Detection control system for cutting position of large product to be cut

Abstract

The present application provides a detection control system for the cutting position of a large product to be cut. The detection control system for the cutting position of a large product to be cut comprises: horizontal pan / tilt heads; an image acquisition module comprising industrial cameras, light sources and supports, wherein the supports are arranged on the horizontal pan / tilt heads, both the industrial cameras and the light sources are movably connected to the supports, and the supports include arc-shaped supports; a side guide driving module comprising a side guide, a stepper motor and a position sensor, wherein the stepper motor being used for adjusting the side guide, and the position sensor is used for feeding back the size of the side guide adjusted by the stepper motor; and an information processing module used for acquiring an image acquired by an image acquisition module, obtaining a deviation value between a cutting line of the image and a template on the basis of the image, and controlling, on the basis of the deviation value, the stepper motor to adjust the side guide. According to the present application, the deviation size of the side gauge can be more accurately and directly measured, improving the cutting quality of products, and reducing manual involvement.

Description

Detection and control system for cutting position of large-sheet cut products Technical Field

[0001] The present application relates to the technical field of cutting position detection of cut products, and in particular to a detection and control system for the cutting position of large-sheet cut products. Background Art

[0002] During the automated cutting of large sheets of securities, absolute product alignment is crucial to maintain the desired appearance and dimensions. Initially, the cutting process lacked any detection mechanism. Once the product reached the cutting position, the side gauges tapped and aligned it. Once aligned, the cutter blades began cutting. This method presented significant risks. If the product's alignment shifted significantly, the side gauges failed to effectively correct it, resulting in scrapped product.

[0003] With the upgrade of detection technology, after the side gauge is tapped, four cameras installed directly above the product will check the posture of the product sheet. If the verification is within the error range, the cutting action can be started. However, this detection method has defects. When the product sheet is misaligned with the product below, the quality of the product below cannot be effectively guaranteed after cutting.

[0004] During the large-sheet cutting process, because printed materials are not produced on the same press, the positioning references for each stack of products vary. Therefore, during cutting, each stack must be verified to ensure that the cutting line coincides with the actual cutting position. If the deviation is too large, the machine must be stopped and two people must work together to adjust the side gauges. Because the gauge edge is on the non-operating side, both cutting positions must be considered, so two people must work together. During the side gauge adjustment process, both operators are required to communicate and adjust the side gauge size. However, due to different understandings of the gauge size, there may be information gaps during communication, resulting in errors in the adjustment size.

[0005] Summary of the Invention

[0006] This application aims to solve at least one of the above technical problems.

[0007] To this end, the first object of the present application is to provide a detection and control system for the cutting position of large-sheet cut products.

[0008] In order to achieve the first purpose of the present application, the technical solution of the first aspect of the present application provides a detection and control system for the cutting position of large-sheet cut products, including: a horizontal pan-tilt platform; an image acquisition module, including an industrial camera, a light source and a bracket, the bracket is arranged on the horizontal pan-tilt platform, the industrial camera and the light source are movably connected to the bracket, and the bracket includes an arc-shaped bracket; a side gauge drive module, arranged on one side of the horizontal pan-tilt platform, the side gauge drive module includes a side gauge, a stepper motor and a position sensor, the stepper motor is connected to the side gauge for adjusting the side gauge, and the position sensor is connected to the stepper motor for feedback of the stepper motor to adjust the size of the side gauge; an information processing module, respectively connected to the image acquisition module and the side gauge drive module, the information processing module is used to obtain the image captured by the image acquisition module, and obtain the deviation value between the cutting line of the image and the template based on the image, and control the stepper motor to adjust the side gauge according to the deviation value.

[0009] In this technical solution, the cutting position detection and control system for large-scale cut products includes a horizontal pan-tilt stage, an image acquisition module, a side gauge drive module, and an information processing module. The image acquisition module includes an industrial camera, a light source, and a bracket. The camera bracket is mounted on the horizontal pan-tilt stage, expanding the capture range and accommodating all types of large-scale products, ensuring the optimal capture position. The industrial camera and light source are flexibly connected to the curved bracket, allowing for adjustment of the camera's shooting angle. Adjusting the camera's position eliminates the need to adjust its focal length, saving adjustment time. The side gauge drive module includes a side gauge, a stepper motor, and a position sensor. The stepper motor adjusts the side gauge. After the stepper motor is adjusted, a high-precision position sensor mounted on the side provides feedback to the stepper motor, adjusting the side gauge's dimensions, achieving closed-loop control. Using a stepper motor to adjust the side gauge's dimensions enables real-time, automatic adjustment. After the image acquisition module completes its image acquisition task, the information processing module obtains the image captured by the image acquisition module, compares the cutting line on the image with the template, and determines the deviation between the cutting line and the template. This deviation is then used to control the stepper motor to adjust the corresponding side gauge parameters. After the adjustment is completed, it is compared with the change value of the position sensor to ensure the accuracy of the motor adjustment parameters. The stepper motor adjustment accuracy can reach 0.02mm, which greatly improves the side gauge adjustment accuracy. The technical solution of this application can more accurately and directly measure the deviation size of the side gauge, thereby improving the cutting quality of the product. By using an arc-shaped camera bracket, there is no need to adjust the focal length when adjusting the position of the industrial camera, and the data usage requirements are met. When adjusting the side gauge parameters using a stepper motor, when adjusting the side gauge size, manual intervention can be used, or a fully automatic method can be used, which is simple and fast, can reduce the use of manpower, greatly improve work efficiency, and reduce the side gauge adjustment downtime.

[0010] In addition, the technical solution provided by this application may also have the following additional technical features:

[0011] In the above technical solution, optionally, the arc-shaped bracket is a 45° arc-shaped bracket with the lower blade of the cutting knife as the center and the distance from the cutting knife to the center line of the horizontal pan-tilt head as the radius.

[0012] In this technical solution, the arc bracket is a 45° arc bracket with the lower blade of the cutting knife as the center of the circle and the distance from the cutting knife to the center line of the horizontal pan-tilt head as the radius. When adjusting the position of the industrial camera, there is no need to adjust the focal length of the industrial camera, saving adjustment time.

[0013] In the above technical solution, optionally, the horizontal pan-tilt platform includes a first horizontal pan-tilt platform and a second horizontal pan-tilt platform, and the first horizontal pan-tilt platform and the second horizontal pan-tilt platform are arranged at intervals.

[0014] In this technical solution, the horizontal platform includes a first horizontal platform and a second horizontal platform, and the first horizontal platform and the second horizontal platform are arranged at intervals.

[0015] In the above technical solution, optionally, the arc-shaped bracket includes a first arc-shaped bracket and a second arc-shaped bracket, the first arc-shaped bracket is connected to the first horizontal pan-tilt head, and the second arc-shaped bracket is connected to the second horizontal pan-tilt head.

[0016] In this technical solution, the arc-shaped bracket includes a first arc-shaped bracket and a second arc-shaped bracket, the first arc-shaped bracket is connected to the first horizontal pan-tilt head, and the second arc-shaped bracket is connected to the second horizontal pan-tilt head.

[0017] In the above technical solution, optionally, the industrial camera includes a front cutting line camera and a rear cutting line camera, the front cutting line camera is movably connected to the first arc-shaped bracket, and the rear cutting line camera is movably connected to the second arc-shaped bracket.

[0018] In this technical solution, the industrial camera includes a front cutting line camera and a rear cutting line camera. The front cutting line camera is movably connected to the first arc-shaped bracket, and the rear cutting line camera is movably connected to the second arc-shaped bracket.

[0019] In the above technical solution, optionally, the light source includes a first light source and a second light source, the first light source is connected to the front-end cutting line camera, and the second light source is connected to the rear-end cutting line camera.

[0020] In this technical solution, the light source includes a first light source and a second light source, the first light source is connected to the front-end cutting line camera, and the second light source is connected to the rear-end cutting line camera.

[0021] In the above technical solution, optionally, the information processing module includes a computer, which is connected to the industrial camera and is used to obtain images captured by the industrial camera and calculate the deviation value between the cutting line of the image and the template based on the image.

[0022] In this technical solution, the information processing module includes a computer, which is connected to the industrial camera and is used to obtain images captured by the industrial camera and calculate the deviation value between the cutting line of the image and the template based on the image.

[0023] In the above technical solution, optionally, the information processing module further includes a PLC, which is connected to the computer and the stepper motor respectively, and is used to control the stepper motor to adjust the corresponding parameters of the side gauge according to the deviation value.

[0024] In this technical solution, the information processing module also includes a PLC, which is connected to the computer and the stepper motor respectively, and is used to control the stepper motor to adjust the corresponding parameters of the side gauge according to the deviation value.

[0025] In the above technical solution, optionally, the detection and control system for the cutting position of large-sheet cut products further includes: an alarm device connected to the information processing module, which is used to issue an alarm when the deviation value is greater than a preset value.

[0026] In this technical solution, the cutting position detection and control system for large-scale cut products also includes an alarm device, connected to the information processing module, that generates an alarm when the deviation exceeds a preset value. This device eliminates the previous situation of wasted cuts and ensures product cutting quality.

[0027] In the above technical solution, optionally, the PLC is also connected to an alarm device, and is used to control the alarm device to alarm when the deviation value is greater than a preset value.

[0028] In this technical solution, the PLC is also connected to an alarm device, and is used to control the alarm device to alarm when the deviation value is greater than a preset value.

[0029] In the above technical solution, optionally, the alarm device includes an alarm light.

[0030] In this technical solution, the alarm device may be an alarm light.

[0031] Additional aspects and advantages of the present application will become apparent in the following description or may be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0033] FIG1 is a schematic diagram of the three-dimensional structure of a detection and control system for cutting positions of large-sized cut products according to one embodiment of the present application;

[0034] FIG2 is a schematic diagram of electrical control of a detection and control system for a cutting position of a large-size cut product according to an embodiment of the present application;

[0035] FIG3 is a flowchart of the side gauge adjustment process of the detection and control system for the cutting position of large-sheet cut products according to one embodiment of the present application;

[0036] FIG4 is a schematic diagram of the AB knife light edge station crown and image acquisition camera of a detection and control system for the cutting position of large-sheet cut products according to one embodiment of the present application.

[0037] The correspondence between the reference numerals and component names in FIG1 is as follows: 10: detection and control system for cutting position of large-sheet cut products; 110: horizontal pan-tilt head; 120: industrial camera; 130: arc bracket; 140: stepping motor. DETAILED DESCRIPTION

[0038] In order to more clearly understand the above-mentioned objects, features and advantages of the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other in the absence of conflict.

[0039] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present application is not limited to the specific embodiments disclosed below.

[0040] The following describes a detection and control system for cutting positions of large-sheet cut products according to some embodiments of the present application with reference to FIG. 1 to FIG. 4 .

[0041] As shown in Figures 1 and 2, an embodiment of the first aspect of the present application provides a detection and control system 10 for the cutting position of large-scale cut products, including: a horizontal pan-tilt platform 110; an image acquisition module, including an industrial camera 120, a light source and a bracket, the bracket is arranged on the horizontal pan-tilt platform 110, the industrial camera 120 and the light source are movably connected to the bracket, and the bracket includes an arc bracket 130; a side gauge drive module, provided on one side of the horizontal pan-tilt platform 110, the side gauge drive module includes a side gauge, a stepper motor 140 and a position sensor, the stepper motor 140 is connected to the side gauge for adjusting the side gauge, and the position sensor is connected to the stepper motor 140 for feedback of the stepper motor 140 adjusting the size of the side gauge; an information processing module, respectively connected to the image acquisition module and the side gauge drive module, the information processing module is used to obtain the image captured by the image acquisition module, and obtain the deviation value between the cutting line of the image and the template based on the image, and control the stepper motor 140 to adjust the side gauge according to the deviation value; an alarm device, connected to the information processing module, for alarming when the deviation value is greater than a preset value.

[0042] In this embodiment, the detection and control system 10 for the cutting position of large-scale cut products includes a horizontal pan-tilt platform 110, an image acquisition module, a side gauge drive module, and an information processing module. Among them, the image acquisition module includes an industrial camera 120, a light source, and a bracket. The camera bracket is installed on the horizontal pan-tilt platform 110, which can expand the shooting range, take into account all varieties of large-scale products that need to be captured, and ensure the best shooting position. The industrial camera 120 and the light source are movably connected to the arc bracket 130 to adjust the camera's shooting angle. When adjusting the position of the industrial camera 120, it is not necessary to adjust the focal length of the industrial camera 120, saving adjustment time. The side gauge drive module includes a side gauge, a stepper motor 140, and a position sensor. The stepper motor 140 is used to adjust the side gauge. After the stepper motor 140 is adjusted, the high-precision position sensor installed on one side provides feedback to the stepper motor 140 to adjust the size of the side gauge, so that closed-loop control is achieved in the program. The use of a stepper motor 140 to drive the adjustment of the side gauge size can realize real-time automatic adjustment of the side gauge size. After the image acquisition module completes the image acquisition task, the information processing module obtains the image captured by the image acquisition module, compares the cutting line on the image with the template, and obtains the deviation value between the cutting line of the image and the template. The stepper motor 140 is controlled according to the deviation value to adjust the corresponding parameters of the side gauge. After the adjustment is completed, it is compared with the change value of the position sensor to ensure the accuracy of the motor adjustment parameters. The adjustment accuracy of the stepper motor 140 can reach 0.02mm, which greatly improves the side gauge adjustment accuracy. The alarm device is used to alarm when the deviation value is greater than the preset value, eliminating the previous situation of one-cut waste and ensuring the cutting quality of the product. This embodiment can more accurately and directly measure the deviation size of the side gauge, thereby improving the cutting quality of the product. By using an arc-shaped camera bracket, there is no need to adjust the focal length when adjusting the position of the industrial camera 120, and the data usage requirements are met. The stepper motor 140 is used to drive the side gauge parameter adjustment. When adjusting the side gauge size, manual intervention or a fully automatic method can be used. This is simple and fast, can reduce the use of manpower, greatly improve work efficiency, and reduce the downtime of side gauge adjustment.

[0043] In the above embodiment, optionally, the arc-shaped bracket 130 is a 45° arc-shaped bracket with the lower blade of the cutting knife as the center of the circle and the distance from the cutting knife to the center line of the horizontal pan-tilt head 110 as the radius. When adjusting the position of the industrial camera 120, there is no need to adjust the focal length of the industrial camera 120, saving adjustment time.

[0044] In the above embodiment, optionally, the horizontal platform 110 includes a first horizontal platform 110 and a second horizontal platform 110 , and the first horizontal platform 110 and the second horizontal platform 110 are arranged at intervals.

[0045] In the above embodiment, optionally, the arc-shaped bracket 130 includes a first arc-shaped bracket 130 and a second arc-shaped bracket 130 , the first arc-shaped bracket 130 is connected to the first horizontal pan-tilt platform 110 , and the second arc-shaped bracket 130 is connected to the second horizontal pan-tilt platform 110 .

[0046] In the above embodiment, optionally, the industrial camera 120 includes a front cutting line camera and a rear cutting line camera, the front cutting line camera is movably connected to the first arc bracket 130, and the rear cutting line camera is movably connected to the second arc bracket 130.

[0047] In the above embodiment, optionally, the light source includes a first light source and a second light source, the first light source is connected to the front-end cutting line camera, and the second light source is connected to the rear-end cutting line camera.

[0048] In the above embodiment, the information processing module optionally includes a computer connected to the industrial camera 120 and configured to acquire images captured by the industrial camera 120 and calculate, based on the images, the deviation between the image's cutting line and the template. The information processing module also includes a programmable logic controller (PLC), which is connected to the computer and the stepper motor 140 and configured to control the stepper motor 140 to adjust corresponding parameters of the side gauge based on the deviation. The PLC is also connected to an alarm device and configured to control the alarm device to sound an alarm when the deviation exceeds a preset value.

[0049] In the above embodiment, optionally, the alarm device may be an alarm light.

[0050] As shown in Figures 1, 2, 3, and 4, a large-sheet cutting position detection and control system 10, according to a specific embodiment of the present application, addresses the problem of measuring product position, paper collection and separation, and skew during the large-sheet cutting process of securities, collecting serial number information, and providing alarms and deviation values ​​when anomalies occur. The system comprises advanced technologies such as an industrial camera 120, PLC control technology, and a stepper motor 140 drive technology.

[0051] The existing early warning system for large-sheet cutting processes installs two cameras between a set of knife boxes at the edge-lighting station to capture two marking points in the center of the product to determine the positional deviation of the product. During the printing process, different pressures from the printing press cause the product to shrink and separate. When the pressure from the printing press is too high, the product will be compressed and deformed, causing the product format to expand. At this time, the calibration deviations of the four detection points near the center are within the deviation range, but the cutting accuracy requirements near the cutting line of the product edge cannot be guaranteed. Therefore, our technology uses two industrial cameras 120 to capture the position of the cutting line of the edge of large-sheet products and determine whether the first product is misaligned. Only two cameras are left in the middle of the product, one camera to capture the serial number of the product, and the other camera to capture the deviation of the marker. At this time, several cameras align a cutting surface to prevent the product from skewing.

[0052] The image acquisition module consists of an industrial camera 120, a light source, and a bracket. Structurally, this image acquisition module captures the front and rear trim lines of large products. However, to accommodate all product types, the trim line positions vary. To ensure optimal shooting position, the camera bracket is mounted on a horizontal gimbal 110, expanding the capture range. To adjust the camera's shooting angle, a 45° arc is constructed with the bottom edge of the cutter as the center and the distance from the cutter to the gimbal's centerline as the radius. This eliminates the need to adjust the camera's focus when adjusting the camera's position, saving time.

[0053] When adjusting the side gauge size, the original adjustment method required the operator to rotate the adjustment handle on the operating side, with a dial indicator fixed above the handle to monitor the side gauge adjustment value in real time. We have improved the side gauge adjustment method by upgrading the side gauge adjustment handle to a stepper motor drive. After the stepper motor 140 adjusts the side gauge size, a high-precision position sensor installed on the side provides feedback to the stepper motor 140 to adjust the side gauge size, achieving closed-loop control in the program.

[0054] Using a stepper motor to adjust the side gauge dimensions enables real-time, automatic adjustment. After the image acquisition module completes its image acquisition task, it compares the cutting line on the image with the template and transmits the deviation value to the computer. The computer then passes this deviation value to the PLC to control stepper motor 140 to adjust the corresponding side gauge parameters. After adjustment, the value is compared with the change value of the position sensor to ensure the accuracy of the motor adjustment parameters. The stepper motor 140 can achieve an adjustment accuracy of 0.02mm, significantly improving the side gauge adjustment precision.

[0055] The system also allows for manual intervention to adjust the side gauge dimensions. After the collected data is transmitted to the computer, the computer presents the deviation parameters as recommended values ​​to the operator. The operator then uses the collected image and the actual position of the product on the operating side, adding subjective judgment to complete the adjustment of the side gauge dimensions.

[0056] Compared with previous operating methods, the automatic adjustment and manual intervention adjustment of the side gauge size can reduce the use of manpower, greatly improve work efficiency, and reduce the downtime of side gauge adjustment.

[0057] This embodiment can more accurately and directly measure the deviation size of the side gauge, thereby improving the cutting quality of the product. When capturing the edge of a large product, the camera cannot capture the cutting line vertically due to the position relationship. The innovative use of an arc-shaped camera bracket does not require adjusting the focal length when adjusting the camera position, and meets the requirements for data use. In the side gauge adjustment process, a stepper motor is innovatively used to drive the side gauge parameter adjustment. When adjusting the side gauge size, manual intervention can be used, or a fully automatic method can be used, which is simple and fast. The application of this process control and early warning system eliminates the previous situation of wasteful cutting, ensures the cutting quality of the product, and at the same time reduces manual participation and reduces employee labor intensity.

[0058] In this application, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The term "plurality" refers to two or more, unless expressly limited otherwise. Terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; "connected" can mean a direct connection or an indirect connection through an intermediary. Those skilled in the art can understand the specific meanings of the above terms in this application based on the specific circumstances.

[0059] In the description of this application, it should be understood that the terms "upper", "lower", "rear", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on this application.

[0060] Throughout this specification, terms such as "one embodiment," "some embodiments," and "specific embodiments" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0061] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A detection and control system for the cutting position of large-size cut products, wherein: include: Horizontal pan / tilt; An image acquisition module, comprising an industrial camera, a light source and a bracket, wherein the bracket is arranged on the horizontal pan-tilt platform, the industrial camera and the light source are both movably connected to the bracket, and the bracket comprises an arc bracket; A side gauge driving module is arranged on one side of the horizontal pan head, and the side gauge driving module includes a side gauge, a stepper motor and a position sensor. The stepper motor is connected to the side gauge and is used to adjust the side gauge. The position sensor is connected to the stepper motor and is used to provide feedback to the stepper motor to adjust the size of the side gauge. The information processing module is connected to the image acquisition module and the side gauge driving module respectively. The information processing module is used to obtain the image captured by the image acquisition module, and obtain the deviation value between the cutting line of the image and the template according to the image, and control the stepper motor to adjust the side gauge according to the deviation value.

2. The detection and control system for the cutting position of large-size cut products according to claim 1, wherein: The arc-shaped bracket is a 45° arc-shaped bracket with the lower blade of the cutting knife as the center of the circle and the distance from the cutting knife to the center line of the horizontal pan-tilt platform as the radius.

3. The detection and control system for the cutting position of large-size cut products according to claim 1, wherein: The horizontal pan head includes a first horizontal pan head and a second horizontal pan head, and the first horizontal pan head and the second horizontal pan head are arranged at an interval.

4. The detection and control system for the cutting position of large-size cut products according to claim 3, wherein: The arc-shaped bracket includes a first arc-shaped bracket and a second arc-shaped bracket, the first arc-shaped bracket is connected to the first horizontal pan head, and the second arc-shaped bracket is connected to the second horizontal pan head.

5. The detection and control system for the cutting position of large-size cut products according to claim 4, wherein: The industrial camera comprises a front cutting line camera and a rear cutting line camera, wherein the front cutting line camera is movably connected to the first arc-shaped bracket, and the rear cutting line camera is movably connected to the second arc-shaped bracket.

6. The detection and control system for the cutting position of large-size cut products according to claim 5, wherein: The light source includes a first light source and a second light source, wherein the first light source is connected to the front-end cutting line camera, and the second light source is connected to the rear-end cutting line camera.

7. A detection and control system for the cutting position of a large-size cut product according to any one of claims 1 to 6, wherein: The information processing module includes a computer, which is connected to the industrial camera and is used to obtain an image captured by the industrial camera and calculate a deviation value between a cutting line of the image and a template based on the image.

8. The detection and control system for the cutting position of large-size cut products according to claim 7, wherein: The information processing module also includes a PLC, which is connected to the computer and the stepper motor respectively, and is used to control the stepper motor to adjust the corresponding parameters of the side gauge according to the deviation value.

9. The detection and control system for the cutting position of large-size cut products according to claim 8, wherein: Also includes: An alarm device is connected to the information processing module and is used to give an alarm when the deviation value is greater than a preset value.

10. The detection and control system for the cutting position of a large-size cut product according to claim 9, wherein: The PLC is also connected to the alarm device, and is used to control the alarm device to alarm when the deviation value is greater than a preset value.

11. The detection and control system for the cutting position of a large-size cut product according to claim 10, wherein: The alarm device comprises an alarm light.

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