Safety grating real-time monitoring system and method based on multi-beam synchronous scanning

Abstract

The invention discloses a safety grating real-time monitoring system and method based on multi-beam synchronous scanning, and the system comprises a pedestal, a main housing, a photoelectric emitter, a photoelectric receiver, a controller, and a rotation driving mechanism, the pedestal is provided with a plurality of vertical mounting holes in an up-down penetrating manner, and the top end is provided with a plurality of vertical positioning holes; the left portion and the right portion of the base are each connected with a sliding seat in a left-right sliding mode, and the two sliding seats are each provided with a supporting piece. The main shells can be rotated through the rotary driving mechanism, so that the angle of the two main shells relative to the base is changed, namely, the angle of a light curtain emitted by the photoelectric emitter relative to the base can be changed, and meanwhile, the projection distance of the light distance on the front plane and the projection distance of the light distance on the horizontal plane are changed due to the change of the angle; therefore, the monitoring requirement of an object from the front-back direction or the up-down direction is met.

Description

Technical Field

[0001] The present invention relates to the technical field of grating monitoring, and particularly relates to a real-time monitoring system and method for a safety grating based on multi-beam synchronous scanning. Background Art

[0002] A safety grating is an optoelectronic sensor device widely used in industrial safety protection. When the light emitted by the optoelectronic emitter is blocked by an external object and the optoelectronic receiver fails to receive the light, an alarm will be triggered, thus realizing the monitoring function. The Chinese utility model patent with the application number 202421405205.3 provides a safety grating that is easy to install. This safety grating can adjust the installation range of the emission grating and the reception grating, and can reduce the usage limitations of the safety grating. However, this device cannot adjust the angle of the light curtain formed by the emission grating and the reception grating, nor can it specifically adjust the vertical distance between the light rays of the grating, resulting in poor detection effects and being unable to better meet the monitoring needs. For example, when the size of the object to be monitored is large, if the light distance is too small, it is easy to cause waste. When the size of the object to be monitored is small, if the light distance is too large, it is easy to miss. When the object passes through vertically, the monitoring range of the upright safety grating is extremely limited and it is difficult to effectively monitor, highlighting the deficiencies of the prior art. Summary of the Invention

[0003] The purpose of the present invention is to provide a real-time monitoring system for a safety grating based on multi-beam synchronous scanning to solve the technical problems that the prior art cannot adjust the angle of the light curtain formed by the emission grating and the reception grating, nor can it specifically adjust the vertical distance between the light rays of the grating, resulting in poor detection effects.

[0004] To achieve the above object, the present invention adopts the following technical solutions: A real-time monitoring system for a safety grating based on multi-beam synchronous scanning, comprising a base, mounting holes, positioning holes, sliding seats, support members, insertion rods, main housings, photoelectric emitters, photoelectric receivers, a controller, and a rotary drive mechanism. The base is vertically penetrated by a plurality of vertical mounting holes, and a plurality of vertical positioning holes are opened at the top. The left and right parts of the base are respectively slidably connected to sliding seats. Each of the two sliding seats is provided with a support member and an insertion rod capable of moving up and down. The insertion rod can be inserted into and out of the positioning hole vertically. Each of the two support members is provided with a rotatable main housing along the side plane. One of the main housings is provided with multiple columns of photoelectric emitters arranged horizontally from left to right and arranged in sequence from top to bottom from front to back. The other main housing is provided with multiple columns of photoelectric receivers arranged horizontally from left to right and arranged in sequence from top to bottom from front to back. Each of the photoelectric emitters and each of the photoelectric receivers are correspondingly arranged left and right. The photoelectric emitters and photoelectric receivers are electrically connected to the controller. The controller is connected to an external power supply. The controller is known prior art, such as a single-chip microcomputer, a PLC, and an industrial personal computer, etc. Each of the two support members is provided with a rotary drive mechanism, and the two rotary drive mechanisms respectively drive the main housing to rotate.

[0005] On the basis of the above technical solution, the support member includes a lifting seat, a sliding cylinder, and a support shaft. Each of the two sliding seats is slidably connected to a lifting seat up and down, and a vertical sliding cylinder is slidably connected to the upper part of each of them. The two sliding cylinders are respectively rotatably connected to the two insertion rods. The two insertion rods are respectively inserted through the sliding seats and can move up and down and rotate relative to the sliding seats. The two insertion rods are respectively threadedly connected to the two lifting seats. Each of the two lifting seats is rotatably connected to a support shaft extending horizontally from left to right. The two support shafts are respectively fixed to the two main housings.

[0006] On the basis of the above technical solution, the rotary drive mechanism includes a worm gear, a worm, and a handwheel. The two support shafts are respectively coaxially fixed with worm gears. Each of the two lifting seats is rotatably connected to a worm extending in the front-rear direction. The two worms are respectively engaged with the two worm gears. The worm and the insertion rod are respectively coaxially fixed with a handwheel.

[0007] On the basis of the above technical solution, the two support shafts are respectively coaxially fixed with graduated disks. The outer circumferences of the two graduated disks are respectively provided with a plurality of graduations at equal angular intervals around the circumference. The front parts of the two lifting seats are respectively fixed with indicating arrows, and the two indicating arrows respectively point to the graduations of the two graduated disks.

[0008] On the basis of the above technical solution, the safety grating real-time monitoring system includes an extension mechanism. The extension mechanism includes a secondary housing and a bidirectional lead screw. The upper and lower parts of the two main housings are respectively connected with a vertical secondary housing in a vertically sliding manner. The photoelectric emitter includes a main emitter and a secondary emitter. The photoelectric receiver includes a main receiver and a secondary receiver. A plurality of the main receivers are arranged in sequence from top to bottom and are fixed to one of the main housings in a left-right extending direction. A plurality of the secondary receivers are arranged in sequence from top to bottom and are fixed to one of the secondary housings in a left-right extending direction. A plurality of the main emitters are arranged in sequence from top to bottom and are fixed to the other main housing in a left-right extending direction. A plurality of the secondary emitters are arranged in sequence from top to bottom and are fixed to the other secondary housing in a left-right extending direction. The main emitter, the secondary emitter, the main receiver, and the secondary receiver are respectively electrically connected to the controller. When each main emitter corresponds to each main receiver left and right, each secondary emitter can also correspond to each secondary receiver left and right. The two main housings are respectively rotatably connected with a vertical bidirectional lead screw. The external thread rotation directions of the upper and lower parts of the bidirectional lead screw are opposite. The two bidirectional lead screws are respectively threadedly connected to the secondary housings of the upper and lower parts of the main housing. The two bidirectional lead screws are respectively coaxially fixed with handwheels. The main housing and the secondary housing are respectively fixed with transparent protection plates. The protection plates are used to protect the main emitter, the secondary emitter, the main receiver, and the secondary receiver while satisfying light propagation.

[0009] Compared with the prior art, the present invention has the following advantages: The present invention can make the main housing rotate through the rotation driving mechanism, thereby changing the angle of the two main housings relative to the base, that is, the angle of the light curtain emitted by the photoelectric emitter relative to the base can be changed. At the same time, the change in the angle will cause the projection of the light spacing on the positive plane and the projection spacing on the horizontal plane to change, so as to meet the monitoring needs of objects from the front and back directions or the up and down directions. By using the time difference of triggering alarms or the specific photoelectric receivers that trigger alarms and other data of the multi-column photoelectric emitters and photoelectric receivers provided on the main housing, multi-beam synchronous scanning and real-time monitoring can be realized, and the detection effect can be improved.

[0010] By rotating the handwheel where the bidirectional lead screw is located, the secondary housings of the upper and lower parts of the main housing can be made to approach and move away from each other, thereby adjusting the vertical spacing between the secondary housings. Subsequently, the spacing of the projections of the light formed by the main emitter and the light formed by the secondary emitter on the positive plane or the horizontal plane can be adjusted, so as to meet the detection needs of objects of different sizes. And when the secondary housing extends, its monitoring coverage range will also increase or decrease accordingly, so as to meet different needs and improve the monitoring effect. Description of the Drawings

[0011] Figure 1 It is an axonometric structural schematic diagram of the present invention.

[0012] Figure 2Schematic diagram of the cooperation between the auxiliary housing and the main housing of the present invention.

[0013] Figure 3 Schematic diagram of the cooperation between the worm and the worm wheel of the present invention.

[0014] Figure 4 Schematic diagram of the cooperation between the bidirectional lead screw and the auxiliary housing of the present invention.

[0015] In the figure: 1. Base, 2. Mounting hole, 3. Positioning hole, 4. Sliding seat, 6. Plug rod, 7. Main housing, 12. Lifting seat, 13. Sliding cylinder, 14. Support shaft, 15. Worm wheel, 16. Worm, 17. Hand wheel, 18. Dial, 19. Scale, 20. Indicator arrow, 22. Auxiliary housing, 23. Main transmitter, 24. Auxiliary transmitter, 25. Main receiver, 26. Auxiliary receiver, 27. Bidirectional lead screw, 28. Protective plate. Detailed implementation manners

[0016] The present invention will be further elaborated in detail below in conjunction with the accompanying drawings and specific embodiments.

[0017] As Figures 1 - 4 shown, a real-time monitoring system for a safety grating based on multi-beam synchronous scanning includes a base 1, mounting holes 2, positioning holes 3, sliding seats 4, supporting members, plug rods 6, a main housing 7, photoelectric transmitters, photoelectric receivers, a controller, and a rotation driving mechanism. A plurality of vertical mounting holes 2 penetrate through the base 1 up and down, and a plurality of vertical positioning holes 3 are opened at the top end. The left and right parts of the base 1 are each slidably connected to a sliding seat 4 left and right. The two sliding seats 4 are respectively provided with supporting members, and are respectively provided with plug rods 6 that can move up and down. The plug rods 6 can be inserted into and out of the positioning holes 3 up and down. The two supporting members are respectively provided with rotatable main housings 7 along the side plane. One of the main housings 7 is provided with multiple columns of photoelectric transmitters arranged in sequence from front to back and from top to bottom along the left and right horizontal directions, and the other main housing 7 is provided with multiple columns of photoelectric receivers arranged in sequence from front to back and from top to bottom along the left and right horizontal directions. Each of the photoelectric transmitters and each of the photoelectric receivers correspond to each other left and right. The photoelectric transmitters and photoelectric receivers are electrically connected to the controller. The controller is connected to an external power source. The two supporting members are respectively provided with rotation driving mechanisms, and the two rotation driving mechanisms respectively drive the main housing 7 to rotate.

[0018] The support member includes a lifting seat 12, a sliding cylinder 13, and a support shaft 14. The two sliding seats 4 are respectively connected to the lifting seat 12 in a vertically sliding manner, and the upper parts are respectively connected to the vertical sliding cylinders 13 in a vertically sliding manner. The two sliding cylinders 13 are respectively rotatably connected to the two insertion rods 6. The two insertion rods 6 are respectively inserted through and connected to the sliding seats 4, and can move up and down and rotate relative to the sliding seats 4. The two insertion rods 6 are respectively threadedly connected to the two lifting seats 12. The two lifting seats 12 are respectively rotatably connected to the support shafts 14 extending in the left-right horizontal direction. The two support shafts 14 are respectively fixed to the two main housings 7.

[0019] Further, by manually rotating the insertion rod 6 forward and backward, the height of the lifting seat 12 relative to the base 1 can be adjusted, so as to adjust the height of the light curtain generated by the photoelectric emitter relative to the base 1, and then meet different needs.

[0020] The rotary drive mechanism includes a worm gear 15, a worm 16, and a handwheel 17. The two support shafts 14 are respectively coaxially fixed with the worm gears 15. The two lifting seats 12 are respectively rotatably connected to the worms 16 extending in the front-rear direction. The two worms 16 are respectively engaged with the two worm gears 15. The worm 16 and the insertion rod 6 are respectively coaxially fixed with the handwheel 17.

[0021] The two support shafts 14 are respectively coaxially fixed with scale disks 18. The outer circumferences of the two scale disks 18 are respectively provided with a plurality of scales 19 at equal angular intervals in the circumferential direction. The front parts of the two lifting seats 12 are respectively fixed with indicating arrows 20. The two indicating arrows 20 respectively point to the scales 19 of the two scale disks 18.

[0022] Further, when the support shaft 14 is rotated to adjust the inclination angle of the main housing 7 relative to the base 1, by observing the scale 19 of the scale disk 18 pointed by the indicating arrow 20, the inclination degree of the main housing 7 relative to the base 1 can be determined, so as to facilitate making the inclination degrees of the two main housings 7 tend to be consistent to ensure that the photoelectric emitter and the photoelectric receiver correspond to each other left and right.

[0023] The safety grating real-time monitoring system includes an extension mechanism. The extension mechanism includes a secondary housing 22 and a bidirectional lead screw 27. The upper and lower parts of the two main housings 7 are respectively connected with the vertical secondary housing 22 in a vertically sliding manner. The optoelectronic emitter includes a main emitter 23 and a secondary emitter 24. The optoelectronic receiver includes a main receiver 25 and a secondary receiver 26. A plurality of the main receivers 25 are arranged in sequence from top to bottom and are fixed to one of the main housings 7 in a left-right extending direction. A plurality of the secondary receivers 26 are arranged in sequence from top to bottom and are fixed to one of the secondary housings 22 in a left-right extending direction. A plurality of the main emitters 23 are arranged in sequence from top to bottom and are fixed to the other main housing 7 in a left-right extending direction. A plurality of the secondary emitters 24 are arranged in sequence from top to bottom and are fixed to the other secondary housing 22 in a left-right extending direction. The main emitter 23, the secondary emitter 24, the main receiver 25, and the secondary receiver 26 are respectively electrically connected to the controller. When each of the main emitters 23 corresponds to each of the main receivers 25 in the left-right direction, each of the secondary emitters 24 can also correspond to each of the secondary receivers 26 in the left-right direction. The two main housings 7 are respectively rotatably connected with a vertical bidirectional lead screw 27. The external thread helix directions of the upper and lower parts of the bidirectional lead screw 27 are opposite. The two bidirectional lead screws 27 are respectively threadedly connected to the secondary housings 22 of the upper and lower parts of the main housing 7. The two bidirectional lead screws 27 are respectively coaxially fixed with handwheels 17. The main housing 7 and the secondary housing 22 are respectively fixed with transparent protective plates 28. The protective plates 28 are used to protect the main emitter 23, the secondary emitter 24, the main receiver 25, and the secondary receiver 26 and at the same time satisfy the light propagation.

[0024] For the monitoring usage method of the safety grating real-time monitoring system based on multi-beam synchronous scanning, during use, fasteners (such as bolts) are used to fix the base 1 by using the mounting holes 2. By lifting the insertion rod 6 and then moving the sliding seat 4, the insertion rod 6 is inserted into the corresponding positioning hole 3, so that the positions of the two sliding seats 4 relative to the base 1 can be adjusted to meet different requirements. By rotating the driving mechanism, the main housing 7 can be rotated, so as to change the angle of the two main housings 7 relative to the base 1, that is, the angle of the light curtain emitted by the optoelectronic emitter relative to the base 1 can be changed. At the same time, the change in the angle will cause the distance between the projections of the light on the frontal plane and the horizontal plane to change, so as to meet the monitoring requirements for objects from the front-back direction or the up-down direction. By using data such as the time difference of triggering alarms by the multi-column optoelectronic emitters and optoelectronic receivers provided on the main housing 7 or the specific positions of the optoelectronic receivers triggering alarms, multi-beam synchronous scanning and real-time monitoring can be achieved.

[0025] By manually rotating the handwheel 17 where the worm 16 is located, the support shaft 14 can be rotated by using the meshing of the worm 16 and the worm gear 15, so as to drive the main housing 7 to rotate, that is, change the angle of the light curtain formed by the optoelectronic emitter relative to the base 1.

[0026] By rotating the handwheel 17 where the bidirectional lead screw 27 is located, the auxiliary casings 22 in the upper and lower parts of the main casing 7 can be made to approach and move away from each other, thereby adjusting the vertical distance between the auxiliary casings 22, and then the distance between the projections of the light rays formed by the main emitter 23 and the light rays formed by the auxiliary emitter 24 in the frontal plane or the horizontal plane can be adjusted, so as to meet the detection requirements for objects of different sizes. Moreover, when the auxiliary casing 22 expands and contracts, its monitoring coverage range will also increase or decrease accordingly, thus meeting different needs.

[0027] The above is a preferred embodiment of the present invention. For those of ordinary skill in the art, according to the teachings of the present invention, without departing from the principles and spirit of the present invention, the changes, modifications, substitutions, and variations made to the embodiments still fall within the protection scope of the present invention.

Claims

1. A real-time monitoring system for a safety grating based on multi-beam synchronous scanning, comprising a base (1), mounting holes (2), positioning holes (3), a sliding seat (4), a support member, a plug rod (6), a main housing (7), a photoelectric emitter, a photoelectric receiver, a controller, and a rotary drive mechanism, characterized in that: The base (1) is vertically penetrated by a plurality of vertical mounting holes (2), and a plurality of vertical positioning holes (3) are formed at the top. The left and right parts of the base (1) are respectively connected with sliding seats (4) in a left-right sliding manner. The two sliding seats (4) are respectively provided with support members, and are respectively provided with insertion rods (6) capable of moving up and down. The insertion rods (6) can be inserted into and out of the positioning holes (3) vertically. The two support members are respectively provided with rotatable main housings (7) along the side plane. One of the main housings (7) is provided with multiple columns of photoelectric emitters arranged in sequence from top to bottom along the left-right horizontal direction from front to back. The other main housing (7) is provided with multiple columns of photoelectric receivers arranged in sequence from top to bottom along the left-right horizontal direction from front to back. Each of the photoelectric emitters and each of the photoelectric receivers are corresponding to each other left and right. The photoelectric emitters and photoelectric receivers are electrically connected to a controller. The controller is connected to an external power source. The two support members are respectively provided with rotation driving mechanisms, and the two rotation driving mechanisms respectively drive the main housings (7) to rotate.

2. The real-time monitoring system of a safety grating based on multi-beam synchronous scanning according to claim 1, characterized in that: The support members include lifting seats (12), sliding cylinders (13), and support shafts (14). The two sliding seats (4) are respectively connected with lifting seats (12) in an up-down sliding manner, and are respectively connected with vertical sliding cylinders (13) in an up-down sliding manner at the upper parts. The two sliding cylinders (13) are respectively rotatably connected to the two insertion rods (6). The two insertion rods (6) are respectively inserted through the sliding seats (4) and can move up and down and rotate relative to the sliding seats (4). The two insertion rods (6) are respectively threadedly connected to the two lifting seats (12). The two lifting seats (12) are respectively rotatably connected to support shafts (14) extending along the left-right horizontal direction. The two support shafts (14) are respectively fixed to the two main housings (7).

3. The real-time monitoring system of a safety grating based on multi-beam synchronous scanning according to claim 2, characterized in that: The rotation driving mechanisms include worm wheels (15), worm shafts (16), and hand wheels (17). The two support shafts (14) are respectively coaxially fixed with worm wheels (15). The two lifting seats (12) are respectively rotatably connected to worm shafts (16) extending along the front-back direction. The two worm shafts (16) are respectively engaged with the two worm wheels (15). The worm shafts (16) and the insertion rods (6) are respectively coaxially fixed with hand wheels (17).

4. A real-time monitoring system for a safety grating based on multi-beam synchronous scanning according to claim 2 or 3, characterized in that: The two support shafts (14) are respectively coaxially fixed with graduated disks (18). The outer circumferences of the two graduated disks (18) are respectively provided with a plurality of graduations (19) at equal angular intervals in the circumferential direction. The front parts of the two lifting seats (12) are respectively fixed with indicating arrows (20). The two indicating arrows (20) respectively point to the graduations (19) of the two graduated disks (18).

5. A real-time monitoring system for a safety grating based on multi-beam synchronous scanning according to claims 1-3, characterized in that: The described safety grating real-time monitoring system includes an extension mechanism, and the extension mechanism includes a secondary housing (22) and a bidirectional lead screw (27). The upper and lower parts of the two main housings (7) are respectively connected to the vertical secondary housing (22) in a vertically sliding manner. The photoelectric emitter includes a main emitter (23) and a secondary emitter (24), and the photoelectric receiver includes a main receiver (25) and a secondary receiver (26). A plurality of the main receivers (25) are arranged in sequence from top to bottom and are fixed to one of the main housings (7) in a left-right extending direction. A plurality of the secondary receivers (26) are arranged in sequence from top to bottom and are fixed to one of the secondary housings (22) in a left-right extending direction. A plurality of the main emitters (23) are arranged in sequence from top to bottom and are fixed to the other main housing (7) in a left-right extending direction. A plurality of the secondary emitters (24) are arranged in sequence from top to bottom and are fixed to the other secondary housing (22) in a left-right extending direction. The main emitter (23), the secondary emitter (24), the main receiver (25), and the secondary receiver (26) are respectively electrically connected to a controller. When each of the main emitters (23) corresponds to each of the main receivers (25) left and right, each of the secondary emitters (24) can also correspond to each of the secondary receivers (26) left and right. The two main housings (7) are respectively rotatably connected to a vertical bidirectional lead screw (27). The external thread rotation directions of the upper and lower parts of the bidirectional lead screw (27) are opposite. The two bidirectional lead screws (27) are respectively threadedly connected to the secondary housings (22) of the upper and lower parts of the main housing (7). The two bidirectional lead screws (27) are respectively coaxially fixed with handwheels (17). The main housing (7) and the secondary housing (22) are respectively fixed with transparent protective plates (28). The protective plates (28) are used to protect the main emitter (23), the secondary emitter (24), the main receiver (25), and the secondary receiver (26) while allowing light to propagate.

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