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

Abstract

The invention discloses a 90-degree rotary scanning laser infrared radar safety light curtain device and an implementation method thereof, and relates to the technical field of elevator light curtains, the 90-degree rotary scanning laser infrared radar safety light curtain device comprises a machine box, a laser protective cover is mounted in the middle of the upper surface of the machine box, a central controller is mounted on one side, close to the laser protective cover, of the upper surface of the machine box, and the 90-degree rotary scanning laser infrared radar safety light curtain device further comprises an angle fine adjustment mechanism and a reciprocating scanning mechanism; according to the scheme, the laser scanner starts to rotate by 90 degrees in a reciprocating mode when the laser protective cover is closed through the protective door, the laser scanner is installed in the laser protective cover, the situation that the scanning intensity is reduced due to the fact that dust and impurities are attached to the surface of the laser scanner can be reduced, and compared with traditional single fixed detection, the detection efficiency is improved. According to the scheme, the bottoms and the side edges of the two sides of the elevator can be covered, blind areas are reduced, the elevator door detection device can adapt to elevator doors of different sizes and shapes through the design of the scheme, whether obstacles exist or not can be more accurately judged through dynamic scanning, and elevator door misoperation caused by false triggering is reduced.

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 forms one or more light curtains by emitting laser beams and infrared rays to provide all-round 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 execute 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 when they are installed, 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 are of 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, so they cannot adapt to more types of elevator doors, which affects 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 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 is installed in the middle of the upper surface of the machine box, a central controller is installed on the upper surface of the machine box close to the laser protective cover, and also includes 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 comprises an arc-shaped plate, the arc-shaped plate is fixedly connected in the machine box, an arc-shaped groove is provided in the arc-shaped plate, and an adjusting knob is slidably connected in 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 part 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 implementation method of the 90-degree rotating scanning laser infrared radar safety light curtain device comprises:

[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 subsequent rotation of the laser scanner to 90 degrees can be ensured.

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

[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 arranged on both sides of the elevator door. The machine box is installed above. The laser scanner rotates to form a full range of scanning 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 signal changes of the laser scanner 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 car 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 scanning intensity caused by the adhesion of dust and impurities on the surface of the laser scanner, but also reduce blind spots compared to the traditional single fixed detection. Compared with the traditional fixed device, it may need to be customized according to the size of the elevator door. Through the design of this solution, it can 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 caused by 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 scheme, for double doors, the scanning device of this scheme is set 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, and the scanning area on the other side starts from the vertical direction of the car door 90 degrees above the car door to the box door. Through the setting of this scheme, the blind area caused by the time difference caused by the laser scanner in the single-sided scanning can be reduced; 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 It 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 It is a schematic diagram of the structural connection relationship of the reciprocating scanning mechanism of the present invention;

[0032] Figure 6 It 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 figure:

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

[0036] 2. Angle fine-tuning mechanism; 21. Arc plate; 22. Arc groove; 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 be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0039] The present invention is further described in detail below based on the accompanying drawings and embodiments.

[0040] First embodiment

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

[0042] In order 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 protective 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 close to the laser protective cover 11, and also includes an angle fine-tuning mechanism 2 and a reciprocating scanning mechanism 3;

[0043] 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;

[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, 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 opened in the arc plate 21, and an adjusting knob 23 is slidably connected in the arc 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 end of the adjusting plate 24 away from the adjusting 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 can rotate in opposite directions to the first gear 31 on the side close to the adjusting knob 23.

[0047] Specifically, Figures 5 to 7 As shown, the middle part 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 part 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, a turntable 35 is rotatably connected to the middle 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, and 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 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;

[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 arc angle of the edge of the arc-shaped directional slot 37 is the same as the inner arc angle of the arc-shaped directional slot 37, and an extrusion block is fixedly connected to the end of the push rod 33, 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 not only 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 the elevator on both sides 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 caused by false triggering.

[0052] Second embodiment

[0053] The implementation method of the 90-degree rotating scanning laser infrared radar safety light curtain device comprises:

[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 transmitter 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 these beams. When the beam is blocked by an object, the laser scanner 38 transmits an electrical signal to the central controller 12, and the system detects an abnormality and triggers an interruption through the control of the central controller 12;

[0058] S3 specifically includes:

[0059] S3.1, signal processing: a machine box 1 is installed on both sides of the elevator door, and the laser scanner 38 is rotated to form a full range of scanning within a range of 90 degrees, 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 12 analyzes the signal changes of the laser scanner 38 to determine whether there is an object or a person entering the protection area. The elevator door will stop closing and reverse to open until it closes normally after the obstacle leaves;

[0060] S3.2, Safety protection: For double-door elevators, it can be installed symmetrically at the upper angles on both sides of the elevator car 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, 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 in the arc groove 22, the adjusting plate 24 can be adjusted by adjusting the sliding position of the adjusting knob 23 in the arc groove 22 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 scheme, the angle of the monitoring device can be adjusted by setting, so that the monitoring device can be quickly debugged and fixed in the area after installation. In an environment such as an elevator with limited space and complex structure, 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 infrared rays can be more effectively irradiated onto the target object, thereby improving the accuracy and reliability of detection.

[0063] At the same time, in this scheme, for the double doors, the scanning device of this scheme is set on one side above the double doors on both sides, and the starting scanning area of ​​the laser scanner 38 inside the double doors on both sides is 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, and the scanning area on the other side starts from the top of the car door and starts to describe the car door vertically. Through the setting of this scheme, the blind area caused by the time difference caused by the laser scanner 38 in the single-sided scanning can be reduced;

[0064] Further, if Figure 5 As shown, since the first gear 31 is fixed to the motor drive shaft in this solution, the motor is started under the control of the central controller 12. At this time, the first gear 31 at the bottom of the adjusting plate 24 away from the adjusting knob 23 rotates to drive the meshing second gear 32 to rotate with each other, and the first gear 31 at the bottom of the adjusting plate 24 close to the adjusting knob 23 starts to rotate in the opposite direction through mutual meshing. Since the push rod 33 and the arc-shaped directional plate 34 are fixed above the middle of the first gear 31, when the first gear 31 rotates, it drives 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, so that the turntable 35 can be reciprocated and the turntable 35 can be controlled to rotate. 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 achieve 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 article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0066] Although 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 the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A 90-degree rotating scanning laser infrared radar safety light curtain device, comprising a machine box (1), a laser protection cover (11) being installed in the middle of the upper surface of the machine box (1), and a central controller (12) being 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-adjustment mechanism (2) is arranged in the machine box (1), and the angle fine-adjustment mechanism (2) is used for fine-adjusting 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.

2. The 90-degree rotating scanning laser infrared radar safety light curtain device according to claim 1 is characterized in that: The angle fine-adjusting mechanism (2) comprises an arc-shaped plate (21), the arc-shaped plate (21) is fixedly connected in 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 in the arc-shaped groove (22).

3. The 90-degree rotating scanning laser infrared radar safety light curtain device according to claim 2 is characterized in that: One end of the adjusting knob (23) penetrates the outer surface of the machine box (1), and the other end of the adjusting knob (23) is threadedly connected to an adjusting plate (24); the end of the adjusting plate (24) away from the adjusting knob (23) is rotatably connected to the machine box (1).

4. The 90-degree rotating scanning laser infrared radar safety light curtain device according to claim 3 is characterized in that: The reciprocating scanning mechanism (3) comprises 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).

5. The 90-degree rotating scanning laser infrared radar safety light curtain device according to claim 4 is characterized in that: The upper surface of the arc-shaped orientation plate (34) is fixedly connected with a push rod (33), the middle part of the upper surface of the adjustment plate (24) is rotatably connected with 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).

6. The 90-degree rotating scanning laser infrared radar safety light curtain device according to claim 5 is characterized in that: The end of the push rod (33) away from the first gear (31) slides in the extrusion groove (36), the middle of the turntable (35) is fixedly connected with an electric telescopic rod, and the end of the electric telescopic rod away from the turntable (35) is installed with a laser scanner (38), the machine box (1) is provided with an adjustment groove (39) on the side close to the laser protective cover (11), and the outer surface of the electric telescopic rod is slidably connected in the adjustment groove (39), and the adjustment groove (39) is arranged in the laser protective cover (11).

7. A method for implementing a 90-degree rotating scanning laser infrared radar safety light curtain device is applicable to the 90-degree rotating scanning laser infrared radar safety light curtain device described in any one of claims 1 to 6, characterized in that: include: S1, zero adjustment: the electronic theodolite is placed on the elevator door, the connection screw is tightened after the electronic theodolite is leveled, and the horizontal angle of the machine box (1) is zeroed; 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, and the adjustment knob (23) is tightened after accurate adjustment; S3, equipment monitoring test; the central controller (12) is responsible for receiving the infrared light beam emitted by the infrared transmitter installed in the laser protection 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.

8. The method for implementing the 90-degree rotating scanning laser infrared radar safety light curtain device according to claim 7 is characterized in that: The S3 steps include: S3.1, the signal elevator car is arranged with a machine box (1) installed above the elevator car door on both sides, and 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) to determine whether there is an object or a person entering the protection area. S3.2, Safety protection: The double doors of the elevator are installed at the upper angles on both sides of the door, and the single door only needs to be installed on one side.

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