provides a method for detecting the number of laser-drilled holes. Figure 1 As shown, the following operations are included:

[0049] S1. After receiving the drilling instruction, the light signal generated when the laser burns the object and the position information of the laser burning object are collected in real time;

[0050] In order to improve the accuracy of signal data acquisition, the accuracy of determining the number of holes punched is improved.

[0051] During the specific implementation process, when using the laser punching device of the cigarette making machine to punch holes in cigarettes, each time a hole needs to be punched on the cigarette, the controller will generate a punching instruction. The laser punching device of the cigarette making machine receives the punching instruction and starts to emit laser. When the laser burns the surface of an object, a bright flame is generated. Therefore, the light signal of the flame is collected in real time by optical sensors or cameras and other devices to capture each flame signal during the laser punching process. In this way, the purpose of judging whether the laser punching device of the cigarette making machine has punched a hole on the surface of the object is achieved by whether the light signal is collected.

[0052] At the same time, in order to improve the real-time performance of data collection, when the laser punching device of the cigarette making machine receives the punching instruction, the light signal generated when the laser burns the object and the position information of the laser burning the object are synchronously collected.

[0053] S2. Determine whether the optical signal burns on the target object by the position information of the object burned by the laser;

[0054] S3. If so, generate characteristic data corresponding to the optical signal;

[0055] S4. Process the characteristic data to obtain the number of holes punched in the target object.

[0056] To improve the accuracy of determining the number of holes punched. After acquiring the position information of the object burned by the laser and the optical signal generated when the object is burned by the laser, determine whether the position of the object burned by the laser falls on the target object. And only after the position of the object burned by the laser falls on the target object, generate the characteristic data corresponding to the optical signal.

[0057] In the specific implementation process, when using the laser drilling device of a cigarette making machine to punch holes in a cigarette rod, when the laser irradiates the object, a burning mark will be generated on the surface of the object. This mark is captured by a visual device such as a camera, and then the image is processed using computer vision technology to determine the position information of the burning mark. Then, compare the position information of the laser burn with the position of the cigarette rod. If the position of the laser burn matches the position of the cigarette rod, it can be determined that the optical signal has burned on the cigarette rod. Once it is determined that the optical signal has burned on the cigarette rod, the characteristic data corresponding to the optical signal can be generated.

[0058] By collecting the optical signal of the flame and generating characteristic data, the number of holes punched can be accurately reflected, avoiding inaccurate data caused by situations such as laser deviation and repeated punching. This method can greatly improve the accuracy of determining the number of holes punched and meet the precise control requirements in the production process.

[0059] At the same time, process the collected characteristic data to obtain the number of holes punched in the target object. To achieve the purpose of determining the number of holes punched in each target object that has been punched and real-time detection of the number of laser holes punched in all cigarette rod filters during the production process of the cigarette making machine equipment.

[0060] During the continuous production process of punching holes in cigarette rods, continuously perform the above signal acquisition, and through continuous signal data recording, the number of holes punched on each cigarette rod can be detected in real time.

[0061] Among them, the characteristic data includes the time period of signal acquisition and the signal data acquired during this time period;

[0062] In the specific implementation process, when a bright flame is generated on the surface of the cigarette by laser burning, the optical signal of the flame is collected, and after the optical signal is collected, signal data is generated. In the actual production process, the laser drilling device of the cigarette machine may need to drill a number of cigarettes in sequence. Therefore, the time period from the start of drilling the first cigarette to the completion of drilling the last cigarette by the laser drilling device of the cigarette machine is recorded as the time period for signal collection. At the same time, after an optical signal is collected, a corresponding signal data is generated. Finally, the characteristic data during the drilling process of the number of cigarettes is formed, and the characteristic data includes the time period for signal collection of the number of cigarettes and the signal data collected during this time period. Through this structure, the purpose of continuously collecting and detecting the number of holes drilled on each cigarette during the continuous production process of cigarette drilling is achieved.

[0063] In the present embodiment S4, the process of processing the characteristic data includes:

[0064] S41. Obtain the drilling duration of the sub-target object in the target object and the time interval for data collection between adjacent sub-target objects;

[0065] In step S41, the process of obtaining the drilling duration of the sub-target object in the target object includes:

[0066] S4101. Obtain the perimeter of the sub-target object, the rotation speed of the sub-target object, and the number of rotations of the sub-target, specifically:

[0067] In the continuous production process, the target object includes a number of sub-target objects. It can be understood that a sub-target object is a cigarette. Among them, the perimeter of the sub-target object is the perimeter of the cigarette.

[0068] S4102. Perform calculation processing on the perimeter of the sub-target object, the rotation speed of the sub-target object, and the number of rotations of the sub-target to obtain the drilling duration of the sub-target object (ignoring the laser drilling time).

[0069] Specifically, the formula (1) for the calculation processing of the perimeter of the sub-target object, the rotation speed of the sub-target object, and the number of rotations of the sub-target is:

[0070]

[0071] Among them, T1 is the drilling duration of the sub-target object; C1 is the perimeter of the sub-target object; V1 is the rotation speed of the sub-target object; N is the number of rotations of the sub-target.

[0072] In step S41, the process of obtaining the time interval for data collection between adjacent sub-target objects includes:

[0073] S4111. Obtain the rotational speed of the punching wheel and the arc length between two adjacent cigarette slots on the punching wheel;

[0074] S4112. Perform calculation processing on the rotational speed of the punching wheel and the arc length between two adjacent cigarette slots on the punching wheel to obtain the time interval for data collection between adjacent sub-target objects.

[0075] Specifically, for the rotational speed of the punching wheel and the arc length between two adjacent cigarette slots on the punching wheel, the calculation formula (2) is:

[0076]

[0077] Wherein, T2 is the time interval for data collection between adjacent sub-target objects; C2 is the arc length between two adjacent cigarette slots on the punching wheel; V2 is the rotational speed of the punching wheel.

[0078] S42. Based on the punching duration and the time interval, perform segmentation processing on the time period to obtain time segments;

[0079] Specifically, according to the punching duration T1 of the sub-target object and the time interval T2 for data collection between adjacent sub-target objects, the time interval T from the start of punching of the sub-target object to the start of punching of the next sub-target object can be obtained. According to the time interval T from the start of punching of the sub-target object to the start of punching of the next sub-target object, the time period for signal collection is split into time segments corresponding to the number of processed cigarettes. At this time, one cigarette corresponds to one time segment, and the signal data within this one time segment corresponds to the punching situation on this one cigarette.

[0080] Wherein, the signal data can be a high-level data (low-level data) generated each time an optical signal is collected; the signal data can also be a value generated each time an optical signal is collected.

[0081] S43. Perform statistical processing on the signal data within the time segment to obtain the punching quantity of the sub-target object corresponding to this time segment.

[0082] Specifically, count the number of high levels / values within the time segment to obtain the punching quantity on the sub-target object (cigarette) corresponding to this time segment.

[0083] Before step S1 in this embodiment, it further includes initializing the signal collection time and collecting signal data when a punching signal is received.

[0084] Specifically, when it is detected that the punching wheel transports the first cigarette to the processing area of the beam splitter, a punching signal is generated. This signal can be an electrical signal, an optical signal, or other forms of signals, and is used to trigger subsequent punching operations.

[0085] While generating the punching signal, the system initializes the time for signal acquisition. This time can be an accurate timer or a timestamp obtained by other means.

[0086] Starting from the initialized signal acquisition time, signal data is collected. This signal data can be various parameters or status information related to the laser punching process, such as laser power, punching time, flame intensity, etc. At the same time, the beam splitter performs laser punching on the cigarette rod.

[0087] By generating a punching signal when the cigarette rod enters the processing area, the punching time point can be accurately controlled to ensure that each cigarette rod is laser punched at the correct position and time. By real-time monitoring and recording the signal data during the punching process, problems can be detected and solved in a timely manner, improving the punching efficiency.

[0088] A laser punching hole number detection method provided by this embodiment has at least the following advantages:

[0089] 1. By collecting the optical signal of the flame and generating characteristic data, it can accurately reflect the number of punches, avoiding inaccurate data caused by laser deviation, repeated punching, etc. This method can greatly improve the accuracy of determining the number of punches and meet the precise control requirements in the production process.

[0090] 2. It can monitor the number of punches in real time during the actual production process, detect and adjust problems in a timely manner, and ensure the stability of the production process and the consistency of product quality.

[0091] 3. It does not require complex hardware equipment or high-precision sensors, and the cost is relatively low.

[0092] 4. This method collects the optical signal and generates characteristic data, then processes the characteristic data to calculate the number of punches, which is easy to implement.

[0093] 5. The characteristic data includes the time period of signal acquisition and the signal data collected during this time period, which can be used for subsequent data recording and analysis. By analyzing these data, the punching process and process control can be further optimized to improve product quality and production efficiency.

[0094] 6. This method is not only applicable to laser punching, but also can be applied to other punching processes that generate optical signals. Therefore, it has a wide range of adaptability.

[0095] Embodiment 2

[0096] This embodiment provides a detection system, as Figure 2 shown, for implementing a laser punching hole number detection method described in Embodiment 1, including a collection module, a judgment module, a generation module, and a processing module.

[0097] Among them, the acquisition module is used to, after receiving the punching instruction, collect in real time the optical signal generated when the object is laser-burned and the position information of the object being laser-burned.

[0098] The judgment module is used to judge whether the optical signal is burned on the target object by the position information of the object being laser-burned.

[0099] The generation module is used to generate characteristic data corresponding to the optical signal when the optical signal is burned on the target object.

[0100] The processing module is used to process the characteristic data to obtain the number of punches on the target object.

[0101] In this embodiment, the detection system further includes a first acquisition module, a second acquisition module, a separation module, and a statistics module.

[0102] The first acquisition module is used to acquire the punching duration of the sub-target object in the target object.

[0103] The second acquisition module is used to acquire the time interval between data acquisitions of adjacent sub-target objects.

[0104] The separation module is used to perform segmentation processing on the time period based on the punching duration and the time interval to obtain time segments.

[0105] The statistics module is used to perform statistical processing on the signal data within the time segment to obtain the number of punches on the sub-target object corresponding to the time segment.

[0106] The first acquisition module includes a first acquisition unit, a second acquisition unit, a third acquisition unit, and a first processing unit.

[0107] The first acquisition unit is used to acquire the perimeter of the sub-target object.

[0108] The second acquisition unit is used to acquire the rotation speed of the sub-target object.

[0109] The third acquisition unit is used to acquire the number of rotations of the sub-target.

[0110] The first processing unit is used to perform calculation processing on the perimeter of the sub-target object, the rotation speed of the sub-target object, and the number of rotations of the sub-target to obtain the punching duration of the sub-target object.

[0111] The second acquisition module includes a fourth acquisition unit, a fifth acquisition unit, and a second processing unit.

[0112] The fourth acquisition unit is used to acquire the rotation speed of the punching wheel.

[0113] The fifth acquisition unit is used to acquire the arc length between two adjacent cigarette grooves on the punching wheel.

[0114] A second processing unit, configured to calculate and process the rotation speed of the punching wheel and the arc length between two adjacent cigarette slots on the punching wheel, so as to obtain the time interval for data acquisition between adjacent sub-target objects.

[0115] Embodiment 3

[0116] This embodiment provides a terminal, including: a processor and a memory, where the memory is used to store instructions executable by the processor; wherein, the processor is configured to call the instructions stored in the memory to execute a method for detecting the number of laser punching holes as described in the first aspect.

[0117] The specific embodiments described above further elaborate on the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only the specific embodiments of the present invention and is not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for detecting the number of laser-drilled holes, characterized in that, Including the following operations: After receiving the punching instruction, real-time collect the optical signal generated when the laser burns the object and the position information of the laser burning the object; Based on the position information of the laser burning the object, determine whether the optical signal burns on the target object; If so, generate characteristic data corresponding to the optical signal; Process the characteristic data to obtain the number of punches on the target object.

2. The method for detecting the number of laser punching holes according to claim 1, characterized in that: The characteristic data includes the time period of signal acquisition and the signal data acquired during this time period.

3. The method for detecting the number of laser drilling holes according to claim 2, wherein The process of processing the characteristic data includes: Obtain the punching duration of the sub-target object in the target object and the time interval of data acquisition between adjacent sub-target objects; Based on the punching duration and the time interval, perform segmentation processing on the time period to obtain time segments; Perform statistical processing on the signal data within the time segment to obtain the number of punches on the sub-target object corresponding to this time segment.

4. The laser drilling hole number detection method according to claim 3, wherein The process of obtaining the punching duration of the sub-target object in the target object includes: Obtain the perimeter of the sub-target object, the rotation speed of the sub-target object, and the number of turns of the sub-target rotation; Perform calculation processing on the perimeter of the sub-target object, the rotation speed of the sub-target object, and the number of turns of the sub-target rotation to obtain the punching duration of the sub-target object.

5. A method for detecting the number of laser drilling holes according to claim 3, characterized in that, The process of obtaining the time interval of data acquisition between adjacent sub-target objects includes: Obtain the rotation speed of the punching wheel and the arc length between two adjacent cigarette grooves on the punching wheel; Perform calculation processing on the rotation speed of the punching wheel and the arc length between two adjacent cigarette grooves on the punching wheel to obtain the time interval of data acquisition between adjacent sub-target objects.

6. The method for detecting the number of laser punching holes according to claim 2, characterized in that When receiving the punching signal, initialize the time of signal acquisition and collect signal data.

7. A detection system, characterized in that, For a method for detecting the number of laser punching holes as described in any one of claims 1-6, including: An acquisition module, configured to, after receiving the punching instruction, real-time collect the optical signal generated when the laser burns the object and the position information of the laser burning the object; A judgment module, configured to determine whether the optical signal burns on the target object based on the position information of the laser burning the object; A generation module, configured to generate characteristic data corresponding to the optical signal when the optical signal burns on the target object; A processing module, configured to process the characteristic data to obtain the number of punches on the target object.

8. A terminal, characterized in that, Including: A processor; A memory, the memory is used to store instructions executable by the processor; Wherein, the processor is configured to call the instructions stored in the memory to execute a method for detecting the number of laser punching holes as described in any one of claims 1-6.

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