Step anomaly detection device, detection method and escalator

Abstract

This application relates to a step anomaly detection device, detection method, and escalator. The step anomaly detection device includes a groove on the side of the escalator facing the skirt panel, comprising a distance sensor, a main unit speed detector, and a main unit speed measuring device. The distance sensor is located on one side of the skirt panel. An analysis controller is communicatively connected to both the distance sensor and the main unit speed detector. The analysis controller can receive the main unit pulse waveform output by the main unit speed detector and the pulse output by the distance sensor. During main unit operation, the analysis controller compares the received first-level pulse with the main unit pulse waveform. If the first-level pulse is within its duration and the number of main unit pulses in the main unit pulse waveform exceeds a set value, an anomaly signal is output. This step anomaly detection device can promptly detect step anomalies, thus improving escalator safety.

Description

Technical Field

[0001] This application relates to the field of escalator technology, and in particular to an escalator step anomaly detection device, detection method, and escalator. Background Technology

[0002] Escalators are widely used in shopping malls, airports, and high-speed rail stations due to their convenience and usability. They are an important means of transportation for guiding crowds and facilitating pedestrian movement.

[0003] Some escalators include guide rails, steps, a main unit, and skirts. The guide rails support the steps, the main unit drives the steps, and there are two sets of skirts, positioned on opposite sides of the steps. In related technologies, step detection is necessary to ensure passenger safety. This detection typically involves a safety switch near the comb teeth that detects step buoyancy. This safety switch is connected in series with a safety circuit; when it detects step buoyancy, the safety circuit breaks, stopping the escalator. However, this technology has the following drawback: the safety switch is only triggered when a step collides with the comb teeth, failing to detect abnormalities in a timely manner, resulting in poor escalator safety. Summary of the Invention

[0004] Therefore, it is necessary to provide a step anomaly detection device, detection method, and escalator to address the above problems. This device can detect step anomalies in a timely manner, which is beneficial to improving the safety of escalators.

[0005] On one hand, a step anomaly detection device is provided for use in escalators. The escalator includes steps, a main unit, a running guide rail, and a skirt. The running guide rail extends along a predetermined direction, and the steps are movably mounted on the running guide rail. The main unit drives the steps to move relative to the running guide rail along the predetermined direction. The skirt is located on the lateral side of the steps, and the side of the steps facing the skirt has a groove. The step anomaly detection device includes:

[0006] Distance sensor,

[0007] The ranging sensor is disposed on one side of the skirt panel, with its detection surface facing the step. The ranging sensor outputs a pulse signal. When the step's upward movement exceeds a set height H1, the ranging sensor detects the step's location outside the groove and outputs a first-level pulse. When the step swings laterally a set distance L1 towards the skirt panel, the ranging sensor detects the bottom of the groove and the step's location outside the groove, and outputs the first-level pulse. When there is a foreign object between the step and the skirt panel, and the foreign object passes through the ranging sensor's detection area, the ranging sensor detects the foreign object and outputs the first-level pulse.

[0008] A host speed detector, wherein the host speed detector is used to detect the output speed of the host and is capable of outputting a periodic host pulse waveform according to the output speed; and

[0009] An analysis controller is communicatively connected to both the ranging sensor and the host speedometer. The analysis controller is capable of receiving the host pulse waveform output by the host speedometer and the pulse signal output by the ranging sensor.

[0010] During the operation of the host, the analysis controller compares the received first level pulse with the host pulse waveform. If the first level pulse is within the continuous range and the number of host pulses in the host pulse waveform exceeds a set value, an abnormal signal is output.

[0011] In one embodiment, the ranging sensor is a laser sensor, the diameter of the laser spot is d, the groove opening is rectangular, and the groove opening width is W. The diameter d of the laser spot and the groove opening width W satisfy the following relationship: W > d.

[0012] In one embodiment, the diameter d of the light spot, the groove width W, and the set height H1 satisfy the following relationship: H1 > (d / 2 + W / 2).

[0013] In one embodiment, the groove depth is H2, wherein the groove depth H2 and the set distance L1 satisfy the following relationship: H2≥L1.

[0014] In one embodiment, the maximum detection distance of the laser sensor is L2, wherein the maximum detection distance L2 and the set distance L1 satisfy the following relationship: L2>L1.

[0015] In one embodiment, there are two skirt panels, which are spaced apart, and the step is located between the two skirt panels. The distance measuring sensor is provided on both skirt panels, and the groove is provided on both sides of the step facing the two skirt panels.

[0016] In one embodiment, the skirt panel is provided with a mounting groove, the opening of the mounting groove facing the step, and the ranging sensor is installed in the mounting groove.

[0017] In one embodiment, a cleaning component is also included for cleaning the side of the steps facing the skirt panel.

[0018] On the other hand, an escalator is also provided, including steps, a main unit, a running guide rail, a skirt panel, and the aforementioned step abnormality detection device. The running guide rail extends along a set direction, the steps are movably disposed on the running guide rail, the main unit is used to drive the steps to move relative to the running guide rail along the set direction, the skirt panel is located on the lateral side of the steps, and the side of the steps facing the skirt panel is provided with several grooves.

[0019] Furthermore, a method for detecting step anomalies is also provided, comprising a distance sensor, a host speed detector, and an analysis controller communicatively connected to the distance sensor and the host speed detector, wherein the host speed detector is used to detect the output speed of the host and can output a periodic host pulse waveform according to the output speed, and the side of the step facing the skirt of the escalator is provided with a groove, and the method for detecting step anomalies includes the following steps:

[0020] When the ranging sensor detects that the step is located outside the groove, or detects that the bottom of the groove and the step are located outside the groove, or detects a foreign object between the step and the skirt, it outputs a first level pulse and transmits it to the analysis controller. During the operation of the host, the analysis controller compares the received first level pulse with the host pulse waveform. If the first level pulse is within the continuous range and the number of host pulses in the host pulse waveform exceeds a set value, an abnormal signal is output.

[0021] The aforementioned step anomaly detection device, through the cooperation of a distance sensor, a main unit speed detector, an analysis controller, and the steps, can promptly detect situations such as step floating, lateral swaying, and foreign objects between the steps and the skirt board. The analysis controller then outputs an abnormal signal in a timely manner, allowing staff to promptly inspect and maintain the escalator, effectively improving escalator safety and reducing component damage and personal injury accidents. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the ranging sensor, ladder, and skirt in some embodiments of this application.

[0023] Figure 2 This is a schematic diagram showing the distribution of the ladder and ranging sensors in some embodiments of this application.

[0024] Figure 3 This is a side view of a ladder in some embodiments of this application.

[0025] Figure 4 This is a schematic diagram of the structure of the ladder, bracket, casters and cleaning components in some embodiments of this application.

[0026] Figure 5 The main pulse waveform and the pulse signal output by the ranging sensor are shown in some embodiments of this application.

[0027] In the diagram: 1. Step; 101. Groove; 2. Skirt; 201. Mounting slot; 3. Distance sensor; 4. Bracket; 5. Moving wheel set; 501. First wheel; 502. Second wheel; 6. Cleaning component. Detailed Implementation

[0028] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0029] In the description of this application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0030] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, if the term "plurality" appears, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0031] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0032] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0033] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0034] See Figure 1 , Figure 2 and Figure 3 , Figure 1 The following are schematic diagrams illustrating the structure of the ranging sensor, ladder, and skirt in some embodiments of this application; Figure 2 A schematic diagram showing the distribution of the ladder and ranging sensors in some embodiments of this application is illustrated; Figure 3A side view of a step in some embodiments of this application is shown. One embodiment of this application provides an escalator including a step 1, a main unit (not shown), a running guide rail (not shown), a skirt panel 2, and a step anomaly detection device. The running guide rail extends along a set direction, the step 1 is movably mounted on the running guide rail, the main unit drives the step 1 to move relative to the running guide rail along the set direction, and the skirt panel 2 is located on the transverse side of the step 1. Several grooves 101 are provided on the side of the step 1 facing the skirt panel 2. The step anomaly detection device includes a distance sensor 3, a main unit speed sensor (not shown), and an analysis controller (not shown). The distance sensor 3 is located on one side of the skirt panel 2, with its detection surface facing the step 1. The distance sensor 3 can output pulse signals. The pulse signals output by the distance sensor include a first-level pulse and a second-level pulse. In this embodiment, the first-level pulse is a high-level pulse, and the second-level pulse is a low-level pulse. When the rising height of step 1 exceeds the set height H1, the distance sensor 3 can detect the part of step 1 located outside the groove 101 and output a high-level pulse; when step 1 swings a set distance L1 laterally towards the skirt plate 2, the distance sensor 3 can detect the bottom of the groove 101 and the part of step 1 located outside the groove 101; when there is a foreign object between step 1 and skirt plate 2 and the foreign object enters the detection area of ​​the distance sensor 3, the distance sensor 3 can detect the foreign object and output a high-level pulse. The host speed sensor is used to detect the output speed of the host and can output a periodic host pulse waveform according to the output speed. The analysis controller is communicatively connected to the distance sensor 3 and the host speed sensor respectively. In actual implementation, the analysis controller is connected to the distance sensor 3 and the host speed sensor respectively through transmission lines, so that the analysis controller can communicate with the distance sensor 3 and the host speed sensor respectively. The analysis controller can receive the host pulse waveform output by the host speed sensor and can receive the pulse output by the distance sensor 3. During the operation of the host, the analysis controller compares the high-level pulses received from the ranging sensor with the host pulse waveform. If the high-level pulses output by the ranging sensor are within the continuous range, and the number of host pulses in the host pulse waveform exceeds the set value, an abnormal signal is output.

[0035] Since the ranging sensor 3 is mounted on the skirt plate 2, its position is fixed. The detection area of ​​the ranging sensor 3 is located on the side of the skirt plate 2 facing the step 1. When the step 1 moves relative to the running guide rail along the set direction, it will pass through the detection area. Under normal conditions, all parts of the step 1 facing the skirt plate 2, except for the groove 101, can be detected by the ranging sensor 3 when they pass through the detection area. When the ranging sensor 3 senses a physical object (i.e., senses the step 1), it outputs a high-level pulse and transmits it to the analysis controller. Since the detection distance of the ranging sensor 3 is limited, when the groove 101 (the groove 101 is a virtual object) passes through the detection area, the ranging sensor 3 cannot detect the bottom of the groove 101. At this time, the ranging sensor 3 outputs a low-level pulse and transmits it to the analysis controller. When the escalator rises above the set height H1, it causes the position of the groove 101 to shift upwards. When the step 1 is running, the part of the step 1 below the groove 101 will pass through the detection area of ​​the distance sensor 3 (i.e., the groove 101 passes over the detection area). At this time, the distance sensor 3 can detect the part of the step 1 outside the groove 101. Therefore, during the process of the step 1 passing through the detection area, the distance sensor 3 does not output a low-level pulse, which makes the stroke of the output high-level pulse longer. When the step 1 swings a set distance L1 laterally towards the skirt 2, it will cause the groove 101 to move laterally towards the distance sensor 3, shortening the distance between the bottom of the groove 101 and the distance sensor 3. The distance between the groove 101 and the skirt 2 is such that when the groove 101 passes through the detection area of ​​the sensor, the ranging sensor 3 can detect the bottom of the groove 101. Therefore, during the process of the entire step 1 passing through the detection area, the ranging sensor 3 can not only detect the part of the step 1 outside the groove 101, but also detect the bottom of the groove 101. During the whole process, the ranging sensor 3 has no low-level pulse output, which makes the stroke of the output high-level pulse longer. When there is a foreign object between the step 1 and the skirt 2 and the foreign object passes through the detection area of ​​the ranging sensor 3, the foreign object will block the groove 101 of the step 1. Therefore, during the process of the entire step 1 passing through the detection area, the ranging sensor 3 has no low-level pulse output, which makes the stroke of the output high-level pulse longer.

[0036] It is understandable that the main unit is connected to step 1 via a drive mechanism, and the operation of the main unit drives step 1 to move relative to the running guide rail along a set direction. The horizontal axis of the main unit's pulse waveform represents the stroke of the main unit, and the horizontal axis represents the pulse voltage value of the main unit. Under normal operating conditions of step 1, the high-level pulses in the main unit's pulse waveform and the high-level pulses output by the ranging sensor 3 form a certain relationship. Within the duration of the high-level pulses output by the ranging sensor, the number of high-level pulses in the main unit's pulse waveform is constant. When step 1 malfunctions, the stroke of the high-level pulses output by the ranging sensor 3 will become longer, and within the duration of the high-level pulses output by the ranging sensor, the number of high-level pulses in the main unit's pulse waveform will increase. When the number of main unit pulses in the main unit's pulse waveform exceeds the set value within the duration of the high-level pulses output by the ranging sensor 3, it indicates that there is an abnormality in the step.

[0037] For ease of understanding, please refer to Figure 5 When step 1 is normal, the high-level pulse output by the ranging sensor 3 has a continuous range, and the number of high-level pulses in the host pulse waveform is 1 (taking the set value as an example). When step 1 is abnormal (in the two dashed line intervals), the stroke of the high-level pulse output by the ranging sensor 3 becomes longer. Therefore, when the high-level pulse output by the ranging sensor 3 has a continuous range, the number of high-level pulses in the host pulse waveform is 3 (exceeding the set value).

[0038] This type of step anomaly detection device, through the cooperation of the distance sensor 3, the main speed detector, the analysis controller and the step 1, can promptly detect when the step 1 floats, swings laterally, or when there are foreign objects between the step 1 and the skirt 2. The analysis controller will output an abnormal signal in a timely manner, so that the staff can carry out maintenance on the escalator in a timely manner, which effectively improves the safety of the escalator and reduces component damage and personal injury accidents.

[0039] It should be noted that "horizontal" in this description refers to the horizontal direction perpendicular to the direction of escalator operation.

[0040] In some embodiments, the ranging sensor 3 is a laser sensor with a laser spot diameter of d, a rectangular groove 101 with a groove width of W, and the laser spot diameter d and the groove width W satisfy the following relationship: W > d. When the step 1 is in normal condition, when the groove 101 passes through the detection area, the laser spot of the laser sensor can fall entirely into the interior of the groove 101.

[0041] The diameter d of the light spot, the width W of the groove 101, and the set height H1 satisfy the following relationship: H1>(d / 2+W / 2). When the floating height of the step 1 exceeds the set height H1, it can be ensured that the light spot will not partially fall into the interior of the groove 101 during the process of the step 1 passing through the detection area.

[0042] The groove 101 has a groove depth of H2, and the groove depth H2 and the set distance L1 satisfy the following relationship: H2 ≥ L1. It should be noted that the bottom of the groove 101 refers to the side of the groove 101 directly opposite the groove opening; the groove depth of the groove 101 refers to the distance between the bottom of the groove 101 and the groove opening. Setting H2 ≥ L1 avoids excessive lateral swing of the ladder 1, which could prevent the laser sensor from detecting it, thus improving the reliability of the ladder anomaly detection device.

[0043] In actual implementation, along the running direction of the escalator, the length of the part of step 1 that floats up above the set height H1 is L3, and the groove length of groove 101 is L4, where L3 > L4.

[0044] Furthermore, the maximum detection distance of the laser sensor is L2, where the maximum detection distance L2 and the set distance L1 satisfy the following relationship: L2 > L1. In actual implementation, under normal conditions, the distance between the bottom of the groove 101 and the ranging sensor 3 is L0, where L0 > L1. The distance between the step 1 and the skirt 2 is less than or equal to the maximum detection distance of the laser sensor, L2. This ensures that under normal conditions, the laser sensor can detect the portion of the step 1 located outside the groove 101 but cannot detect the bottom of the groove 101. Setting L0 > L1 ensures that the laser detector can detect the bottom of the groove 101 even when the step 1 swings laterally.

[0045] Understandably, referring to Figure 4 The step 1 is mounted on the running guide rail by a support assembly, which includes a bracket 4 and a set of moving wheels 5. The step is mounted on top of the support assembly, and the set of moving wheels 5 is mounted on the bottom of the bracket 4. The set of moving wheels 5 has two sets, each set of moving wheels 5 including a first wheel 501 and a second wheel 502 distributed at intervals along the running direction of the escalator. Along the running direction of the escalator, the first wheel 501 is located in front of the second wheel 502. The first wheel 501 and the second wheel 502 are both mounted on the bracket 4. The step 1 may float upwards due to a malfunction, using either the first wheel 501 or the second wheel 502 of the two sets of moving wheels 5 as a fulcrum.

[0046] In some embodiments, there are two skirt panels 2, which are distributed laterally at a distance. The step 1 is located between the two skirt panels 2. Each skirt panel 2 is provided with a distance measuring sensor 3. The step 1 has grooves 101 on both sides facing the two skirt panels 2. The distance measuring sensors 3 on the two skirt panels 2 can detect the two laterally opposite sides of the step 1. In this way, the swing of the step 1 towards either skirt panel 2 can be detected by the distance measuring sensor 3 on the corresponding skirt panel 2, preventing the risk of missed detection. The distance measuring sensors 3 on the two skirt panels 2 can be symmetrically arranged or asymmetrically arranged.

[0047] In actual implementation, in order to improve the step abnormality detection device, multiple grooves 101 are provided on the side of the step 1 facing the skirt plate 2, and the grooves 101 on the same side are distributed at intervals.

[0048] In some embodiments, the skirt plate 2 is recessed and provided with a mounting groove 201. The opening of the mounting groove 201 faces the step 1. The distance sensor 3 is installed in the mounting groove 201. The mounting groove 201 provides space for the distance sensor 3 to be accommodated, so that the distance sensor 3 does not protrude from the side of the skirt plate 2 facing the step 1, and prevents the step 1 from colliding with the distance sensor 3 due to the step 1 swinging laterally.

[0049] Understandably, after prolonged use, dust and other debris accumulate on the side of the escalator steps 1 facing the skirt panel 2, thus affecting the detection of the distance measuring sensor. To address this issue, the step anomaly detection device also includes a cleaning component 6. The cleaning component 6 is used to clean the side of the escalator steps 1 facing the skirt panel 2. By cleaning the side of the steps 1 that is contaminated with debris from the skirt panel 2 using the cleaning component 6, the detection of the distance measuring sensor 3 can be prevented. In actual implementation, the cleaning component 6 is installed on the lateral side of the steps 1 using a mounting bracket, avoiding the position of the distance measuring sensor 3 to prevent the cleaning component 6 from interfering with the detection of the distance measuring sensor 3.

[0050] Reference Figure 1 , Figure 2 and Figure 3In some embodiments, a step anomaly detection method is also provided, applied to any of the step anomaly detection devices described above. This step anomaly detection method provides a distance sensor 3, a main unit speed sensor, and an analysis controller communicatively connected to the distance sensor 3 and the main unit speed sensor respectively. The main unit speed sensor detects the output speed of the main unit and can output a periodic main unit pulse waveform. A groove 101 is provided on the side of the step 1 facing the skirt 2 of the escalator. The step anomaly detection method includes the following steps: when the distance sensor 3 detects that the step 1 is located outside the groove 101, or detects the bottom of the groove 101 and the part of the step 1 located outside the groove 101, or detects a foreign object between the step 1 and the skirt 2, it outputs a high-level pulse and transmits it to the analysis controller. The analysis controller compares the received high-level pulse with the main unit pulse waveform. If the high-level pulse output by the distance sensor 3 received by the analysis controller is within a continuous range, and the number of main unit pulses in the main unit pulse waveform exceeds a set value, an anomaly signal is output. Under normal conditions, all parts of step 1 facing the skirt plate 2, except for the groove 101, can be detected by the ranging sensor 3 when they pass through the detection area. When the ranging sensor 3 senses the object (i.e., senses step 1), it outputs a high-level pulse and transmits it to the analysis controller. Since the detection distance of the ranging sensor 3 is limited, the ranging sensor 3 cannot detect the bottom of the groove 101 (the groove 101 is a virtual body) when it passes through the detection area. At this time, the ranging sensor 3 outputs a low-level pulse and transmits it to the analysis controller. Therefore, when step 1 is running normally, it will output a continuous periodic pulse signal. When step 1 floats upward, it causes the groove 101 on step 1 to shift upward as a whole. When step 1 moves along the set direction relative to the running guide rail, the groove 101 on step 1 will not fall into the detection area of ​​the ranging sensor 3. Therefore, during the process of step 1 passing through the detection area, the ranging sensor 3 does not output a low-level pulse, which makes the stroke of the high-level pulse output by the ranging sensor 3 longer. When step 1 swings laterally, the distance between the bottom of the groove 101 and the ranging sensor 3 decreases, and the distance sensor 3 shifts during the process of step 1 passing through the detection area. The distance sensor 3 can detect not only the part of the step 1 outside the groove 101, but also the bottom of the groove 101. During the whole process, the distance sensor 3 has no low-level pulse output, which makes the stroke of the output high-level pulse longer. When there is a foreign object between the step 1 and the skirt 2, and the foreign object passes through the detection area of ​​the distance sensor 3, the foreign object will block the groove 101 of the step 1. During the process of the step 1 passing through the detection area, the distance sensor 3 has no low-level pulse output, which makes the stroke of the output high-level pulse of the distance sensor 3 longer.Under normal operating conditions of step 1, the high-level pulses in the main unit's pulse waveform and the high-level pulses output by the distance sensor 3 form a certain relationship. Within the duration of the high-level pulse output by the distance sensor 3, the number of high-level pulses in the main unit's pulse waveform remains constant. When a step malfunctions, the stroke of the high-level pulse output by the distance sensor 3 becomes longer, and within the duration of the high-level pulse output by the distance sensor 3, the number of high-level pulses in the main unit's pulse waveform increases. When the number of main unit pulses in the main unit's pulse waveform exceeds a set value within the duration of the high-level pulse output by the distance sensor 3, it indicates a step malfunction. This step malfunction detection method can not only detect the upward floating and lateral swaying of step 1, but also detect foreign objects between step 1 and skirt 2, which helps improve escalator safety. Furthermore, it allows for timely detection of step 1 malfunctions, enabling timely maintenance by staff and reducing the probability of component damage and personal injury accidents.

[0051] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0052] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A step anomaly detection device, applied to an escalator, the escalator including steps, a main unit, a running guide rail, and a skirt, the running guide rail extending along a predetermined direction, the steps movably disposed on the running guide rail, the main unit driving the steps to move relative to the running guide rail along the predetermined direction, the skirt located on the lateral side of the steps, characterized in that, The step has a groove on the side facing the skirt panel, and the step anomaly detection device includes: A distance measuring sensor is disposed on one side of the skirt panel, with its detection surface facing the step. The distance measuring sensor can output pulse signals. When the upward height of the step exceeds a set height H1, the distance measuring sensor can detect that the step is located outside the groove and output a first level pulse. When the step swings laterally a set distance L1 towards the skirt panel, the distance measuring sensor can detect the bottom of the groove and the part of the step located outside the groove and output the first level pulse. When there is a foreign object between the step and the skirt panel, and the foreign object passes through the detection area of ​​the distance measuring sensor, the distance measuring sensor can detect the foreign object and output the first level pulse. A host speed detector, wherein the host speed detector is used to detect the output speed of the host and is capable of outputting a periodic host pulse waveform according to the output speed; and An analysis controller is communicatively connected to both the ranging sensor and the host speedometer. The analysis controller is capable of receiving the host pulse waveform output by the host speedometer and the pulse signal output by the ranging sensor. During the operation of the host, the analysis controller compares the received first level pulse with the host pulse waveform. If the first level pulse is within the continuous range and the number of host pulses in the host pulse waveform exceeds a set value, an abnormal signal is output.

2. The step-by-step anomaly detection device according to claim 1, characterized in that, The ranging sensor is a laser sensor with a laser spot diameter of d. The groove opening is rectangular with a groove width of W. The laser spot diameter d and the groove opening width W satisfy the following relationship: W > d.

3. The step-by-step anomaly detection device according to claim 2, characterized in that, The diameter d of the light spot, the groove width W, and the set height H1 satisfy the following relationship: H1>(d / 2+W / 2).

4. The step-by-step anomaly detection device according to claim 2, characterized in that, The groove depth is H2, wherein the groove depth H2 and the set distance L1 satisfy the following relationship: H2≥L1.

5. The step-by-step anomaly detection device according to claim 2, characterized in that, The maximum detection distance of the laser sensor is L2, wherein the maximum detection distance L2 and the set distance L1 satisfy the following relationship: L2>L1.

6. The step-by-step anomaly detection device according to any one of claims 1 to 5, characterized in that, The skirt has two panels, which are spaced apart. The step is located between the two skirt panels. The distance measuring sensor is provided on both skirt panels. The step has grooves on both sides facing the two skirt panels.

7. The step-by-step anomaly detection device according to any one of claims 1 to 5, characterized in that, The skirt panel is provided with a mounting groove, the opening of which faces the step, and the ranging sensor is installed in the mounting groove.

8. The step-by-step anomaly detection device according to any one of claims 1 to 5, characterized in that, It also includes a cleaning component for cleaning the side of the steps facing the skirt panel.

9. An escalator, characterized in that, The device includes a ladder, a main unit, a running guide rail, a skirt plate, and a ladder abnormality detection device as described in any one of claims 1 to 8. The running guide rail extends along a set direction, the ladder is movably disposed on the running guide rail, the main unit is used to drive the ladder to move relative to the running guide rail along the set direction, the skirt plate is located on the lateral side of the ladder, and the side of the ladder facing the skirt plate is provided with a plurality of grooves.

10. A method for detecting step anomalies in the step anomaly detection device according to any one of claims 1 to 8, characterized in that: The system provides a distance sensor, a main unit speed detector, and an analysis controller that is communicatively connected to both the distance sensor and the main unit speed detector. The main unit speed detector is used to detect the output speed of the main unit and can output a periodic main unit pulse waveform based on the output speed. A groove is provided on the side of the escalator skirt facing the step. The step anomaly detection method includes the following steps: When the ranging sensor detects that the step is located outside the groove, or detects that the bottom of the groove and the step are located outside the groove, or detects a foreign object between the step and the skirt, it outputs a first level pulse and transmits it to the analysis controller. During the operation of the host, the analysis controller compares the received first level pulse with the host pulse waveform. If the first level pulse is within the continuous range and the number of host pulses in the host pulse waveform exceeds a set value, an abnormal signal is output.

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