Verification device and verification method for speed governor of elevator without machine room

Abstract

The invention relates to the field of elevator verification, and particularly discloses a verification device and a verification method for a speed governor of an elevator without a machine room. By arranging the speed acquisition part, the video recording part and the weight, when the speed governor of the elevator without the machine room is verified, the video recording part is installed in an elevator shaft and is aligned with the speed governor and the speed acquisition part to record the test process and result, the speed acquisition part is adsorbed on the speed governor, and finally, the weight is installed on a speed governor linkage rope through the clamping assembly, so that the speed governor of the elevator without the machine room is verified. The heavy block drags the linkage rope through gravity to drive the speed governor rope wheel to rotate, the speed collecting part measures the angular speed of the speed governor rope wheel, the dragging speed of the linkage rope on the speed governor is calculated according to the angular speed and serves as the moving speed of the elevator, and it is effective to observe the action speed of the speed governor at different dragging speeds of the linkage rope.

Description

Technical Field

[0001] The invention belongs to the technical field of elevator calibration, and in particular relates to a speed limiter calibration device and a calibration method for a machine room-less elevator. Background Art

[0002] The elevator speed limiter is one of the important components for elevator operation safety protection. It can effectively control the elevator speed, prevent the elevator from overspeeding, and prevent the occurrence of safety accidents. In order to ensure that the elevator speed limiter can function stably, it is necessary to conduct regular inspection of the speed limiter according to the inspection regulations.

[0003] At present, when the speed limiter is calibrated on site during the annual inspection, a speed limiter calibrator is mostly used for calibration. When using the speed limiter calibrator, the operator is required to hold the drive motor and press it on the speed limiter rope wheel. The power of the speed limiter calibrator drive motor drives the speed limiter rope wheel to rotate, and the motor accelerates to simulate the action speed. Since the machine room-less speed limiter is located at the top of the elevator shaft, the corresponding equipment is close to the shaft wall, resulting in extremely limited operating space, which is inconvenient for operators to carry out speed limiter calibration operations, and often requires the calibrator to lean out of the guardrail on the top of the car to operate. There is a risk of being hit or falling when performing calibration operations on the top of the car. At the same time, the calibrators currently on the market are all powered by AC220V, and there may be a safety risk of electric shock during operation.

[0004] It can be seen that there are many dangers in using traditional methods to calibrate the speed limiter of a machine roomless elevator, and the personal safety of the calibration personnel cannot be guaranteed. Therefore, it is necessary to design a machine roomless elevator speed limiter calibration method that can ensure the personal safety of the calibration personnel. Summary of the invention

[0005] In order to overcome the deficiencies of the prior art, the present invention aims to provide a device and method for checking a speed limiter of a machine room-less elevator, so as to solve the problem that the personal safety of the checking personnel cannot be guaranteed when checking a speed limiter of a machine room-less elevator using the traditional method.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] The speed limiter calibration device for machine room-less elevators includes:

[0008] A tool box, wherein the tool box is connected to a box cover and a handle, wherein a loading plate is connected inside the tool box, and a plurality of card slots are arranged on the loading plate;

[0009] A speed acquisition unit, arranged inside the card slot and used for detecting the speed of the elevator speed limiter;

[0010] A video recording unit, arranged inside the card slot, for recording the elevator speed limiter verification process by video;

[0011] The weight block is clamped in the clamping slot, and the weight block is provided with a clamping assembly connected with the elevator speed limiter linkage rope.

[0012] Preferably, the speed collection unit includes a laser emission sensor clamped inside the card slot, a laser emission receiving head fixedly installed on the side wall of the laser emission sensor, and a first magnetic sheet fixedly installed on the laser emission sensor, a first safety rope for preventing falling objects is arranged inside the laser emission sensor, a reflective sheet capable of reflecting the laser emitted by the laser emission receiving head is also clamped inside the card slot, and a second magnetic sheet is fixedly connected to the reflective sheet.

[0013] Preferably, the laser emission sensor is fixedly connected with a display screen for displaying collected data and a detection line for connecting to the speed limiter electrical switch. The laser emission sensor and the laser emission receiving head are separately arranged and connected by a connecting line.

[0014] Preferably, the video recording unit includes a camera connected to the card slot and a third magnetic sheet fixedly mounted on the camera, and a second safety rope for preventing falling objects is arranged inside the camera.

[0015] Preferably, a side wall of the weight block is provided with a slit, and the slit extends to the middle of the weight block, and the clamping assembly is arranged at an end of the slit.

[0016] Preferably, the clamping assembly includes two clamping blocks hinged on the weight block and a mounting block fixedly mounted on the weight block, a threaded rod is threadedly connected inside the mounting block, a stop block is rotatably connected to the end of the threaded rod, one end of the two clamping blocks is provided with a bayonet for the stop block to be inserted into, and a spring connected to the two clamping blocks is arranged inside the bayonet.

[0017] Preferably, a notch is formed in the side wall of the weight block, and a handle is provided in the notch.

[0018] Preferably, the laser emission sensor and the camera are both provided with lithium batteries for power supply.

[0019] The speed limiter calibration method for a machine room-less elevator is applied to a speed limiter calibration device for a machine room-less elevator, comprising:

[0020] The camera is attached to the inside of the elevator shaft through the third magnetic sheet, the second safety rope is connected to the elevator structure, and the camera lens is aimed at the elevator speed limiter;

[0021] The reflective sheet is adsorbed on one side of the elevator speed limiter rope wheel through the second magnetic sheet, and the measuring distance from the reflective sheet to the axis of the elevator speed limiter rope wheel is measured, and then the rope loop distance from the outer ring linkage rope of the elevator speed limiter rope wheel to the axis of the elevator speed limiter rope wheel is measured, and the measuring distance and the rope loop distance are input into the laser emission sensor;

[0022] The laser emission sensor is adsorbed on the side of the elevator speed limiter guide rail through the first magnetic sheet, and the laser emission receiving head is aligned with the reflective sheet;

[0023] Remove the linkage rope and safety clamp connection screws between the elevator speed limiter and the elevator, and fix the weight block to the end of the linkage rope on the safety clamp connection side through the clamp assembly;

[0024] Release the weight block, and the falling weight block drives the elevator speed limiter rope wheel to rotate through the linkage rope. The laser transmitter and receiver emits laser and receives the laser reflected back by the reflector. The laser emission sensor obtains the laser reflection interval time, and calculates the sliding speed of the linkage rope as the elevator sliding speed by combining the measured distance and the rope loop distance. Observe the action of the speed limiter and record the test results.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] The present invention provides a speed collection unit, a video recording unit and a weight block. When checking the speed limiter of the machine room-less elevator, the video recording unit is installed inside the elevator shaft to align with the speed limiter and the speed collection unit to record the test process and results. The speed collection unit is installed on the speed limiter. Finally, the weight block is installed on the speed limiter linkage rope through a clamping assembly. The weight block drives the speed limiter rope wheel to rotate by dragging the linkage rope by gravity. The speed collection unit measures the angular velocity of the speed limiter rope wheel, and the dragging speed of the linkage rope on the speed limiter is calculated from the angular velocity as the elevator moving speed, so as to observe whether the speed limiter works under different dragging speeds of the linkage rope. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0028] Figure 2 It is a schematic diagram of the internal structure of the tool box of the present invention;

[0029] Figure 3 It is a schematic diagram of the structure of the laser emission sensor of the present invention;

[0030] Figure 4 It is a schematic diagram of the structure of the reflector of the present invention;

[0031] Figure 5 It is a schematic diagram of the structure of the video camera of the present invention;

[0032] Figure 6 The weight block structure of the present invention is shown in FIG. Figure 1 ;

[0033] Figure 7 The weight block structure of the present invention is shown in FIG. Figure 2 ;

[0034] Figure 8 This is a structural diagram of the laser emission sensor and the laser emission receiving head being separately arranged in the present invention;

[0035] Fig. 9 It is a schematic diagram of the structure of the second weight block of the present invention;

[0036] Fig.10 It is a schematic diagram of the rope sleeve structure of the present invention;

[0037] In the figure: 1. tool box; 2. box cover; 3. handle; 4. loading plate; 5. card slot; 6. speed acquisition unit; 61. laser emission sensor; 62. laser emission receiving head; 63. first magnetic sheet; 64. first safety rope; 65. reflective sheet; 66. second magnetic sheet; 67. display screen; 68. detection line; 69. connecting line; 7. recording unit; 71. camera; 72. third magnetic sheet; 73. second safety rope; 8. weight block; 81. handle; 82. gap; 83. clamping block; 84. mounting block; 85. threaded rod; 86. stop block; 87. spring; 9. second weight block; 10. mounting slot; 11. connecting hole; 12. rope sleeve; 13. rope 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] Embodiment 1:

[0040] See also Figure 1 - Figure 8 As shown, the speed limiter calibration device for a machine room-less elevator comprises:

[0041] A tool box 1, wherein the tool box 1 is connected to a box cover 2 and a handle 3, wherein a loading plate 4 is connected inside the tool box 1, and wherein a plurality of card slots 5 are arranged on the loading plate 4;

[0042] A speed acquisition unit 6, arranged inside the card slot 5, is used to detect the speed of the elevator speed limiter;

[0043] A video recording unit 7, arranged inside the card slot 5, for recording the elevator speed limiter verification process by video;

[0044] The weight block 8 is clamped in the clamping slot 5, and the weight block 8 is provided with a clamping assembly connected to the elevator speed limiter linkage rope.

[0045] As can be seen from the above, by setting the speed acquisition unit 6, the video recording unit 7 and the weight 8, when the speed limiter of the machine roomless elevator is calibrated, the video recording unit 7 is installed inside the elevator shaft and aligned with the speed limiter, the speed acquisition unit 6 is installed on the elevator, and finally the weight 8 is installed on the speed limiter linkage rope through the clamping assembly. The weight 8 drives the speed limiter rope wheel to rotate by dragging the linkage rope by gravity. The speed acquisition unit 6 measures the angular velocity of the speed limiter rope wheel, and the dragging speed of the linkage rope on the speed limiter is calculated from the angular velocity as the elevator moving speed. It is observed whether the speed limiter works under different dragging speeds of the linkage rope. The whole set of equipment is placed inside the loading plate 4 inside the tool box 1, and the user can lift the tool box 1 by the handle 3 to move.

[0046] The speed collection unit 6 includes a laser emission sensor 61 clamped inside the card slot 5, a laser emission receiving head 62 fixedly installed on the side wall of the laser emission sensor 61, and a first magnetic attraction sheet 63 fixedly installed on the laser emission sensor 61. The first magnetic attraction sheet 63 is made of a strong magnet and is used for adsorption and fixation. A first safety rope 64 is provided inside the laser emission sensor 61 to prevent falling objects. A reflective sheet 65 capable of reflecting the laser emitted by the laser emission receiving head 62 is also clamped inside the card slot 5, and a second magnetic attraction sheet 66 is fixedly connected to the reflective sheet 65.

[0047] See also Figure 2 - Figure 4 As shown, when in use, the reflective sheet 65 can be adsorbed on the side of the elevator speed limiter rope wheel through the second magnetic sheet 66, and then the laser emission sensor 61 can be adsorbed on the elevator through the first magnetic sheet 63, and the laser emission receiving head 62 can be aligned with the reflective sheet 65 to ensure that the reflective sheet 65 can reflect the laser emitted by the laser emission receiving head 62, and at the same time ensure that the laser emission receiving head 62 can effectively receive the laser reflected by the reflective sheet 65. In order to prevent the laser emission sensor 61 from falling, the first safety rope 64 can be tied to the elevator structure.

[0048] Reference Figure 8In order to facilitate the recording unit 7 to accurately record the test process, the laser emission sensor 61 is fixedly connected with a display screen 67 for displaying collected data and a detection line 68 for connecting to the electrical switch of the speed limiter. The display screen 67 can display the measured speed in real time. The detection line 68 is connected to the electrical switch of the speed limiter and is used to detect the electrical switch of the speed limiter. The laser emission sensor 61 and the laser emission receiving head 62 are separately arranged and connected by a connecting line 69. When testing in some narrow scenes, the laser emission receiving head 62 can be installed separately at a suitable position on the speed limiter, and the data collected by the laser emission receiving head 62 will be fed back to the laser emission sensor 61 through the connecting line 69.

[0049] See also Figure 2 - Figure 5 As shown, the recording unit 7 includes a camera 71 that is clamped inside the card slot 5 and a third magnetic sheet 72 that is fixedly mounted on the camera 71 . A second safety rope 73 is provided inside the camera 71 to prevent falling objects.

[0050] The entire inspection process of the elevator needs to be operated by two people, one person operating and one person recording, which is rather troublesome. The recording unit 7 is used to replace the recording personnel for recording. Before the inspection work begins, the camera 71 can be adsorbed on a suitable position inside the elevator shaft through the third magnetic sheet 72, and the lens of the camera 71 is aimed at the speed limiter to record the entire inspection process of the speed limiter.

[0051] See also Figure 6 - Figure 7 As shown, a slit 82 is provided on the side wall of the weight block 8, and the slit 82 extends to the middle of the weight block 8, and the clamping assembly is arranged at the end of the slit 82. During verification, the linkage rope between the speed limiter and the elevator is disconnected, and then the linkage rope is clamped inside the slit 82, and then the linkage rope is clamped by the clamping assembly. At this time, the linkage rope is close to the center of gravity of the weight block 8, which can prevent the linkage rope from bending and deforming, making it easier for the weight block 8 to drag the linkage rope to move smoothly, thereby driving the speed limiter rope wheel to rotate.

[0052] The clamping assembly includes two clamping blocks 83 hinged on the weight block 8 and a mounting block 84 fixedly mounted on the weight block 8, the mounting block 84 is internally threadedly connected with a threaded rod 85, the end of the threaded rod 85 is rotatably connected with a stopper 86, one end of the two clamping blocks 83 is provided with a bayonet for the stopper 86 to be inserted into, and a spring 87 connected to the two clamping blocks 83 is arranged inside the bayonet.

[0053] When it is necessary to clamp the linkage rope, move the linkage rope between the two clamping blocks 83, rotate the threaded rod 85, so that the threaded rod 85 moves inside the mounting block 84, and the moving threaded rod 85 drives the stop block 86 to move. As the stop block 86 is inserted into the bayonet, the two clamping blocks 83 rotate to clamp the linkage rope and stretch the spring 87 at the same time. At this time, the linkage rope is stably connected to the weight block 8 through the clamping blocks 83. When releasing the linkage rope, reverse the threaded rod 85 to drive the stop block 86 to disengage from the bayonet, and the stretched spring 87 is reset to drive the clamping block 83 to rotate again. At this time, the clamping block 83 is no longer clamped on the linkage rope, and the linkage rope can be separated from the weight block 8.

[0054] The side wall of the weight block 8 is provided with a notch, and a handle 81 is provided at the notch portion, so that the user can move the weight block 8 through the handle 81 . The gravity of the weight block 8 is set to 200N.

[0055] The laser emission sensor 61 and the camera 71 are both provided with lithium batteries for power supply. The two devices are powered independently, so that the user can use the two devices separately.

[0056] See also Figure 1 - Figure 8 As shown, a speed limiter calibration method for a machine room-less elevator is applied to a speed limiter calibration device for a machine room-less elevator, comprising:

[0057] The camera 71 is adsorbed inside the elevator shaft through the third magnetic sheet 72, the second safety rope 73 is connected to the structure inside the elevator shaft, and the camera 71 lens is aimed at the elevator speed limiter;

[0058] The reflective sheet 65 is adsorbed on one side of the elevator speed limiter rope wheel through the second magnetic sheet 66, and the measuring distance from the reflective sheet 65 to the axis of the elevator speed limiter rope wheel is measured, and then the rope loop distance from the outer ring linkage rope of the elevator speed limiter rope wheel to the axis of the elevator speed limiter rope wheel is measured, and the measuring distance and the rope loop distance are input into the laser emission sensor 61;

[0059] The laser emission sensor 61 is adsorbed on the side of the elevator speed limiter guide rail through the first magnetic sheet 63, and the laser emission receiving head 62 is aligned with the reflective sheet 65;

[0060] Remove the linkage rope and safety clamp connection screws between the elevator speed limiter and the elevator, and fix the weight 8 to the end of the linkage rope on the safety clamp connection side through the clamping assembly;

[0061] Release the weight 8. The falling weight 8 drives the elevator speed limiter rope wheel to rotate through the linkage rope. The laser transmitting and receiving head 62 emits a laser and receives the laser reflected back by the reflective sheet 65. The laser transmitting sensor 61 obtains the laser reflection interval time, and calculates the sliding speed of the linkage rope as the elevator sliding speed in combination with the measured distance and the rope loop distance. Observe the action of the speed limiter and record the test results.

[0062] Example 2:

[0063] The technical features of this embodiment different from those of Embodiment 1 are as follows:

[0064] Referring to Figure 9-10 , the second weight 9 can be used to replace the function of the weight 8. The second weight 9 is integrally spindle-shaped, and an installation groove 10 in the shape of a Chinese character 'zhong' is arranged inside the second weight 9. A rope sleeve 12 is arranged inside the installation groove 10, and a rope groove 13 is arranged inside the rope sleeve 12. When in use, the user can clamp the linkage rope inside the rope groove 13 in the middle of the rope sleeve 12, then snap the rope sleeve 12 with the clamped linkage rope into the installation groove 10 of the second weight 9, and finally combine the second weight 9 through bolts and connection holes 11, so that the second weight 9 can be stably installed on the linkage rope to function.

[0065] All standard parts used in the present invention can be purchased from the market. Special-shaped parts can be customized according to the descriptions in the specification and the drawings. The specific connection methods of each part all adopt conventional means such as bolts, rivets, and welding that are mature in the prior art. The machines, parts, and equipment all adopt conventional models in the prior art. In addition, the circuit connection adopts a conventional connection method in the prior art, which will not be elaborated here. Contents not described in detail in this specification all belong to the prior art well-known to those skilled in the art.

[0066] In the description of the present invention, the terms 'first' and'second' are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with 'first' and'second' may explicitly or implicitly include one or more of such features. The meaning of'multiple' is two or more, unless otherwise specifically defined.

[0067] In the present invention, unless otherwise clearly specified and limited, the terms such as 'installation', 'connection', 'connection', and 'fixation' should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0068] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0069] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0070] In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other.

Claims

1. A speed governor calibration device for a machine room-less elevator, characterized in that: include: A tool box (1), wherein the tool box (1) is connected to a box cover (2) and a handle (3), and the tool box (1) is internally connected to a loading plate (4), and the loading plate (4) is provided with a plurality of card slots (5); A speed acquisition unit (6), arranged inside the card slot (5) and used for detecting the speed of the elevator speed limiter; A video recording unit (7) is arranged inside the card slot (5) and is used for recording the elevator speed limiter verification process by video; A weight block (8) is clamped inside the clamping slot (5), and a clamping assembly connected to a linkage rope of an elevator speed limiter is arranged on the weight block (8).

2. The speed governor calibration device for a machine room-less elevator according to claim 1, characterized in that: The speed acquisition unit (6) comprises a laser emission sensor (61) clamped inside the card slot (5), a laser emission receiving head (62) fixedly mounted on the side wall of the laser emission sensor (61), and a first magnetic attraction sheet (63) fixedly mounted on the laser emission sensor (61); a first safety rope (64) for preventing falling objects is arranged inside the laser emission sensor (61); a reflective sheet (65) capable of reflecting laser light emitted by the laser emission receiving head (62) is also clamped inside the card slot (5); and a second magnetic attraction sheet (66) is fixedly connected to the reflective sheet (65).

3. The speed governor calibration device for a machine room-less elevator according to claim 2, characterized in that: The laser emission sensor (61) is fixedly connected with a display screen (67) for displaying collected data and a detection line (68) for connecting to a speed limiter electrical switch. The laser emission sensor (61) is separately arranged from the laser emission receiving head (62) and is connected via a connecting line (69).

4. The speed governor calibration device for a machine room-less elevator according to claim 1, characterized in that: The video recording unit (7) comprises a camera (71) clamped inside the card slot (5) and a third magnetic attraction sheet (72) fixedly mounted on the camera (71); a second safety rope (73) for preventing falling objects is arranged inside the camera (71).

5. The speed governor calibration device for a machine room-less elevator according to claim 1, characterized in that: A slit (82) is provided on the side wall of the weight block (8), and the slit (82) extends to the middle of the weight block (8), and the clamping assembly is arranged at the end of the slit (82).

6. The speed governor calibration device for a machine room-less elevator according to claim 1, characterized in that: The clamping assembly comprises two clamping blocks (83) hinged on the weight block (8) and a mounting block (84) fixedly mounted on the weight block (8); a threaded rod (85) is internally threadedly connected to the mounting block (84); a stopper (86) is rotatably connected to the end of the threaded rod (85); one end of the two clamping blocks (83) is provided with a socket for the stopper (86) to be inserted into; a spring (87) connected to the two clamping blocks (83) is arranged inside the socket.

7. The speed governor calibration device for a machine room-less elevator according to claim 1, characterized in that: The side wall of the weight block (8) is provided with a notch, and a handle (81) is provided at the notch.

8. The speed governor calibration device for a machine room-less elevator according to claims 2-4, characterized in that: The laser emission sensor (61) and the camera (71) are both provided with lithium batteries for power supply.

9. A method for checking a speed governor of a machine-room-less elevator, applied to a device for checking a speed governor of a machine-room-less elevator according to any one of claims 1 to 8, characterized in that: include: The camera (71) is adsorbed inside the elevator shaft through the third magnetic sheet (72), the second safety rope (73) is connected to the structure inside the elevator shaft, and the camera (71) is aimed at the elevator speed limiter; The reflective sheet (65) is adsorbed on one side of the elevator speed limiter rope wheel through the second magnetic sheet (66), and the measuring distance from the reflective sheet (65) to the axis of the elevator speed limiter rope wheel is measured, and then the rope loop distance from the outer ring linkage rope of the elevator speed limiter rope wheel to the axis of the elevator speed limiter rope wheel is measured, and the measuring distance and the rope loop distance are input into the laser emission sensor (61); The laser emission sensor (61) is adsorbed on the guide rail side of the elevator speed limiter through the first magnetic attraction sheet (63), and the laser emission receiving head (62) is aligned with the reflection sheet (65); Remove the linkage rope and the safety clamp connection screws between the elevator speed limiter and the elevator, and fix the weight (8) to the end of the linkage rope on the safety clamp connection side through the clamping assembly; The weight (8) is released, and the falling weight (8) drives the elevator speed limiter rope wheel to rotate through the linkage rope. The laser emission receiving head (62) emits laser and receives the laser reflected back through the reflective sheet (65). The laser emission sensor (61) obtains the laser reflection interval time, and calculates the sliding speed of the linkage rope as the elevator sliding speed by combining the measured distance and the rope loop distance. The speed limiter action is observed and the test results are recorded.

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