Steel wire rope broken wire and strand break sensor and elevator steel wire rope detection device

Abstract

The present invention discloses a wire rope broken wire and broken strand sensor, which includes a detection ring, a beam generation receiver, and a conductive transmission member. A detection channel surrounding the center of the detection ring is provided inside the detection ring. The center of the detection ring allows the wire rope to pass through. A reflective film is formed on the outer surface of the inner ring wall of the detection ring or the inner ring wall of the detection ring is made of a reflective film, and the reflective film forms a reflection surface on the inner surface of the inner ring wall. There are several beam generation receivers, which are respectively installed in the detection channel at a certain interval along the circumferential direction of the detection ring. Each beam generation receiver emits a beam to the opposite reflection surface and receives the beam reflected by the reflection surface. The conductive transmission member is electrically connected to the beam generation receiver, supplies power to the beam generation receiver, and transmits the beam signal received by the beam generation receiver outside the detection ring. Compared with the prior art, the present invention can detect the broken wire and broken strand of the wire rope in time, safely and accurately. The present invention also discloses an elevator wire rope detection device.

Description

Technical Field

[0001] The invention relates to safety detection, in particular to a wire rope broken wire and strand sensor and an elevator wire rope detection device. Background Art

[0002] Most of today's passenger elevators and freight elevators use steel wire ropes for vertical lifting. However, the steel wire ropes are often worn out during use, causing wire and strand breakage. The wires break first, then the strands, and eventually the entire wire rope breaks. This can cause safety hazards when using the elevator. A single broken wire rope can cause the car to tilt. The broken wire rope can slip out of the groove and get caught in the guide wheel or get entangled around the car, causing a serious malfunction of the elevator. Multiple breaks can easily cause the car to fall and cause a safety accident.

[0003] Referring to Chinese patent CN201621250882, a wire rope broken strand detection device is disclosed, which includes an annular detection piece, which is installed on a fixed seat, and a proximity switch is provided at the connection position. When the wire rope is broken, the wire rope collides with the annular detection piece to trigger the proximity switch. However, this detection device can only detect the broken strands of the wire rope, and cannot detect the broken wires of the wire rope in time.

[0004] Therefore, in order to find out the problem before the wire rope breaks and replace it in advance to avoid safety accidents, we need to design a solution to detect broken wires and strands of the wire rope, detect the broken wires and strands of the wire rope, and issue an early warning before the wire rope breaks. Summary of the invention

[0005] The purpose of the present invention is to provide a wire rope broken wire and strand broken sensor and detection device, which can detect the wire and strand broken of the wire rope in time, safely and accurately.

[0006] In order to achieve the above-mentioned purpose, the present invention discloses a wire rope broken wire and strand sensor, comprising a detection ring, a light beam generating receiver, and a conductive transmission component, the center of the detection ring is for the wire rope to pass through, a detection channel surrounding the center of the detection ring is arranged inside the detection ring, the side walls of the detection channel are opaque, a reflective film is formed on the outer surface of the inner ring wall of the detection ring or the inner ring wall of the detection ring is made of a reflective film, and the reflective film forms a reflective surface on the inner surface of the inner ring wall; there are a plurality of light beam generating receivers and they are respectively installed in the detection channel at a certain interval along the circumference of the detection ring, each of the light beam generating receivers emits a light beam to a reflective surface located opposite to the reflective surface, and receives a light beam reflected by the reflective surface; the conductive transmission component is electrically connected to the light beam generating receiver, supplies power to the light beam generating receiver, and transmits the light beam signal received by the light beam generating receiver to the outside of the detection ring.

[0007] Compared with the prior art, the present invention forms a light-shielding channel inside the detection ring, and a reflective film is provided on the outer surface of the inner ring wall of the detection ring. The reflective film forms a reflective surface exposed on the inner side of the light-shielding channel. The integrity of the reflective surface is detected by a light beam generator and receiver through light to determine whether the reflective film is damaged. Due to the easy destructibility of the reflective film, when the steel wire rope breaks or strands, the broken steel wires or strands are likely to cut through the reflective film to damage the reflective surface, which can be detected in time by the light beam generator and receiver, so as to detect the problems of broken wires and strands in time. Moreover, the structure of the detection ring is simple. When it is damaged, it can be repaired by coating or pasting the reflective film, with low cost and reusable.

[0008] Preferably, the inner ring wall is a light-transmitting wall made of a light-transmitting material, and the reflective film is pasted or formed on the outer surface of the light-transmitting wall.

[0009] Preferably, the inner ring wall is a grid plate, and the reflective film is attached to the outer surface of the grid plate.

[0010] Preferably, the reflective film is a tin film, aluminum foil, tin foil, silver film, aluminum film or laser film.

[0011] Preferably, a first light-shielding plate is provided between two adjacent light beam generators and receivers, and the first light-shielding plate isolates the light beams of the two light beam generators and receivers.

[0012] Preferably, the light beam generator and receiver includes a light-emitting tube and a light-receiving tube, and a second light-shielding plate is isolated between the light-emitting tube and the light-receiving tube.

[0013] Specifically, the light-emitting tube and the light-receiving tube are arranged along the axial direction of the detection ring or along the circumferential direction of the detection ring, and the second light-shielding plate is correspondingly perpendicular to the axial direction or correspondingly parallel to the axial direction.

[0014] Preferably, the outer surface of the inner ring wall is concave arc-shaped, so that the reflective surface is concave arc-shaped.

[0015] Preferably, the detection ring is formed by splicing at least two annular segments around the axial direction.

[0016] Specifically, the steel wire rope broken wire and strand sensor further includes a fixing piece. Splicing interfaces that can cooperate with each other are provided at the ends of adjacent annular segments. The fixing piece is arranged at the splicing position of the adjacent annular segments and is fixed to the two adjacent annular segments respectively.

[0017] The present invention also discloses an elevator steel wire rope detection device. The elevator includes a car, a counterweight, a traction drive wheel, and a steel wire rope. One end of the steel wire rope is connected to the car, the other end is connected to the counterweight, and it is arranged around the traction drive wheel. The elevator steel wire rope detection device includes a broken wire and broken strand sensor and a detection and processing unit. There are at least two broken wire and broken strand sensors, which are respectively installed outside the traction drive wheel. The broken wire and broken strand sensor is as described above, and the steel wire rope passes through the central hole of the detection ring of the broken wire and broken strand sensor; the detection and processing unit is electrically connected to the conductive transmission member of each broken wire and broken strand sensor to obtain the beam signal, and judges whether the steel wire rope is broken or has broken strands according to the intensity of the beam signal. If so, a broken wire and broken strand signal is output.

[0018] Preferably, the elevator includes a car, a counterweight, a traction drive wheel, and a steel wire rope. One end of the steel wire rope is connected to the car, the other end is connected to the counterweight, and it is arranged around the traction drive wheel; there are at least two broken wire and broken strand sensors, which are respectively installed outside the traction drive wheel. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a structural diagram of the steel wire rope broken wire and broken strand sensor of the present invention.

[0020] Figure 2 is a partial cross-sectional view of the steel wire rope broken wire and broken strand sensor of the present invention.

[0021] Figure 3a is a schematic diagram of the principle of the steel wire rope broken wire and broken strand sensor of the present invention from one angle.

[0022] Figure 3b is a schematic diagram of the principle of the steel wire rope broken wire and broken strand sensor of the present invention from another angle.

[0023] Figures 4a and 4b are schematic diagrams of the operation of the steel wire rope broken wire and broken strand sensor of the present invention.

[0024] Figure 5 is a structural diagram of the steel wire rope broken wire and broken strand sensor in a preferred embodiment of the present invention.

[0025] Figures 6a and 6b are schematic diagrams of the installation positions of the steel wire rope broken wire and broken strand sensor in an embodiment of the present invention.

[0026] Figures 6c and 6d are schematic diagrams of the installation positions of the steel wire rope broken wire and broken strand sensor in another embodiment of the present invention.

[0027] Figure 7 is a schematic diagram of the structure of the elevator steel wire rope detection device of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0028] To describe in detail the technical content, structural features, achieved objectives and effects of the present invention, the following will be described in detail in conjunction with the embodiments and with reference to the drawings.

[0029] Referring to Figure 1 and Figure 2 The present invention discloses a wire rope broken wire and broken strand sensor 10, including a detection ring 11, a beam generation and receiver 15, and a conductive transmission member 13. The center of the detection ring 11 is available for the wire rope 20 to pass through. A detection channel 14 surrounding the center of the detection ring is provided inside the detection ring 11. The side wall of the detection channel is light-impermeable, and the detection channel 14 is a light-impermeable channel. A reflective film 112 is formed on the outer surface of the inner ring wall 111 of the detection ring 11, and the reflective film 112 forms a reflecting surface 113 on the inner surface of the inner ring wall 111.

[0030] A plurality of the beam generation and receivers 15 are respectively installed in the detection channel 14 at a certain interval along the circumferential direction of the detection ring 11. Each beam generation and receiver 15 emits a beam to the opposite reflecting surface 113 and receives the beam reflected by the reflecting surface 113; the conductive transmission member 13 is electrically connected to the beam generation and receiver 15, supplies power to the beam generation and receiver 15, and conveys the beam signal received by the beam generation and receiver 15 outside the detection ring 11. In this embodiment, there are eight beam generation and receivers 15. Of course, the number of beam generation and receivers 15 can also be 5, 6, 7, 9, etc., and it is preferably greater than or equal to 4.

[0031] Referring to Figure 2 the inner ring wall 111 is a light-transmitting wall made of a light-transmitting material, and the reflective film 112 is pasted or formed on the outer surface of the light-transmitting wall. In this embodiment, the inner ring wall 111 is a continuous wall without grooves or through holes.

[0032] In this embodiment, except for the inner ring wall 111 of the detection ring 11, other ring walls can be directly made of a light-shielding material (or light-impermeable material), or a light-shielding film or light-absorbing film can be respectively coated on the inner and outer surfaces of other ring walls.

[0033] Of course, different from this embodiment, the inner ring wall 111 can also be directly made of a reflective film. Preferably, based on this embodiment, a grid plate or grid support is supported inside the inner ring wall 111, and the grid support is preferably made of a light-transmitting material.

[0034] Among them, the reflective film is a film such as a tin film, aluminum foil, tin foil, silver film, aluminum film or laser film, etc., which has reflectivity, is stable in the normal static state, and is easily scratched and brittle. The tin film can be a tin-plated film or a coated tin film, with low cost and easy to repair. The silver film and aluminum film can also be electroplated or evaporated metal films, or films made by other methods.

[0035] Preferably, referring to Figure 2 , a first light-shielding plate 114 is disposed between two adjacent light beam receivers 15, and the first light-shielding plate 114 isolates the light beams of the two light beam receivers 15. The first light-shielding plate 114 can divide the detection channel 14 into several detection spaces, or can semi-isolate the detection channel 14.

[0036] Referring to Figure 3a and Figure 3b , the light beam receiver 15 includes a light-emitting tube 151 and a light-receiving tube 152, and a second light-shielding plate 115 is isolated between the light-emitting tube 151 and the light-receiving tube 152. The second light-shielding plate 115 separates the positions of the light-emitting tube 151 and the light-receiving tube 152, and does not separate the detection channel 14. The second light-shielding plate 115 can be installed on the carrier plate for installing the light beam receiver 15, or can directly serve as the carrier plate for installing the light beam receiver 15.

[0037] Among them, the first light-shielding plate 114 and the second light-shielding plate 115 can be non-transparent plates, can be light-absorbing plates, or can be reflective plates, and preferably a light-absorbing plate.

[0038] Referring to Figure 3b , the light-emitting tube 151 and the light-receiving tube 152 are arranged in parallel along the axial direction of the detection ring 11. Of course, the light-emitting tube 151 and the light-receiving tube 152 can also be arranged in parallel along the circumferential direction. The installation positions of the light-emitting tube 151 and the light-receiving tube 152 can be set according to the shape and position of the reflecting surface 113, and their installation positions are not limited to being parallel. Those skilled in the art can set them based on the ease of emission of the light-emitting tube 151 and the ease of reception of the light-receiving tube 152. In order to facilitate the emission and reception of light, auxiliary optical elements can also be provided on the light-emitting tube 151 and the light-receiving tube 152 to adjust the light emission direction. In this embodiment, the light-emitting tube 151 is a light-emitting diode, which has a simple structure and low cost.

[0039] Referring to Figure 3b , the reflecting surface 113 is in a concave arc shape to facilitate the reflection of light into the light-receiving tube 152. Among them, the outer surface of the inner ring wall 111 is in a concave arc shape along its axial direction, so that the reflecting surface 113 is a corresponding concave arc shape. Of course, the outer surface of the inner ring wall 111 can also be other shapes to help form other reflecting surfaces 113 that are easy to reflect and converge light to the light-receiving tube 152.

[0040] Referring to Figure 1 and Figure 2, the detection ring 11 is formed by splicing at least two annular segments 101 around the axial direction. In this solution, the detection ring 11 installs the steel wire rope 20 into the central hole of the detection ring 11 from both sides of the steel wire rope 20. The annular segment 101 can be an integrally formed part or a splicing part formed by splicing two upper and lower cover plates together. The annular segment 101 can be made by injection molding or other processes with the same material, or can be made by injection molding or other processes with multiple materials.

[0041] Of course, referring to FIG. 5, the detection ring can also be formed by the cooperation and connection of an upper ring cover and a lower ring cover arranged along the axial direction. During installation, the steel wire rope 20 needs to pass through the central hole of the detection ring 11.

[0042] Refer to Figure 1 and Figure 2 , the steel wire rope broken wire and broken strand sensor 10 further includes a fixing piece 16. The ends of adjacent annular segments 101 are provided with splicing interfaces 18 that can cooperate with each other. The fixing piece 16 is arranged at the splicing place of the adjacent annular segments 101 and is fixed to the two adjacent annular segments 101 respectively. The splicing interface 18 is a clamping component with concave-convex cooperation.

[0043] Refer to Figure 2 , in this embodiment, the splicing interface 18 of each annular segment 101 respectively includes two splicing plates. The first splicing plate is provided with a plugging protrusion 181, and the second splicing plate is provided with a plugging concave hole that matches the shape and position of the splicing protrusion 181. When the two annular segments 101 are spliced, the first splicing plate of one annular segment 101 cooperates with the second splicing plate of the other annular segment 101, so that the plugging protrusion 181 is plugged into the plugging concave hole for positioning. Among them, the splicing plate of the splicing interface 18 is a light-shielding plate, and this light-shielding plate also separates the beam receivers 15 of the adjacent two annular segments 101.

[0044] Refer to Figure 1 and Figure 2 , the steel wire rope broken wire and broken strand sensor 10 further includes a fixing bracket 17 arranged outside the detection ring 11. The detection ring 11 is fixed to the relevant structure of the elevator through the fixing bracket 17.

[0045] Among them, the conductive transmission member 13 is a transmission line, which includes a power line and a signal line. The core bundle of this transmission line can be 4 cores (2 power lines, 2 signal lines), 5 cores (2 power lines, 2 signal lines, 1 ground line), 6 cores (2 power lines, 3 signal lines: open or normally closed output, 1 ground line), or other structures.

[0046] Referring to FIGS. 6a and 6b, the elevator used in the present invention includes a car 30, a counterweight 40, a traction drive wheel (traction wheel 51), and a steel wire rope 20. One end of the steel wire rope 20 is connected to the car 30, the other end is connected to the counterweight 40, and is arranged around the traction drive wheel (traction wheel 51).

[0047] Reference Figure 7 Figure 7 , the present invention also discloses an elevator steel wire rope detection device 100. The elevator steel wire rope detection device 100 includes a broken wire and broken strand sensor 10 and a detection and processing unit 60. Referring to FIGS. 6a and 6b, there are at least two broken wire and broken strand sensors 10, which are respectively installed outside the traction drive wheel (traction wheel 51) to detect the broken wire and broken strand conditions of the steel wire rope 20 in the area outside the traction drive wheel. The steel wire rope 20 passes through the central hole (ring center) of the detection ring 11 of the broken wire and broken strand sensor 10; the detection and processing unit 60 is electrically connected to the conductive transmission member 13 of each broken wire and broken strand sensor 10 to obtain the beam signal, compare the beam signal with a preset value, and output a broken wire and broken strand signal when the beam signal is lower than the preset value. Among them, the detection and processing unit is electrically connected to the conductive transmission member of each broken wire and broken strand sensor to obtain the beam signal, and judges whether the steel wire rope is broken or has broken strands according to the intensity of the beam signal. If so, a broken wire and broken strand signal is output.

[0048] Among them, the detection and processing unit 60 has several groups of detection units corresponding to the broken wire and broken strand sensor 10. Each detection unit receives the beam signal transmitted by the broken wire and broken strand sensor 10. This beam signal can be the beam signal obtained by each beam receiver 15 in the broken wire and broken strand sensor 10, or the total beam signal obtained by all beam receivers 15. The detection unit can respectively detect and judge whether the beam signal of each beam receiver 15 is abnormal, or directly compare whether the total beam signal obtained by the beam receivers 15 is abnormal.

[0049] Among them, the detection and processing unit 60 can compare each beam signal with a preset value, or compare the total beam signal with a preset value. When each beam signal is lower than the corresponding preset value, or the total beam signal is lower than the corresponding preset value, a broken wire and broken strand signal is generated and output to the elevator control system 200 for the elevator control system 200 to perform relevant safety actions and alarms.

[0050] Of course, based on the above embodiments or different from the above embodiments, the detection and processing unit 60 can also compare the intensity difference of all beam signals in a broken wire and broken strand sensor 10. When the difference between the maximum value and the minimum value of the beam signals exceeds the preset value, a broken wire and broken strand signal is generated and output to the elevator control system 200 for the elevator control system 200 to perform relevant safety actions and alarms. Of course, the detection and processing unit 60 can also judge whether the beam signal is abnormal according to other detection methods different from the above embodiments, not limited to the above embodiments.

[0051] Preferably, reference Figure 7, an indicator light 61 corresponding to the wire break and strand break sensor 10 is further provided on the detection and processing unit 60, and the detection and processing unit 60 also controls the action of the indicator light 61 corresponding to the wire break and strand break sensor 10 according to the wire break and strand break signal to indicate the wire break and strand break position.

[0052] Preferably, each wire break and strand break sensor 10 has a numbering information in the detection and processing unit, the wire break and strand break signal further includes the numbering information of the wire break and strand break sensor 10, and the elevator control system 200 controls an alarm mechanism (not shown in the figure) to issue an alarm according to the wire break and strand break signal, and indicates the numbering information of the corresponding wire break and strand break sensor 10 through an indicator light or a display screen (not shown in the figure), so as to facilitate maintenance personnel to find the fault point, repair the fault and repair or replace the wire break and strand break sensor 10.

[0053] Referring to FIGS. 6a and 6b, in this embodiment, the traction drive wheel includes a traction wheel 51, and there are at least two wire break and strand break sensors 10, which are respectively installed at the places where the wire ropes 20 pass on both sides of the traction wheel 51: detection points C1 and C2. The traction wheel 51 can drive the wire ropes 20 to move reciprocally to drive the car 30 to rise or fall, so as to detect the wire break and strand break conditions between the front end A of the wire rope 20 close to the car 30 and the rear end B of the wire rope 20 close to the counterweight 40.

[0054] Referring to FIGS. 6c and 6d, different from the above embodiment, in another embodiment, the traction drive wheel includes a traction wheel 51 and a car top wheel 52, and there are at least two wire break and strand break sensors 10, which are respectively installed at the places where the wire ropes 20 pass outside the traction wheel 51 and the car top wheel 52: detection points C1 and C2. The traction wheel 51 can drive the wire ropes 20 to move reciprocally to drive the car 30 to rise or fall, so as to detect the wire break and strand break conditions between the front end A of the wire rope 20 and the rear end B of the wire rope 20 close to the counterweight 40.

[0055] Referring to Figures 4a and 4b, during operation, the steel wire rope 20 passes through the center hole of the detection ring 11 and moves in the direction of arrow M. The light beam emitted by the light-emitting tube 151 is reflected by the reflective surface 113 formed by the reflective film 112 and then enters the light receiving tube 152. The light receiving tube 152 receives the light beam and converts it into an electrical signal, which is transmitted to the detection processing unit 60 via the conductive transmission element 13. Since the current light beam signal is a normal signal, the detection processing unit 60 operates normally. When a wire break N (or strand break) occurs on the wire rope 20, the broken wire will bend outward after detaching from the wire rope 20. When the broken wire position passes through the detection ring 11, the broken wire will scratch the reflective film 112, and the reflective film 113 will be damaged. At least part of the light cannot be reflected through the reflective surface 113 to the light receiving tube 152. The intensity of the light beam signal output by the light receiving tube 152 is zero or very low. The detection processing unit 60 detects an abnormality based on the intensity of the light beam signal to determine the broken wire fault, thereby generating a broken wire and broken strand signal and outputting it to the elevator control system 200, waiting for the elevator control system 200 to perform relevant safety actions and alarms. At the same time, the detection processing unit 20 also controls the indicator light 61 corresponding to the sensor 10 that outputs the fault light beam signal to operate to indicate the fault location.

[0056] This application document mainly discloses an example of using the broken wire and strand sensor 10 to detect the broken wire and strand of the elevator wire rope in an elevator. The broken wire and strand sensor 10 can also be used for detecting the broken wire and strand of the wire rope in places such as winches and hanging baskets.

[0057] The above disclosure is only the preferred embodiment of the present invention, which certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the scope of the patent application of the present invention are still within the scope covered by the present invention.

Claims

1. A wire rope broken wire and strand sensor, It is characterized in that include: A detection ring, wherein the center of the detection ring can be passed through by the steel wire rope, a detection channel surrounding the center of the detection ring is arranged inside the detection ring, the side wall of the detection channel is opaque, a reflective film is formed on the outer surface of the inner ring wall of the detection ring or the inner ring wall of the detection ring is made of a reflective film, and the reflective film forms a reflective surface on the inner surface of the inner ring wall, when a wire break or a strand break occurs on the steel wire rope, the broken wire will detach from the steel wire rope and warp outwards, and when the broken wire position passes through the detection ring, the broken wire will scratch the reflective film; There are a plurality of light beam generating receivers which are installed in the detection channel at a certain interval along the circumference of the detection ring, and each of the light beam generating receivers emits a light beam to a reflection surface located opposite to the reflection surface, and receives a light beam reflected by the reflection surface; The conductive transmission element is electrically connected to the light beam generator and receiver, supplies power to the light beam generator and receiver, and transmits the light beam signal received by the light beam generator and receiver to the outside of the detection ring.

2. The wire rope broken wire and strand sensor according to claim 1, It is characterized in that The inner annular wall is a light-transmitting wall made of light-transmitting material, and the reflective film is pasted or formed on the outer surface of the light-transmitting wall.

3. The wire rope broken wire and strand sensor according to claim 1, It is characterized in that The reflective film is tin film, aluminum foil, tin foil, silver film, aluminum film or laser film.

4. The wire rope broken wire and strand sensor according to claim 1, It is characterized in that A first light-shielding plate is arranged between two adjacent light beam generating receivers, and the first light-shielding plate isolates the light beams of the two light beam generating receivers.

5. The wire rope broken wire and strand sensor according to claim 1, It is characterized in that The light beam generating receiver comprises a light emitting tube and a light receiving tube, and a second light shielding plate is provided between the light emitting tube and the light receiving tube.

6. The wire rope broken wire and strand sensor according to claim 5, It is characterized in that The light emitting tube and the light receiving tube are arranged along the axial direction of the detection ring or along the circumferential direction of the detection ring, and the second light shielding plate is arranged perpendicular to the axial direction or parallel to the axial direction.

7. The wire rope broken wire and strand sensor according to claim 1, It is characterized in that The outer surface of the inner ring wall is in a concave arc shape, so that the reflecting surface is in a concave arc shape.

8. The wire rope broken wire and strand sensor according to claim 1, It is characterized in that The detection ring is formed by splicing at least two ring segments around the axial direction.

9. The wire rope broken wire and strand sensor according to claim 8, It is characterized in that It also includes a fixing plate. The ends of the adjacent annular segments are provided with mutually matching splicing interfaces. The fixing plate is arranged at the splicing of the adjacent annular segments and is respectively fixed to the two adjacent annular segments.

10. An elevator wire rope detection device, It is characterized in that include: A wire and strand broken sensor, wherein the wire and strand broken sensor is a wire rope broken strand broken sensor as claimed in any one of claims 1 to 9, and the wire rope of the elevator passes through the central hole of the detection ring of the wire and strand broken sensor; The detection and processing unit is electrically connected to the conductive transmission parts of each of the wire break and strand break sensors to obtain the beam signals, and determines whether the steel wire rope has wire breaks or strand breaks according to the intensity of the beam signals. If so, a wire break and strand break signal is output.

11. The elevator steel wire rope detection device according to claim 10, characterized in that: The elevator includes a car, a counterweight, a traction drive wheel, and a steel wire rope. One end of the steel wire rope is connected to the car, the other end is connected to the counterweight, and it is arranged around the traction drive wheel; There are at least two wire break and strand break sensors, which are respectively installed outside the traction drive wheel.

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