Laser scanning device for safe operation of blanking line

Abstract

The utility model discloses a laser scanning device for safe operation of a blanking line, which relates to the technical field of contour detection and comprises a blanking line body, and a main transmitting grating, a main receiving grating, a side transmitting grating, a side receiving grating and a longitudinal grating group are respectively arranged on two sides, the upper direction and the lower direction of the blanking line body. The two main receiving gratings are mounted on the same auxiliary mounting plate and matched with the laser sensors mounted in an array mode to construct a three-dimensional protective net covering the whole stroke of the blanking line, the two main receiving gratings mounted on the same auxiliary mounting plate are staggered, and a small section of coincident detection area is formed between the two main receiving gratings. According to the device, a detection blind area caused by traditional grating splicing is eliminated, the protection blind area rate is greatly reduced, the problem that in traditional protection, small parts stretch into equipment gaps and cannot be detected is thoroughly solved, the accident rate caused by the blind area is prevented from being greatly reduced, and operation safety is comprehensively guaranteed from the spatial dimension.

Description

Technical Field

[0001] This utility model relates to the field of contour detection technology, specifically to a laser scanning device for safe operation of a blanking line. Background Technology

[0002] In the industrial production sector, blanking lines (especially large stamping lines and long-distance multi-station production lines in automobile manufacturing) are core production equipment, and their operating efficiency and safety are directly related to the continuity of production and the safety of workers. With the improvement of industrial automation, the operating speed of blanking lines is constantly increasing, and the stamping frequency can reach 10-50 times / minute. However, traditional safety protection methods have gradually exposed many unavoidable shortcomings and can no longer meet the safety protection requirements of modern production.

[0003] Existing material unloading lines mostly use optical grating safety gates for protection, but these have significant human-caused risks. Some operators, in pursuit of convenience, will illegally and manually disable the protection system. Such human-caused accidents, such as limb entanglement and crushing, account for more than 60% of all material unloading line accidents, becoming the primary hidden danger restricting production safety. In terms of protection coverage, the protection radius of traditional optical gratings is limited. For long-distance material unloading lines of 10-30 meters, multiple sets of optical gratings need to be spliced ​​together to achieve protection coverage. However, the splicing points are prone to forming a 50-100mm blind spot. Moreover, optical grating protection can only achieve planar detection and cannot form a three-dimensional protective net. When small parts such as the operator's hands and tools are inserted into the gaps in the equipment, they are difficult to detect in time. The accident rate caused by the blind spot is as high as 35%.

[0004] To address the aforementioned issues, a laser scanning device for safe operation of a material feeding line is proposed. Utility Model Content

[0005] To solve the above-mentioned technical problems, a laser scanning device for safe operation of a material feeding line is provided.

[0006] To achieve the above objectives, the present invention can be implemented using the following technical solutions:

[0007] This utility model provides a laser scanning device for safe operation of a material feeding line, comprising: a material feeding line body, two main mounting plates symmetrically mounted on both sides of the material feeding line body parallel to its length direction, a main emitting grating fixedly mounted on one side of each main mounting plate, a secondary mounting plate mounted at the middle position of the two sides of the material feeding line body parallel to its length direction, a main receiving grating fixedly mounted on both sides of the secondary mounting plate, and a detection area overlapping between the two main receiving gratings mounted on the same secondary mounting plate, the main receiving gratings corresponding to the main emitting gratings, a side emitting grating fixedly mounted on the other side of the main mounting plate, and side receiving gratings symmetrically mounted on both sides of the material feeding line body parallel to its width direction, the side emitting gratings corresponding to the side receiving gratings, and multiple uniformly distributed laser sensors fixedly mounted on the side emitting gratings, side receiving gratings, main emitting gratings, and the sides of the main receiving gratings.

[0008] Furthermore, a top mounting plate is fixedly installed on the top of the two sides of the blanking line body parallel to the length direction, and a bottom mounting plate is fixedly installed on the bottom of the two sides of the blanking line body parallel to the length direction. A longitudinal grating group is installed on the bottom mounting plate and the top mounting plate, and multiple uniformly distributed laser sensors are installed on the side of the longitudinal grating group.

[0009] Furthermore, warning lights are fixedly installed above both the side-emitting grating and the main-emitting grating.

[0010] Furthermore, an operation panel is fixedly installed on one side of the main mounting plate, and a buzzer is installed on the operation panel.

[0011] Furthermore, a power module is installed inside the blanking line body, and the power module is a dual-redundant switching power supply.

[0012] Furthermore, the sub-mounting plate is shaped by bending a flat plate twice at 90° in the middle, with two main receiving gratings symmetrically mounted on the sub-mounting plate.

[0013] Furthermore, a camera module is also installed on the material feeding line body.

[0014] The beneficial effects of this utility model, as described above, are:

[0015] This device constructs a three-dimensional protective net covering the entire length of the unloading line (≤30 meters) by deploying main emitting gratings, main receiving gratings, side emitting gratings, side receiving gratings, and longitudinal grating groups on both sides and above and below the unloading line body, combined with main mounting plates, auxiliary mounting plates, top mounting plates, and bottom mounting plates. It also incorporates an array of laser sensors. Furthermore, the two main receiving gratings mounted on the same auxiliary mounting plate are staggered, forming a small overlapping detection area. Compared to the 50-100mm blind zone formed by traditional grating splicing, this device eliminates the detection blind zone caused by traditional grating splicing, significantly reducing the blind zone rate. It completely solves the problem of not being able to detect small parts extending into equipment gaps in traditional protection methods, greatly reducing the accident rate caused by blind zones and comprehensively ensuring operational safety from a spatial perspective.

[0016] Based on the principle of triangulation, the laser sensor can capture intrusion signals in real time and realize the interlocking control of "detection-judgment-alarm-shutdown". This shortens the response time from intrusion detection to equipment shutdown, which is much faster than the stamping speed of 10-50 times / minute on the blanking line. It can stop the machine in an emergency before the machine completes a stamping action, completely avoiding irreversible damage caused by high-speed stamping. At the same time, the device is equipped with an audible and visual alarm system (buzzer + warning light) to realize graded early warning. When a slight intrusion is detected (such as personnel approaching the protection boundary), an audible and visual reminder is first issued through the buzzer and warning light. If the intrusion continues or escalates, the equipment shutdown is triggered, which allows management personnel time to intervene and avoids frequent production interruptions caused by a single shutdown alarm, thus balancing safety and efficiency.

[0017] The power module adopts a dual-redundant switching power supply, with two independent power supply units working in parallel. When one power supply fails, the other can automatically switch within ≤10ms without power interruption, thus solving the hidden danger of protection failure after the traditional single power supply interruption. Attached Figure Description

[0018] Figure 1 This is a three-dimensional schematic diagram of the overall structure of this utility model from a first perspective;

[0019] Figure 2 This is a three-dimensional schematic diagram of the overall structure of this utility model from a second perspective;

[0020] Figure 3 As shown in this utility model Figure 1 Enlarged view of point A in the middle;

[0021] Figure 4 As shown in this utility model Figure 2 Enlarged view of point B in the middle.

[0022] The reference numerals in the accompanying drawings of this utility model are as follows: 1. Feeding line body; 2. Side receiving grating; 3. Top mounting plate; 4. Side emitting grating; 5. Laser sensor; 6. Longitudinal grating group; 7. Bottom mounting plate; 8. Operation panel; 9. Buzzer; 10. Main receiving grating; 11. Auxiliary mounting plate; 12. Main mounting plate; 13. Main emitting grating; 15. Warning light. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0024] See Figures 1-4 As shown, a laser scanning device for safe operation of a material feeding line, provided by an embodiment of this utility model, will be described in detail below:

[0025] A laser scanning device for safe operation of a material feeding line, such as Figures 1-4 As shown, the system includes: a material feeding line body 1, with two main mounting plates 12 symmetrically mounted on the two longer sides (parallel to the length direction) of the material feeding line body 1. The main mounting plates 12 have an L-shaped cross-section, and a main emitting grating 13 is fixedly mounted on one side of each main mounting plate 12. A secondary mounting plate 11 is installed in the middle of the two longer sides of the material feeding line body 1, with main receiving gratings 10 fixedly mounted on both sides of the secondary mounting plate 11. The main receiving gratings 10 correspond to the main emitting gratings 13 on both sides of the material feeding line body 1. The secondary mounting plate 11 is shaped by bending a flat plate twice at 90° angles in the middle. The two main receiving gratings 10 are symmetrically mounted on the secondary mounting plate 11. Therefore, the two main receiving gratings 10 mounted on the same secondary mounting plate 11 are staggered, and there is a small overlapping detection area between them. Compared with the 50-100mm blind zone formed by traditional grating splicing, this design eliminates the detection blind zone caused by grating splicing. A side-emitting grating 4 is fixedly installed on the other side of the main mounting plate 12. Side-receiving gratings 2 are symmetrically installed on the two shorter sides of the unloading line body 1 (i.e., the two sides parallel to the width direction). The side-emitting grating 4 corresponds to the side-receiving grating 2. The main mounting plate 12 and the auxiliary mounting plate 11 are 0.3-2.5 meters above the ground.

[0026] Multiple uniformly distributed laser sensors 5 are fixedly mounted on the sides of the side-emitting grating 4, the side-receiving grating 2, the main emitting grating 13, and the main receiving grating 10. The laser sensors 5 are mounted on the main mounting plate 12 and the auxiliary mounting plate 11. The laser sensors 5 are laser line scan sensors, such as the Keyence SZ-V series laser line scan sensors. Top mounting plates 3 are fixedly mounted on the top of the two longer sides of the blanking line body 1, and bottom mounting plates 7 are fixedly mounted on the bottom of the two longer sides of the blanking line body 1. A longitudinal grating group 6 is installed between the bottom mounting plate 7 and the top mounting plate 3, and multiple uniformly distributed laser sensors 5 are also fixedly mounted on the sides of the longitudinal grating group 6.

[0027] In this embodiment, a main mounting plate 12 and a secondary mounting plate 11 are installed on the longer sides of the material unloading line body 1 at a height of 0.3-2.5 meters above the ground, correspondingly arranging a main emitting grating 13, a main receiving grating 10, and a laser sensor 5. Simultaneously, side emitting gratings 4 and side receiving gratings 2 are installed on the shorter sides of the material unloading line body 1. Vertical grating groups 6 are mounted on the top mounting plate 3 and bottom mounting plate 7 at the top and bottom of the material unloading line body 1, collectively constructing a three-dimensional protective area covering the entire length of the material unloading line body 1. The laser sensor 5, based on the triangulation principle, scans objects and their positional changes within the protected area in real time. It transmits detected foreign object intrusion signals, such as personnel limbs, inserted tools, and environmental scanning data, to the PLC module of the central processing unit, ensuring that the signal transmission is not affected by electromagnetic interference from the industrial environment and guaranteeing data accuracy. After receiving the real-time data transmitted by the laser sensor 5, the main receiving grating 10, the side receiving grating 2, and the vertical grating group 6, the central processing unit quickly analyzes the data, compares it with preset protected area parameters, and determines whether there is any intrusion behavior exceeding the parameter range.

[0028] Warning lights 15 are fixedly installed above both the side-emitting grating 4 and the main emitting grating 13. An operation panel 8 is fixedly installed on the main mounting plate 12 on one side, and a buzzer 9 is installed on the operation panel 8. A power module is installed inside the unloading line body 1. The power module uses a dual-redundant switching power supply, such as the Mean Well RPS-200-24 dual-redundant switching power supply. Its two power supplies work independently in parallel. When one of the power supply units fails, such as a line interruption or module damage, the power module's built-in switching mechanism automatically switches to the other power supply within ≤10ms to ensure uninterrupted power supply and avoid the failure of the protection system due to a single power supply failure, thus maintaining the continuity of safety protection.

[0029] When an intrusion is detected, the severity of the intrusion is further analyzed, such as a slight approach to the protective boundary or direct entry into the dangerous area of ​​the material unloading line body 1. Simultaneously, the current operating status of the material unloading line body 1 is considered to determine the corresponding response strategy, providing a basis for subsequent alarm and shutdown control decisions. Based on the judgment of the central processing unit, if it is a minor intrusion, such as personnel accidentally approaching the protected area of ​​the material unloading line body 1 but not entering the danger zone, the central processing unit triggers the audible and visual alarm system: the buzzer 9 emits an intermittent warning sound, and the warning light 15 flashes, reminding on-site personnel to stay away. At the same time, the warning information is displayed on the screen of the operation panel 8, notifying management personnel to intervene promptly. If the intrusion continues or escalates, such as personnel's hands or tools entering the equipment operating area within the material unloading line body 1, the central processing unit immediately switches the alarm mode. The buzzer 9 switches to a continuous high-pitched sound, the warning light 15 remains constantly lit, and a shutdown signal is sent to the equipment control terminal of the material unloading line body 1, achieving an "alarm-shutdown" interlock. This ensures that the response time from detecting the intrusion to the shutdown of the material unloading line body 1 is ≤0.2 seconds, preventing damage caused by high-speed stamping.

[0030] In addition, a camera module is installed on the material feeding line body 1. When an intrusion is detected, the camera function is automatically activated to capture images of the scene, providing evidence for subsequent accident tracing. The power module installed inside the main receiving grating 10 supplies power to the laser sensor 5, central processing unit, buzzer 9, warning light 15, main transmitting grating 13, main receiving grating 10, side transmitting grating 4, side receiving grating 2, and longitudinal grating group 6. The power module uses a dual-redundant switching power supply. Under normal operation, the two independent power supply units operate in parallel, with each output current of 4.25A, meeting the overall power requirements of the system. When one power supply unit fails, such as a line interruption or module damage, the power module's built-in switching mechanism automatically switches to the other power supply within ≤10ms to ensure uninterrupted power supply and prevent the protection system from failing due to a single power supply failure, thus maintaining the continuity of safety protection for the material feeding line body 1.

[0031] The above description is merely an embodiment of this utility model and is not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A laser scanning device for blank line operation safety, characterized in that, The utility model relates to a kind of laser cutting machine, including: Blanking line body (1), two main installation plates (12) are symmetrically installed on the both sides of blanking line body (1) parallel to length direction, the side of each main installation plate (12) is fixedly installed with main emission grating (13), the middle position of the both sides of blanking line body (1) parallel to length direction is installed with auxiliary installation plate (11), auxiliary installation plate (11) is fixedly installed with main receiving grating (10) on both sides, and a section of overlapping detection area is formed between the two main receiving gratings (10) installed on the same auxiliary installation plate (11), main receiving grating (10) and main emission grating (13) correspond to each other, the other side of main installation plate (12) is fixedly installed with side emission grating (4), and blanking line body (1) is symmetrically installed with side receiving grating (2) on the both sides parallel to width direction, side emission grating (4) and side receiving grating (2) correspond to each other, and a plurality of evenly distributed laser sensors (5) are fixedly installed on the side of side emission grating (4), side receiving grating (2), main emission grating (13) and main receiving grating (10).

2. A laser scanning device for blank line operation safety according to claim 1, characterized in that, The top of the both sides of blanking line body (1) parallel to length direction is fixedly installed with top installation plate (3), and the bottom of the both sides of blanking line body (1) parallel to length direction is fixedly installed with bottom installation plate (7), and longitudinal grating group (6) is installed on bottom installation plate (7) and top installation plate (3), and a plurality of evenly distributed laser sensors (5) are installed on the side of longitudinal grating group (6).

3. A laser scanning device for blank line operation safety according to claim 2, characterized in that, The side of side emission grating (4) and the side of main emission grating (13) are fixedly installed with warning light (15) above.

4. A laser scanning device for blank line operation safety according to claim 3, characterized in that, Main installation plate (12) on one side is fixedly installed with operating panel (8), and buzzer (9) is installed on operating panel (8).

5. A laser scanning device for blank line operation safety according to claim 4, characterized in that, Power module is installed inside blanking line body (1), and power module selects double-way redundant switching power supply.

6. A laser scanning device for blank line operation safety according to claim 1, characterized in that, The shape of auxiliary installation plate (11) is that the middle of a flat plate is bent twice by 90 degrees, and two main receiving gratings (10) are symmetrically installed on auxiliary installation plate (11).

7. A laser scanning device for blank line operation safety according to claim 2, characterized in that, Camera module is also installed on blanking line body (1).

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