90-degree rotating scanning laser infrared radar safety light curtain device and implementation method thereof

Abstract

The present invention discloses a 90-degree rotating scanning laser infrared radar safety light curtain device and an implementation method thereof, which relate to the technical field of elevator light curtains, including a machine box, a laser protective cover installed in the middle of the upper surface of the machine box, a central controller installed on the side of the upper surface of the machine box close to the laser protective cover, and an angle fine-tuning mechanism and a reciprocating scanning mechanism; in this solution, the laser protective cover is closed through the protective door to enable the laser scanner to start rotating back and forth 90 degrees. By installing the laser scanner in the laser protective cover, not only can the reduction in scanning intensity caused by the adhesion of dust and impurities to the surface of the laser scanner be reduced, but compared with the traditional single fixed detection, this solution can not only cover the bottom and sides of both sides of the elevator and reduce blind spots, but also can adapt to elevator doors of different sizes and shapes through the design of this solution. Through dynamic scanning, it can more accurately determine whether there is an obstacle, thereby reducing elevator door malfunction caused by false triggering.

Description

Technical Field

[0001] The present invention relates to the technical field of elevator light curtains, and in particular to a 90-degree rotating scanning laser infrared radar safety light curtain device and an implementation method thereof. Background Art

[0002] The laser infrared radar safety light curtain emits laser beams and infrared rays to form one or more light curtains to provide full coverage of the monitoring area. Combined with radar technology, it can sense and monitor the existence, location and movement of objects in real time. When an object enters the light curtain area, the device will immediately trigger an alarm or implement corresponding safety protection measures.

[0003] However, existing laser infrared radar safety light curtains are usually densely fixed on both sides of the elevator door. Since there is a certain distance between the laser infrared radar safety light curtains during installation, this will cause horizontal blind spots to form during the scanning process. These blind spots may become safety hazards because objects or people may be pinched or injured in these unmonitored areas.

[0004] In addition, the intensive fixed design limits the flexibility of installation. Elevator doors come in various sizes and structures. The inability to adjust also means that once the installation position deviates or the elevator door structure changes, the safety light curtain may no longer provide effective protection. In this case, the entire device may need to be reinstalled or replaced, which not only increases maintenance costs but may also affect the normal operation of the elevator. At the same time, fixed safety light curtains need to be customized according to the size of different elevator doors, and thus cannot adapt to more types of elevator doors, thus affecting their wide application.

[0005] Therefore, a 90-degree rotating scanning laser infrared radar safety light curtain device and its implementation method are proposed to solve the above problems. Summary of the Invention

[0006] In view of this, the technical problem to be solved by the present invention is to propose a 90-degree rotating scanning laser infrared radar safety light curtain device and its implementation method to solve the problems of blind spots and poor adaptability of densely fixed light curtains in elevators in the prior art.

[0007] To achieve the above-mentioned object, the present invention provides the following technical solution: a 90-degree rotating scanning laser infrared radar safety light curtain device, comprising a machine box, a laser protective cover installed in the middle of the upper surface of the machine box, a central controller installed on the side of the upper surface of the machine box close to the laser protective cover, and also including an angle fine-tuning mechanism and a reciprocating scanning mechanism;

[0008] The angle fine-tuning mechanism is arranged in the machine box, and the angle fine-tuning mechanism is used for fine-tuning the angle of the scanning device;

[0009] The reciprocating scanning mechanism is arranged in the angle fine-tuning mechanism, and the reciprocating scanning mechanism is used for the reciprocating rotation of the scanning device.

[0010] Preferably, the angle fine-tuning mechanism includes an arc-shaped plate, which is fixedly connected to the machine box. An arc-shaped groove is provided in the arc-shaped plate, and an adjustment knob is slidably connected to the arc-shaped groove.

[0011] Preferably, one end of the adjusting knob passes through the outer surface of the machine box, the other end of the adjusting knob is threadedly connected to an adjusting plate, and the adjusting plate is rotatably connected to the machine box away from one end of the adjusting knob.

[0012] Preferably, the reciprocating scanning mechanism includes a first gear, the middle part of the first gear is rotatably connected to the end of the adjustment plate away from the adjustment knob, the tooth surface of the first gear is meshed with a second gear, the first gear and the second gear are symmetrically meshed and arranged on the adjustment plate, the middle part of the first gear is fixedly connected to a transmission shaft, and the upper end of the transmission shaft is fixedly connected to an arc-shaped directional plate.

[0013] Preferably, a push rod is fixedly connected to the upper surface of the arc-shaped orienting plate, a turntable is rotatably connected to the middle of the upper surface of the adjustment plate, an extrusion groove is opened on the upper surface of the turntable, and arc-shaped orienting grooves are evenly opened on the outer periphery of the lower surface of the turntable, and the outer periphery of the arc-shaped orienting plate slides in the arc-shaped orienting grooves.

[0014] Preferably, the push rod slides in the extrusion groove at one end away from the first gear, an electric telescopic rod is fixedly connected to the middle of the turntable, and a laser scanner is installed at the end of the electric telescopic rod away from the turntable, an adjustment groove is opened on the side of the machine box close to the laser protective cover, and the outer surface of the electric telescopic rod is slidably connected to the adjustment groove, and the adjustment groove is arranged in the laser protective cover.

[0015] The method for implementing a 90-degree rotating scanning laser infrared radar safety light curtain device includes:

[0016] S1, adjust to zero:

[0017] Place the electronic theodolite on the elevator door and make it roughly horizontal. After tightening the connecting screw, set the horizontal angle of the box to zero. When a straight line is drawn, the accuracy of the laser scanner's subsequent rotation to a 90-degree angle can be ensured.

[0018] S2, centering adjustment: Move the laser scanner to its scanning coverage area to align the centering mark accurately with the center of the measuring station. After accurate adjustment, tighten the adjustment knob.

[0019] S3, equipment monitoring test; the infrared transmitter installed in the laser protective cover emits an infrared beam, and the central controller is responsible for receiving the signal control transmitted by these beams. When the beam is blocked by an object, the laser scanner transmits an electrical signal to the central controller, and the system detects the abnormality and triggers an interrupt through the control of the central controller.

[0020] S3 specifically includes:

[0021] S3.1, the signal elevator car is placed on both sides of the elevator door. The machine box is installed above the elevator door. The laser scanner rotates to form an all-round scanning range within a 90-degree range, effectively covering the upper, lower, left, and right areas on both sides of the elevator door. At the same time, the control system installed in the central controller analyzes the changes in the laser scanner signal to determine whether there are objects or people entering the protection area. If there is an obstruction, the elevator door will stop closing and reverse to open until the obstacle is opened.

[0022] S3. Safety protection: For elevators with double doors, the elevator car can be installed at the upper angles on both sides of the elevator door. For single doors, only one side needs to be installed.

[0023] Compared with the prior art, the present invention provides a 90-degree rotating scanning laser infrared radar safety light curtain device and its implementation method, which has the following beneficial effects:

[0024] 1. In this solution, the laser scanner starts to rotate back and forth 90 degrees when the protective door laser protective cover is closed. By installing the laser scanner in the laser protective cover, it can not only reduce the reduction in scanning intensity caused by the adhesion of dust and impurities on the surface of the laser scanner, but also, compared with the traditional single fixed detection, this solution can not only cover the bottom and sides of both sides of the elevator, reducing blind spots, but also, compared with traditional fixed devices that may need to be customized according to the size of the elevator door, this solution can be designed to adapt to elevator doors of different sizes and shapes. Through dynamic scanning, it can more accurately determine whether there is an obstacle, reducing the malfunction of the elevator door due to false triggering.

[0025] 2. The angle of the monitoring equipment can be adjusted through the settings in the solution, so that the monitoring equipment can be quickly debugged and fixed in the area after installation. In an environment with limited space and complex structure such as an elevator, the angle adjustment function can ensure that the light curtain can accurately cover the area that needs to be monitored; by adjusting the scanning area of ​​the laser scanner, it can ensure that the infrared light can be more effectively irradiated on the target object, thereby improving the accuracy and reliability of detection.

[0026] 3. At the same time, in this solution, for double doors, a scanning device of this solution is installed on one side above the double doors on both sides, and the starting scanning area of ​​the laser scanner inside the double doors on both sides is opposite, that is, the scanning area on one side starts from the vertical direction of the box door and scans 90 degrees to the top of the car door, while the scanning area on the other side starts from the vertical direction of the car door and 90 degrees above the car door to the box door. This setting can reduce the blind area caused by the time difference of the laser scanner in unilateral scanning; BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0028] Figure 2 This is an auxiliary schematic diagram of the three-dimensional structure of the present invention;

[0029] Figure 3 This is a schematic diagram of the structural connection relationship of the angle fine-tuning mechanism of the present invention;

[0030] Figure 4 For the present invention Figure 3 Enlarged view of point A in the middle;

[0031] Figure 5 This is a schematic diagram of the structural connection relationship of the reciprocating scanning mechanism of the present invention;

[0032] Figure 6 This is a schematic diagram of the decomposed state of the three-dimensional structure of the present invention;

[0033] Figure 7 It is an auxiliary schematic diagram of the decomposed state of the three-dimensional structure of the present invention.

[0034] In the picture:

[0035] 1. Machine box; 11. Laser protection cover; 12. Central controller;

[0036] 2. Angle fine-tuning mechanism; 21. Arc plate; 22. Arc slot; 23. Adjustment knob; 24. Adjustment plate;

[0037] 3. Reciprocating scanning mechanism; 31. First gear; 32. Second gear; 33. Push rod; 34. Arc-shaped directional plate; 35. Turntable; 36. Extrusion slot; 37. Arc-shaped directional slot; 38. Laser scanner; 39. Adjustment slot. DETAILED DESCRIPTION

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0039] The present invention will be described in further detail below with reference to the accompanying drawings and examples.

[0040] First embodiment

[0041] Please refer to Figures 1 to 7 As shown:

[0042] To solve the problems mentioned in the technical solution, the embodiment of the present application provides a 90-degree rotating scanning laser infrared radar safety light curtain device and its implementation method, including a machine box 1, a laser protection cover 11 is installed in the middle of the upper surface of the machine box 1, a central controller 12 is installed on the upper surface of the machine box 1 near the laser protection cover 11, and also includes an angle fine-tuning mechanism 2 and a reciprocating scanning mechanism 3;

[0043] An angle fine-tuning mechanism 2 is provided in the machine box 1 and is used for fine-tuning the angle of the scanning device;

[0044] The reciprocating scanning mechanism 3 is arranged in the angle fine-tuning mechanism 2, and the reciprocating scanning mechanism 3 is used for the reciprocating rotation of the scanning device;

[0045] Specifically, such as Figure 3 and Figure 4 As shown, the arc plate 21 is fixedly connected to the machine box 1, and an arc groove 22 is formed in the arc plate 21. An adjustment knob 23 is slidably connected to the arc groove 22; one end of the adjustment knob 23 passes through the outer surface of the machine box 1, and the other end of the adjustment knob 23 is threadedly connected to the adjustment plate 24, and the end of the adjustment plate 24 away from the adjustment knob 23 is rotatably connected to the machine box 1;

[0046] The adjusting knob 23 is threadedly connected to the adjusting plate 24. By threading the outer side of the adjusting knob 23 at the bottom of the machine box 1, the adjusting knob 23 and the machine box 1 can be squeezed and fixed to each other, so that the adjusting plate 24 can be fixed, and the first gear 31 and the second gear 32 are symmetrically arranged on the lower surface of the adjusting plate 24 and mesh with each other. Through the meshing conversion of the second gear 32, the first gear 31 on the side of the adjusting plate 24 away from the adjusting knob 23 and the first gear 31 on the side close to the adjusting knob 23 can rotate in opposite directions.

[0047] Specifically, such as Figures 5 to 7 As shown, the middle portion of the first gear 31 is rotatably connected to the end of the adjustment plate 24 away from the adjustment knob 23. The tooth surface of the first gear 31 is meshed with the second gear 32. The first gear 31 and the second gear 32 are symmetrically meshed and arranged on the adjustment plate 24. The middle portion of the first gear 31 is fixedly connected to the transmission shaft, and the upper end of the transmission shaft is fixedly connected to the arc-shaped directional plate 34.

[0048] Among them, the push rod 33 and the arc-shaped directional plate 34 are symmetrically arranged at both ends of the adjustment plate 24, and the transmission shaft in the middle of the first gear 31 is evenly fixed. When the first gear 31 rotates, the transmission shaft synchronously drives the push rod 33 and the arc-shaped directional plate 34 to rotate synchronously around the middle of the first gear 31.

[0049] Further, if Figure 6 and Figure 7 As shown, a push rod 33 is fixedly connected to the upper surface of the arc-shaped directional plate 34, and a turntable 35 is rotatably connected to the middle part of the upper surface of the adjustment plate 24. An extrusion groove 36 is opened on the upper surface of the turntable 35, and arc-shaped directional grooves 37 are evenly opened on the outer periphery of the lower surface of the turntable 35. The outer periphery of the arc-shaped directional plate 34 slides in the arc-shaped directional groove 37; the push rod 33 slides in the extrusion groove 36 at the end away from the first gear 31, and an electric telescopic rod is fixedly connected to the middle part of the turntable 35, and a laser scanner 38 is installed at the end of the electric telescopic rod away from the turntable 35. An adjustment groove 39 is opened on the side of the machine box 1 close to the laser protective cover 11, and the outer surface of the electric telescopic rod is slidably connected to the adjustment groove 39, and the adjustment groove 39 is set in the laser protective cover 11;

[0050] Among them, by adjusting the rotation angle of the adjustment plate 24, the laser scanner 38 can be synchronously driven to perform angle fine-tuning control in the adjustment slot 39, wherein the curvature of the edge of the arc-shaped directional slot 37 is the same as the curvature inside the arc-shaped directional slot 37, and the end of the push rod 33 is fixedly connected to an extrusion block, and the outer circumference size of the extrusion block is adapted to the width of the extrusion slot 36 opened on the turntable 35.

[0051] In this solution, the laser scanner 38 starts to rotate back and forth 90 degrees when the protective door laser protective cover 11 is closed. By installing the laser scanner 38 in the laser protective cover 11, it is possible to reduce the scanning intensity caused by the adhesion of dust and impurities on the surface of the laser scanner 38. Compared with the traditional single fixed detection, this solution can not only cover the bottom and sides of both sides of the elevator to reduce blind spots, but also may need to be customized according to the size of the elevator door compared to the traditional fixed device. The design of this solution can adapt to elevator doors of different sizes and shapes. Through dynamic scanning, it can more accurately determine whether there is an obstacle, thereby reducing the malfunction of the elevator door due to false triggering.

[0052] Second embodiment

[0053] The method for implementing a 90-degree rotating scanning laser infrared radar safety light curtain device includes:

[0054] S1, adjust to zero:

[0055] Place the electronic theodolite on the elevator door and make it roughly horizontal. After tightening the connecting screw, set the horizontal angle of the machine box 1 to zero. When a straight line is drawn, the accuracy of the subsequent rotation of the laser scanner 38 to 90 degrees can be ensured.

[0056] S2, centering adjustment: Move the laser scanner 38 to its scanning coverage area so that the centering mark is accurately aligned with the center of the measuring station. After accurate adjustment, tighten the adjustment knob 23.

[0057] S3, equipment monitoring test; the infrared emitter installed in the laser protective cover 11 emits an infrared beam, and the central controller 12 is responsible for receiving the signal control transmitted by this beam. When the beam is blocked by an object, the laser scanner 38 transmits an electrical signal to the central controller 12, and the system is controlled by the central controller 12 to detect the abnormality and trigger an interrupt;

[0058] S3 specifically includes:

[0059] S3.1, Signal Processing: A machine box 1 is installed above both sides of the elevator door. Laser scanner 38 rotates to perform a 90-degree full-scale scan, effectively covering the upper, lower, left, and right areas on both sides of the elevator door. Simultaneously, a control system installed in central controller 12 analyzes the changes in the laser scanner 38 signal to determine whether an object or person has entered the protected area. The elevator door will then stop closing and reverse to open until the obstacle has cleared and the door closes normally.

[0060] S3.2, Safety Protection: For double-door elevators, the device can be installed symmetrically at the upper angles on both sides of the elevator door. For single-door elevators, it only needs to be installed on one side.

[0061] The specific implementation process of the above embodiment is as follows:

[0062] When using, such as Figure 4 As shown, first, the operator installs and fixes the machine box 1 along the measuring position on the inner side of the elevator door. At this time, since the outer surface of the adjusting knob 23 is slidably connected to the arc groove 22, the sliding position of the adjusting knob 23 in the arc groove 22 can be adjusted to adjust the adjusting plate 24 to drive the laser scanner 38 to achieve fine-tuning of the angle in the laser protective cover 11. Specifically, the scanning area of ​​the laser scanner 38 can be adjusted by adjusting the angle of the adjusting plate 24. In this solution, the angle of the monitoring equipment can be adjusted by setting it up, so that the monitoring equipment can be quickly debugged and fixed in the area after installation. In an environment with limited space and complex structure such as an elevator, the angle adjustment function can ensure that the light curtain can accurately cover the area to be monitored; by adjusting the scanning area of ​​the laser scanner 38, it can be ensured that the infrared rays can be more effectively irradiated on the target object, thereby improving the accuracy and reliability of the detection.

[0063] At the same time, in this solution, for double doors, a scanning device of this solution is set on one side above the double doors on both sides, and the starting scanning areas of the laser scanner 38 inside the double doors on both sides are opposite, that is, the scanning area on one side starts from the vertical direction of the car door and scans 90 degrees to the top of the car door, while the scanning area on the other side starts from 90 degrees above the car door and starts to describe in the vertical direction of the car door. This arrangement of the solution can reduce the blind area caused by the time difference generated by the laser scanner 38 in unilateral scanning;

[0064] Further, if Figure 5 As shown, since the first gear 31 is fixed to the motor drive shaft in this solution, the start of the motor is controlled by the central controller 12. At this time, the rotation of the first gear 31 at the bottom of the adjustment plate 24 away from the adjustment knob 23 will drive the meshing second gear 32 to rotate with each other, and the first gear 31 at the bottom of the adjustment plate 24 close to the adjustment knob 23 starts to rotate in the opposite direction through mutual engagement. Since the push rod 33 and the arc-shaped directional plate 34 are both fixed above the middle of the first gear 31, when the first gear 31 rotates, it will drive the push rod 33 to start synchronous rotation, as shown in FIG. Figure 5 As shown, the arc-shaped directional plate 34 controls the rotation of the turntable 35, and the push rod 33 controls the swing of the turntable 35. The push rods 33 on both sides of the adjustment plate 24 are symmetrically arranged with the arc-shaped directional plate 34. When the arc-shaped directional plate 34 on one side slides in the arc-shaped directional groove 37, the push rod 33 on the other side starts to squeeze the turntable 35, thereby realizing the reciprocating rotation of the turntable 35 and controlling the rotation of the turntable 35 at the same time. Compared with directly using a motor for reciprocating rotation, this solution not only has high mechanical transmission efficiency and low energy loss, and is suitable for long-term operation, but also can realize self-locking of the turntable 35 by sliding the arc-shaped directional plate 34 and the arc-shaped directional groove 37 when the turntable 35 stops rotating.

[0065] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0066] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

A 90-degree rotating scanning laser infrared radar safety light curtain device comprises a machine box (1), a laser protection cover (11) is installed in the middle of the upper surface of the machine box (1), and a central controller (12) is installed on the side of the upper surface of the machine box (1) close to the laser protection cover (11), characterized in that: It also includes an angle fine-tuning mechanism (2) and a reciprocating scanning mechanism (3); The angle fine-tuning mechanism (2) is arranged in the machine box (1), and the angle fine-tuning mechanism (2) is used for fine-tuning the angle of the scanning device; The reciprocating scanning mechanism (3) is arranged in the angle fine-tuning mechanism (2), and the reciprocating scanning mechanism (3) is used for the reciprocating rotation of the scanning device; The angle fine-tuning mechanism (2) comprises an arc-shaped plate (21), the arc-shaped plate (21) is fixedly connected to the machine box (1), an arc-shaped groove (22) is provided in the arc-shaped plate (21), and an adjusting knob (23) is slidably connected to the arc-shaped groove (22); One end of the adjusting knob (23) passes through the outer surface of the machine box (1), and the other end of the adjusting knob (23) is threadedly connected to the adjusting plate (24), and the adjusting plate (24) is rotatably connected to the machine box (1) at one end away from the adjusting knob (23); The reciprocating scanning mechanism (3) includes a first gear (31), the middle portion of the first gear (31) is rotatably connected to an end of the adjustment plate (24) away from the adjustment knob (23), the tooth surface of the first gear (31) is meshed with a second gear (32), the first gear (31) and the second gear (32) are symmetrically meshed and arranged on the adjustment plate (24), the middle portion of the first gear (31) is fixedly connected to a transmission shaft, and the upper end of the transmission shaft is fixedly connected to an arc-shaped directional plate (34); The machine box (1) is installed at an oblique angle above the door of a double-door elevator.

2. The 90-degree rotating scanning laser infrared radar safety light curtain device according to claim 1 is characterized in that: The upper surface of the arc-shaped orientation plate (34) is fixedly connected to a push rod (33), the middle portion of the upper surface of the adjustment plate (24) is rotatably connected to a turntable (35), the upper surface of the turntable (35) is provided with an extrusion groove (36), the outer periphery of the lower surface of the turntable (35) is evenly provided with arc-shaped orientation grooves (37), and the outer periphery of the arc-shaped orientation plate (34) slides in the arc-shaped orientation grooves (37).

3. The 90-degree rotating scanning laser infrared radar safety light curtain device according to claim 2 is characterized in that: The push rod (33) slides in the extrusion groove (36) at one end away from the first gear (31), an electric telescopic rod is fixedly connected to the middle of the turntable (35), and a laser scanner (38) is installed at one end of the electric telescopic rod away from the turntable (35), an adjustment groove (39) is opened on the side of the machine box (1) close to the laser protective cover (11), and the outer surface of the electric telescopic rod is slidably connected to the adjustment groove (39), and the adjustment groove (39) is set in the laser protective cover (11).

4. A method for implementing a 90-degree rotating scanning laser infrared radar safety light curtain device, applicable to the 90-degree rotating scanning laser infrared radar safety light curtain device according to any one of claims 1 to 3, characterized in that: include: S1, adjust and set to zero: place the electronic theodolite on the elevator door, make it level, and then tighten the connecting screw to set the horizontal angle of the machine box (1) to zero; S2, centering adjustment: the laser scanner (38) is moved to its scanning coverage area so that the centering mark is accurately aligned with the center of the measuring station. After accurate adjustment, the adjusting knob (23) is tightened; S3, equipment monitoring test; the central controller (12) is responsible for receiving the infrared beam emitted by the infrared transmitter installed in the laser protective cover (11), and the laser scanner (38) transmits an electrical signal to the central controller (12). Through the control of the central controller (12), the system detects an abnormality and triggers an interruption.

5. The method for implementing the 90-degree rotating scanning laser infrared radar safety light curtain device according to claim 4 is characterized in that: The S3 steps include: S3.1, the signal elevator car is arranged on both sides of the elevator door and the machine box (1) is installed above. The laser scanner (38) rotates to form an all-round scan within a range of 90 degrees, covering the upper, lower, left and right areas on both sides of the elevator door. The control system installed in the central controller (12) is used to analyze the signal changes of the laser scanner (38) and determine whether there is an object or a person entering the protection area.

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