Elevator traveling cable attitude detection system

Abstract

The invention discloses an elevator traveling cable posture detection system which comprises a transverse detection device, a longitudinal detection device and an early warning judgment device. The transverse detection device comprises a transverse infrared transmitter and a transverse infrared receiver; the longitudinal detection device comprises a longitudinal infrared transmitter and a longitudinal infrared receiver; the infrared light emitting directions of the transverse infrared emitter and the longitudinal infrared emitter are perpendicular to each other; the transverse detection device and the longitudinal detection device are installed at the same horizontal height of an elevator shaft to form a horizontal detection range, and a traveling cable is located in the detection range. A preset first safety area and a preset second safety area are arranged in the detection range, and when at least part of the traveling cable leaves the first safety area or the second safety area, the early warning judgment device sends alarm information to the elevator system. According to the invention, postures of swinging, twisting and the like of the traveling cable in all directions can be detected.

Description

Technical Field

[0001] The present invention relates to the technical field of elevators, and in particular to a posture detection system for an elevator traveling cable. Background Art

[0002] During elevator operation, the elevator car needs to be supplied with power and control signals. The elevator's traveling cable, a crucial component for providing these power and control signals, connects one end to the junction box at the bottom of the car and the other to the elevator's control cabinet. However, the elevator's traveling cable can swing due to high-speed operation, the elevator shaft environment, or building vibrations. Excessive swing or twisting of the traveling cable can cause it to strike or snag on components in the shaft, potentially rupturing or even breaking the cable, disrupting normal elevator operation and endangering passenger and building safety.

[0003] Chinese patent document CN202110321687.9 discloses a method for detecting the swing amplitude of a traveling cable using an infrared device. However, this technical solution only installs the detection device in one direction, effectively detecting the swing of the traveling cable only in the direction parallel to the detection device, but not in the direction perpendicular to the detection device or in detecting torsional motion.

[0004] Furthermore, in the aforementioned technical solution, the detection device's transmitter and receiver are located on the same side of the shaft, and the swing amplitude is determined by infrared light reflected by reflective stickers wrapped around the accompanying cable. This can cause the reflective stickers to break or fall off due to the swinging of the accompanying cable, thus affecting detection effectiveness. Furthermore, the reflective stickers are difficult to replace once damaged or fallen, making them unsuitable for long-term use. Summary of the Invention

[0005] The technical problem to be solved by the present invention is how to reliably detect the multi-directional swing and torsion of the traveling cable.

[0006] To solve the above technical problems, the present invention provides an elevator traveling cable posture detection system, comprising a transverse detection device, a longitudinal detection device, and an early warning judgment device; the transverse detection device and the longitudinal detection device are electrically connected, the transverse detection device and the early warning judgment device are communicatively connected, and the longitudinal detection device and the early warning judgment device are communicatively connected;

[0007] The horizontal detection device includes a horizontal infrared transmitter and a horizontal infrared receiver; the vertical detection device includes a vertical infrared transmitter and a vertical infrared receiver; the infrared light emission directions of the horizontal infrared transmitter and the vertical infrared transmitter are perpendicular to each other;

[0008] The transverse detection device and the longitudinal detection device are installed at the same level in the elevator shaft to form a horizontal detection range, and the accompanying cable is located within the detection range;

[0009] The detection range has a preset first safety zone and a second safety zone. When the accompanying cable at least partially leaves the first safety zone or the second safety zone, the early warning judgment device sends an alarm message to the elevator system.

[0010] Preferably, the horizontal infrared transmitter and the horizontal infrared receiver are respectively installed on the shaft walls on the left and right sides of the elevator shaft; the vertical infrared transmitter and the vertical infrared receiver are respectively installed on the shaft walls on the front and rear sides of the elevator shaft.

[0011] Preferably, the longitudinal detection device is also used to determine the torsion angle θ of the accompanying cable. When the torsion angle θ is greater than a preset torsion angle threshold, the early warning judgment device sends an alarm message to the elevator system.

[0012] Preferably, the longitudinal detection device determines the torsion angle θ of the accompanying cable by identifying the longitudinal projection width of the accompanying cable within the detection range, and then calculating the torsion angle θ according to the width and thickness of the accompanying cable.

[0013] Preferably, when the elevator is running, the early warning judgment device obtains the real-time position of the elevator car, and when the elevator car is within the detection range, the early warning judgment device will not send an alarm message to the elevator system.

[0014] Preferably, when the elevator is running, the early warning judgment device obtains the real-time position of the elevator car. When the early warning judgment device judges the current position of the elevator car before issuing an alarm message, and the elevator car is within the detection range, the early warning judgment device will not issue an alarm message to the elevator system.

[0015] Compared with the prior art, the present invention can detect the swing, twisting and other postures of the accompanying cable in all directions; in addition, since no reflective stickers are used, there is no problem of reflective stickers being damaged or falling off, thereby affecting the detection effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0017] Figure 1 This is a structural diagram of an elevator traveling cable posture detection system according to Example 1;

[0018] Figure 2 This is a working diagram of the elevator traveling cable posture detection system of Example 1;

[0019] Figure 3 This is a schematic diagram of the detection range of the elevator traveling cable posture detection system of Example 1;

[0020] Figure 4Schematic diagram of the elevator traveling cable posture detection system detecting the torsion of the traveling cable according to Example 2;

[0021] Figure 5 This is a schematic diagram of the elevator traveling cable posture detection system of Example 3 when the car is within the detection range. DETAILED DESCRIPTION

[0022] The following describes the implementation manner of the present invention through specific specific embodiments. Those skilled in the art can fully understand other advantages and technical effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through different specific implementation manners, and the various details in this specification can also be applied based on different viewpoints, and various modifications or changes can be made without deviating from the overall design concept of the invention. It should be noted that, in the absence of conflict, the following embodiments and the features in the embodiments can be combined with each other. The following exemplary embodiments of the present invention can be implemented in a variety of different forms and should not be interpreted as being limited to the specific embodiments described herein. It should be understood that these embodiments are provided to make the disclosure of the present invention thorough and complete, and to fully convey the technical solutions of these exemplary embodiments to those skilled in the art.

[0023] Example 1

[0024] like Figures 1 to 3 As shown, this embodiment provides an elevator traveling cable posture detection system, including: a horizontal detection device, a longitudinal detection device and an early warning judgment device 3.

[0025] The lateral detection device includes a lateral infrared transmitter 11 and a lateral infrared receiver 12. The lateral infrared transmitter 11 includes a plurality of lateral infrared transmitting tubes 111, and the lateral infrared receiver 12 includes a plurality of lateral infrared receiving tubes 121.

[0026] The longitudinal detection device includes a longitudinal infrared transmitter 21 and a longitudinal infrared receiver 22. The longitudinal infrared transmitter 21 includes a plurality of longitudinal infrared transmitting tubes 211, and the longitudinal infrared receiver 22 includes a plurality of longitudinal infrared receiving tubes 221.

[0027] The horizontal infrared transmitter 11 and the horizontal infrared receiver 12 of the horizontal detection device are respectively installed on the shaft walls on the left and right sides of the elevator shaft. The vertical infrared transmitter 21 and the vertical infrared receiver 22 of the vertical detection device are respectively installed on the shaft walls on the front and rear sides of the elevator shaft. The two sets of detection devices are installed at the same level of the elevator shaft, surrounding the accompanying cable 4 in the middle.

[0028] The early warning judgment device 3 can receive signals from the lateral detection device and the longitudinal detection device and issue an alarm to the elevator control system; the lateral detection device and the longitudinal detection device are connected by wire; the early warning judgment device 3 communicates with the lateral detection device or with the longitudinal detection device 2 by wire or wireless.

[0029] The horizontal infrared emitting tube 111 and the vertical infrared emitting tube 211 continuously emit infrared rays, and the corresponding horizontal infrared receiving tube 121 and the vertical infrared receiving tube 221 receive the infrared rays, forming an infrared plane matrix, that is, forming a horizontal detection range, and making the accompanying cable within the detection range. When there is an accompanying cable 4 in the plane (such as Figure 2 As shown in FIG5 ), the accompanying cable 41 near the hoistway side and the accompanying cable 42 near the car side will block the infrared rays emitted by the horizontal infrared emitting tube 111 and the vertical infrared emitting tube 211, and the corresponding horizontal infrared receiving tube 121 and the vertical infrared receiving tube 221 will not be able to receive the infrared rays and send the results to the early warning judgment device 3. The detection range has a preset first safety zone ( Figure 3 Security Zone 1) and the second security zone ( Figure 3 Safety zone 2), when the accompanying cable at least partially leaves the first safety zone or the second safety zone, that is, part of the accompanying cable enters the alarm zone, the infrared receiving tubes 121 and 221 in the alarm zone cannot receive infrared rays, and the early warning judgment device sends an alarm message to the elevator system.

[0030] Example 2

[0031] like Figure 4 As shown, the elevator traveling cable posture detection system of this embodiment is also used to determine the torsion angle θ of the traveling cable.

[0032] When the traveling cable 4 is twisted, the number of longitudinal infrared receiving tubes 221 that fail to receive infrared light increases. Based on the number of longitudinal infrared receiving tubes 221 failing to receive infrared light, the longitudinal projection width X of the traveling cable 4 within the detection range can be determined. The early warning judgment device 3 calculates the current twist angle θ of the traveling cable 4 based on the projection width X, the thickness A of the traveling cable 4, and the width B of the traveling cable 4. This calculation uses the following formula: θ = arcsin((XA) / (BA)).

[0033] If the current torsion angle θ of the traveling cable 4 exceeds a preset torsion angle threshold, the early warning judgment device 3 will send an alarm message to the elevator control system.

[0034] Example 3

[0035] like Figure 5As shown, when the elevator car 5 passes through the infrared matrix area, that is, when the elevator car is within the detection range, the car 5 will block the infrared rays in the alarm zone, triggering an alarm. To avoid this situation, in the elevator traveling cable posture detection system of this embodiment, the early warning judgment device obtains the real-time position of the elevator car. When the elevator car is within the detection range, the early warning judgment device does not issue an alarm to the elevator system. Alternatively, the early warning judgment device 3 obtains the current position of the elevator car 5 before issuing an alarm. When the elevator car is within the detection range, the early warning judgment device does not issue an alarm to the elevator system.

[0036] The present invention has been described in detail above by way of specific embodiments and examples, but these do not constitute limitations of the present invention. Without departing from the principles of the present invention, those skilled in the art may make many variations and improvements, which should also be considered within the scope of protection of the present invention.

Claims

1. An elevator traveling cable posture detection system, characterized in that: It includes a transverse detection device, a longitudinal detection device and an early warning judgment device; the transverse detection device and the longitudinal detection device are electrically connected, the transverse detection device and the early warning judgment device are communicatively connected, and the longitudinal detection device and the early warning judgment device are communicatively connected; The horizontal detection device includes a horizontal infrared transmitter and a horizontal infrared receiver; the vertical detection device includes a vertical infrared transmitter and a vertical infrared receiver; the infrared light emission directions of the horizontal infrared transmitter and the vertical infrared transmitter are perpendicular to each other; The transverse detection device and the longitudinal detection device are installed at the same level in the elevator shaft to form a horizontal detection range, and the accompanying cable is located within the detection range; The detection range has a preset first safety zone and a second safety zone. When the accompanying cable at least partially leaves the first safety zone or the second safety zone, the early warning judgment device sends an alarm message to the elevator system.

2. The elevator traveling cable posture detection system according to claim 1, characterized in that: The horizontal infrared transmitter and the horizontal infrared receiver are respectively installed on the shaft walls on the left and right sides of the elevator shaft; the vertical infrared transmitter and the vertical infrared receiver are respectively installed on the shaft walls on the front and rear sides of the elevator shaft.

3. The elevator traveling cable posture detection system according to claim 1, characterized in that: The longitudinal detection device is also used to determine the torsion angle θ of the accompanying cable. When the torsion angle θ is greater than a preset torsion angle threshold, the early warning judgment device sends an alarm message to the elevator system.

4. The elevator traveling cable posture detection system according to claim 1, characterized in that: The method for the longitudinal detection device to determine the torsion angle θ of the accompanying cable is: identifying the longitudinal projection width of the accompanying cable within the detection range, and then calculating the torsion angle θ based on the width and thickness of the accompanying cable.

5. The elevator traveling cable posture detection system according to claim 1, characterized in that: When the elevator is running, the early warning judgment device obtains the real-time position of the elevator car. When the elevator car is within the detection range, the early warning judgment device will not send an alarm message to the elevator system.

6. The elevator traveling cable posture detection system according to claim 1, characterized in that: When the elevator is running, the early warning judgment device obtains the real-time position of the elevator car. When the early warning judgment device judges the current position of the elevator car before issuing an alarm message, and the elevator car is within the detection range, the early warning judgment device will not issue an alarm message to the elevator system.

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