Stair anomaly detection device and method and escalator

Abstract

The invention relates to a stair anomaly detection device and method and an escalator. A step anomaly detection device is characterized in that a groove is formed in one side, facing an apron board, of a step of an escalator, and the step anomaly detection device comprises a distance measuring sensor, a host velometer and a host velometer. The distance measuring sensor is arranged on one side of the apron board, the analysis controller is in communication connection with the distance measuring sensor and the host velometer, and the analysis controller can receive host pulse waveforms output by the host velometer and can receive pulses output by the distance measuring sensor; and during the operation period of the host, the analysis controller compares the received first level pulse with the host pulse waveform, and if the first level pulse is in a continuous interval and the number of host pulses in the host pulse waveform exceeds a set value, an abnormal signal is output. The stair abnormity detection device can find the abnormity of the stairs in time, and is beneficial to improving the safety of the escalator.

Description

Technical Field

[0001] The present application relates to the technical field of escalators, and in particular to a step abnormality detection device, a detection method and an escalator. Background Art

[0002] Escalators are convenient and easy to use and are widely used in places such as shopping malls, airports and high-speed rail stations. They are an important means of transportation to guide crowds and facilitate people's walking.

[0003] Some escalators include guide rails, steps, main units and skirts. The guide rails are used to support the steps, the main unit is used to drive the steps to run, and there are two sets of skirts, which are respectively arranged on opposite sides of the steps. In the related art, in order to ensure the safety of passengers, the steps need to be detected. The detection method is usually to detect the floating of the steps by a safety switch near the comb teeth. The safety switch is connected in series to the safety circuit. When the safety switch detects that the steps are floating, the safety circuit is disconnected to stop the escalator. However, the related art has the following shortcomings: the safety switch will only be triggered when the steps collide with the comb teeth, and the abnormal situation of the steps cannot be detected in time, resulting in poor safety of the escalator. Summary of the invention

[0004] Based on this, it is necessary to provide a step abnormality detection device, a detection method and an escalator to address the above problems, which can detect step abnormalities in a timely manner and help improve the safety of the escalator.

[0005] On the one hand, a step abnormality detection device is provided, which is applied to an escalator, wherein the escalator comprises steps, a main machine, a running guide rail and a skirt board, wherein the running guide rail extends along a set direction, the steps are movably arranged on the running guide rail, the main machine is used to drive the steps to move relative to the running guide rail along the set direction, the skirt board is located on one side of the steps in the lateral direction, and a groove is provided on one side of the steps facing the skirt board, wherein the step abnormality detection device comprises:

[0006] Distance measuring sensor,

[0007] The distance sensor is arranged on one side of the skirt board, the detection surface of the distance sensor faces the step, and the distance sensor can output a pulse signal. When the floating height of the step exceeds a set height H1, the distance sensor can detect the part of the step outside the groove and output a first level pulse; when the step swings a set distance L1 in the lateral direction toward the skirt board, the distance sensor can detect the bottom of the groove and the part of the step outside the groove and output the first level pulse; when there is a foreign object between the step and the skirt board and when the foreign object passes through the detection area of ​​the distance sensor, the distance sensor can detect the foreign object and output the first level pulse;

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

[0009] An analysis controller, the analysis controller is respectively connected to the distance measuring sensor and the host speed measuring device, and the analysis controller can receive the host pulse waveform output by the host speed measuring device and can receive the pulse signal output by the distance measuring sensor;

[0010] During the operation of the host, the analysis controller compares the received first level pulse with the host pulse waveform, and outputs an abnormal signal if the number of host pulses in the host pulse waveform exceeds a set value within the duration of the first level pulse.

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

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

[0013] In one of the embodiments, the groove has a groove depth of 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 boards, the two skirt boards are spaced apart, the step is located between the two skirt boards, the two skirt boards are both provided with the ranging sensors, and the grooves are provided on both sides of the step facing the two skirt boards.

[0016] In one of the embodiments, the skirt plate is provided with a mounting groove, the groove opening of the mounting groove faces the step, and the distance measuring sensor is installed in the mounting groove.

[0017] In one of the embodiments, a cleaning component is further included, and the cleaning component is used to clean the side of the step facing the skirt board.

[0018] On the other hand, an escalator is also provided, comprising steps, a main machine, an operating guide rail, a skirt board and the above-mentioned step abnormality detection device, wherein the operating guide rail extends along a set direction, the steps are movably arranged on the operating guide rail, the main machine is used to drive the steps to move relative to the operating guide rail along the set direction, the skirt board is located on one side of the steps in the horizontal direction, and a plurality of grooves are arranged on one side of the steps facing the skirt board.

[0019] On the other hand, a step abnormality detection method is also provided.

[0020] A distance measuring sensor, a host speed measuring device, and an analysis controller respectively connected to the distance measuring sensor and the host speed measuring device are provided. The host speed measuring device is used to detect the output speed of the host and can output a host pulse waveform with a periodicity at the output speed. A groove is provided on one side of the step facing the skirt of the escalator. The step abnormality detection method comprises the following steps:

[0021] When the distance measuring sensor detects that the step is located outside the groove, or detects the bottom of the groove, or detects that there is 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 number of host pulses in the host pulse waveform exceeds the set value within the continuous interval of the first level pulse, an abnormal signal is output.

[0022] The above-mentioned step abnormality detection device, through the mutual cooperation of the distance measuring sensor, the main engine speed meter, the analysis controller and the steps, can promptly detect when the steps float up, swing laterally, and when there are foreign objects between the steps and the skirt board, and output abnormal signals in time through the analysis controller. In this way, the staff can inspect and repair the escalator in time, effectively improving the safety of the escalator and reducing component damage and personal injury accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the structure of the ranging sensor, steps and skirts in some embodiments of the present application.

[0024] Figure 2 Schematic diagram of the distribution of steps and ranging sensors in some embodiments of the present application.

[0025] Figure 3 It is a side view of a step in some embodiments of the present application.

[0026] Figure 4 This is a schematic diagram of the structure of steps, brackets, moving wheels and cleaning components in some embodiments of the present application.

[0027] Figure 5 It is the pulse waveform of the host and the pulse signal output by the ranging sensor in some embodiments of the present application.

[0028] In the figure: 1, step; 101, groove; 2, skirt plate; 201, mounting groove; 3, distance sensor; 4, bracket; 5, moving wheel group; 501, first wheel; 502, second wheel; 6, cleaning component. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0030] In the description of the present 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 the present 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 the present application.

[0031] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0032] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0033] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the 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. The first feature being "below", "below" and "below" the 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.

[0034] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, 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 implementation method.

[0035] See also Figure 1 , Figure 2 and Figure 3 , Figure 1 A schematic diagram of the structure of a distance measuring sensor, a step and a skirt plate in some embodiments of the present application is shown; Figure 2 A schematic diagram showing the distribution of steps and ranging sensors in some embodiments of the present application is shown; Figure 3The side view of the steps in some embodiments of the present application is shown. An escalator provided in one embodiment of the present application includes a step 1, a main engine (not shown in the figure), a running rail (not shown in the figure), a skirt board 2, and a step abnormality detection device. Among them, the running rail extends along a set direction, the step 1 is movably arranged on the running rail, the main engine is used to drive the step 1 to move relative to the running rail along the set direction, the skirt board 2 is located on one side of the step 1 in the lateral direction, and a plurality of grooves 101 are arranged on the side of the step 1 facing the skirt board 2. The step abnormality detection device includes a distance sensor 3, a main engine speed meter (not shown in the figure), and an analysis controller (not shown in the figure). The distance sensor 3 is arranged on one side of the skirt board 2, and the detection surface of the distance sensor 3 faces the step 1. The distance sensor 3 can output a pulse signal. Among them, the pulse signal output by the distance sensor includes 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 floating height of the step 1 exceeds the set height H1, the distance sensor 3 can detect the part of the step 1 outside the groove 101 and output a high-level pulse; when the step 1 swings a set distance L1 in the direction close to the skirt board 2 in the horizontal direction, the distance sensor 3 can detect the bottom of the groove 101 and the part of the step 1 outside the groove 101; when there is a foreign object between the step 1 and the skirt board 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 tachometer 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 respectively connected to the distance sensor 3 and the host tachometer for communication. In actual implementation, the analysis controller is respectively connected to the distance sensor 3 and the host tachometer through a transmission line, so that the analysis controller is respectively connected to the distance sensor 3 and the host tachometer for communication. The analysis controller can receive the host pulse waveform output by the host tachometer and can receive the pulse output by the distance sensor 3. During the operation of the host, the analysis controller compares the high-level pulse output by the ranging sensor with the host pulse waveform. If the high-level pulse output by the ranging sensor is within the continuous interval and the number of host pulses in the host pulse waveform exceeds the set value, an abnormal signal is output.

[0036] Since the distance sensor 3 is arranged on the skirt board 2, the position of the distance sensor 3 is fixed, and the detection area of ​​the distance sensor 3 is located on the side of the skirt board 2 facing the step 1. When the step 1 moves along the set direction relative to the running guide rail, it will pass through the detection area. Under normal conditions, the step 1 can be detected by the distance sensor 3 when the part of the step 1 facing the skirt board 2 except the groove 101 passes through the detection area. When the distance sensor 3 senses the real object (that is, senses the step 1), it outputs a high-level pulse and transmits it to the analysis controller. Since the detection distance of the distance sensor 3 is limited, the distance sensor 3 cannot detect the bottom of the groove 101 when the groove 101 (the groove 101 is a virtual body) passes through the detection area. At this time, the distance sensor 3 outputs a low-level pulse and transmits it to the analysis controller. When the floating height of the escalator exceeds the set height H1, the position of the groove 101 will be shifted upward. 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 (that is, the groove 101 passes from above 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 as a whole, the distance sensor 3 has no low-level pulse output, which makes the stroke of the output high-level pulse longer; when the step 1 swings horizontally toward the skirt board 2 by a set distance L1, it will drive the groove 101 to move horizontally toward the distance sensor 3 as a whole, shortening the distance between the bottom of the groove 101 and the distance sensor 3. The distance between the steps 1 and the skirt 2 is determined by the distance sensor 3. When the groove 101 passes through the detection area of ​​the sensor, the distance sensor 3 can detect the bottom of the groove 101. Therefore, in the process of the step 1 passing through the detection area as a whole, the distance 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 distance sensor 3 has no low-level pulse output, so that the stroke of the output high-level pulse will be 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. Therefore, in the process of the step 1 passing through the detection area as a whole, the distance sensor 3 has no low-level pulse output, so that the stroke of the output high-level pulse will be longer.

[0037] It can be understood that the host is connected to the step 1 by transmission, and the operation of the host drives the step 1 to move relative to the running guide rail along the set direction. The horizontal axis in the host pulse waveform is the stroke of the host operation, and the horizontal axis in the host pulse waveform is the pulse voltage value of the host. When the step 1 is operating normally, the high-level pulse in the host pulse waveform forms a certain relationship with the high-level pulse output by the ranging sensor 3. The number of high-level pulses in the host pulse waveform is constant within the continuous interval of the high-level pulse output by the ranging sensor; when the step 1 is abnormal, the stroke of the high-level pulse output by the ranging sensor 3 will become longer, and the high-level pulse output by the ranging sensor will increase within the continuous interval. When the number of host pulses in the host pulse waveform exceeds the set value within the continuous interval of the high-level pulse output by the ranging sensor 3, it indicates that the step is abnormal.

[0038] For easier understanding, see Figure 5 When step 1 is normal, the high-level pulse output by the ranging sensor 3 is in the continuous interval, and the number of high-level pulses in the host pulse waveform is 1 (taking the set value of 1 as an example). When the step is abnormal (in the two dotted line intervals), the stroke of the high-level pulse output by the ranging sensor 3 becomes longer. Therefore, within the continuous interval of the high-level pulse output by the ranging sensor 3, the number of high-level pulses in the host pulse waveform is 3 (exceeding the set value).

[0039] This type of step abnormality detection device, through the mutual cooperation of the distance sensor 3, the main engine speed meter, the analysis controller and the step 1, can promptly detect when the step 1 floats up, swings laterally, and there are foreign objects between the step 1 and the skirt board 2, and output abnormal signals in time through the analysis controller, so that the staff can promptly inspect and repair the escalator, effectively improving the safety of the escalator and reducing component damage and personal injury accidents.

[0040] It should be noted that the “lateral direction” in this description refers to the horizontal direction perpendicular to the running direction of the escalator.

[0041] In some embodiments, the ranging sensor 3 is a laser sensor, the diameter of the laser sensor's light spot is d, the notch of the groove 101 is rectangular, and the notch width of the groove 101 is W, wherein the diameter d of the light spot and the notch width W of the groove 101 satisfy the following relationship: W>d, and when the step 1 is in a normal state, when the groove 101 passes through the detection area, the light spot of the laser sensor can fall completely into the interior of the groove 101.

[0042] The diameter d of the light spot, the slot 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, when the step 1 passes through the detection area as a whole, it can be ensured that the light spot will not partially fall into the interior of the groove 101.

[0043] The groove depth of the groove 101 is H2, wherein the groove depth H2 and the set distance L1 satisfy the following relationship: H2 ≥ L1. It should be noted that the groove bottom of the groove 101 refers to: the side of the groove 101 facing the notch: the groove depth of the groove 101 refers to the distance between the groove bottom of the groove 101 and the notch end of the groove 101. Setting H2 ≥ L1 avoids the laser sensor from failing to detect the step 1 due to the excessive lateral swing distance, which is beneficial to improving the reliability of the step abnormality detection device.

[0044] In actual implementation, along the running direction of the escalator, the length of the portion of the step 1 that floats above the set height H1 is L3, and the length of the notch of the groove 101 is L4, where L3>L4.

[0045] Furthermore, 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. In actual implementation, when step 1 is in a normal state, the distance between the bottom of the groove 101 and the distance measuring sensor 3 is L0, L0>L1, and the spacing between step 1 and skirt 2 is less than or equal to the maximum detection distance L2 of the laser sensor, so that when the step is in a normal state, the laser sensor can detect the part of step 1 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 when step 1 swings laterally.

[0046] Understandably, referring to Figure 4 The step 1 is arranged on the running guide rail through a supporting assembly, the supporting assembly includes a bracket 4 and a moving wheel group 5, the step is arranged on the top of the supporting assembly, the moving wheel group 5 is arranged at the bottom of the bracket 4, and the moving wheel group 5 has two groups, each group of moving wheel groups 5 includes 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, and the first wheel 501 and the second wheel 502 are both installed on the bracket 4. The step 1 may float up with either the first wheel 501 and the second wheel 502 in the two groups of moving wheel groups 5 as a fulcrum due to a fault.

[0047] In some embodiments, there are two skirt boards 2, which are spaced apart in the transverse direction, and the step 1 is located between the two skirt boards 2. The two skirt boards 2 are provided with distance sensors 3, and grooves 101 are provided on both sides of the step 1 facing the two skirt boards 2. The distance sensors 3 on the two skirt boards 2 can detect the two sides of the step 1 that are opposite to each other in the transverse direction, so that the step 1 can be detected by the distance sensor 3 on the corresponding skirt board 2 when it swings in the transverse direction toward any skirt board 2, thereby preventing the risk of missed detection. The distance sensors 3 on the two skirt boards 2 can be symmetrically arranged or asymmetrically arranged.

[0048] In actual implementation, in order to improve the step abnormality detection device, a plurality of grooves 101 are provided on the side of the step 1 facing the skirt board 2, and the grooves 101 on the same side are distributed at intervals.

[0049] In some embodiments, the skirt board 2 is recessed with a mounting groove 201, the notch of the mounting groove 201 faces the step 1, and the distance measuring sensor 3 is installed in the mounting groove 201. The mounting groove 201 provides a space for accommodating the distance measuring sensor 3, so that the distance measuring sensor 3 does not protrude from the side of the skirt board 2 facing the step 1, thereby preventing the step 1 from colliding with the distance measuring sensor 3 due to the lateral swinging of the step 1.

[0050] It is understandable that after the escalator has been used for a long time, some dust and other debris are retained on the side of the step 1 facing the skirt board 2, thereby affecting the detection of the ranging detector. To address this problem, the step abnormality detection device also includes a cleaning component 6, which is used to clean the side of the step 1 facing the skirt board 2. By cleaning the step 1 retained on the side of the skirt board 2 by the cleaning component 6, dust and other debris can be prevented from affecting the detection of the ranging detector. In actual implementation, the cleaning component 6 is installed on the horizontal side of the step 1 through a mounting frame, and the cleaning component 6 avoids the position of the ranging sensor 3 to prevent the cleaning component 6 from affecting the detection of the ranging sensor 3.

[0051] Reference Figure 1 , Figure 2 and Figure 3In some embodiments, a step abnormality detection method is also provided, which is applied to the step abnormality detection device of any of the above structures. The step abnormality detection method provides a distance sensor 3, a host speed meter, and an analysis controller that is respectively connected to the distance sensor 3 and the host speed meter. The host speed meter is used to detect the output speed of the host and can output a host pulse waveform with a periodic speed output. A groove 101 is provided on the side of the step 1 facing the skirt 2 of the escalator. The step abnormality 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, or detects that there is a foreign object between the step 1 and the skirt 2, a high-level pulse is output and transmitted to the analysis controller, and the analysis controller compares the received high-level pulse with the host pulse waveform. If the high-level pulse output by the distance sensor 3 received by the analysis controller is within the continuous interval, and the number of host pulses in the host pulse waveform exceeds the set value, then an abnormal signal is output. Under normal conditions, all parts of step 1 except groove 101 on the side of step 1 facing skirt 2 can be detected by distance sensor 3 when passing through the detection zone. When distance sensor 3 senses a real object (i.e., step 1), it outputs a high-level pulse and transmits it to the analysis controller. Since the detection distance of distance sensor 3 is limited, distance sensor 3 cannot detect the bottom of groove 101 (groove 101 is a virtual body) when groove 101 passes through the detection zone. At this time, distance sensor 3 outputs a low-level pulse and transmits it to the analysis controller. Therefore, step 1 will output a continuous periodic pulse signal when operating normally. When the step 1 floats up, the groove 101 on the step 1 will be driven to deflect upward as a whole. When the step 1 moves relative to the running guide rail along the set direction, the groove 101 on the step 1 will not fall into the detection area of ​​the distance measuring sensor 3. Therefore, when the step 1 passes through the detection area as a whole, the distance measuring sensor 3 has no low-level pulse output, which makes the stroke of the high-level pulse output by the distance measuring sensor 3 longer; when the step 1 swings horizontally, the distance between the bottom of the groove 101 and the distance measuring sensor 3 decreases, and the distance measuring sensor 3 will be detected when the step 1 passes through the detection area as a whole. The distance 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 distance sensor 3 has no low-level pulse output, so that the stroke of the output high-level pulse will be 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 as a whole, the distance sensor 3 has no low-level pulse output, which makes the stroke of the high-level pulse output by the distance sensor 3 longer.When the step 1 is in normal operation, the high level pulse in the host pulse waveform forms a certain relationship with the high level pulse output by the ranging sensor 3. When the high level pulse output by the ranging sensor 3 is in the continuous interval, the number of high level pulses in the host pulse waveform is constant. When the step is abnormal, the stroke of the high level pulse output by the ranging sensor 3 will become longer, and the number of high level pulses in the host pulse waveform will increase in the continuous interval of the high level pulse output by the ranging sensor 3. When the number of host pulses in the host pulse waveform exceeds the set value in the continuous interval of the high level pulse output by the ranging sensor 3, it indicates that the step is abnormal. Through this step abnormality detection method, not only the floating and lateral swing of the step 1 can be detected, but also the foreign matter between the step 1 and the skirt 2 can be detected, which is conducive to improving the safety of the escalator, and the abnormality of the step 1 can be found in time, so that the staff can repair it in time, and reduce the probability of component damage and personal injury accidents.

[0052] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, 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.

[0053] The above embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A step abnormality detection device, applied to an escalator, the escalator comprising steps, a main machine, a running rail and a skirt, the running rail extending along a set direction, the steps being movably arranged on the running rail, the main machine being used to drive the steps to move relative to the running rail along the set direction, the skirt being located on one side of the steps in the lateral direction, characterized in that: A groove is provided on one side of the step facing the skirt plate, and the step abnormality detection device comprises: A distance measuring sensor, the distance measuring sensor is arranged on one side of the skirt board, the detection surface of the distance measuring sensor faces the step, the distance measuring sensor can output a pulse signal, when the floating height of the step exceeds a set height H1, the distance measuring sensor can detect the part of the step outside the groove and output a first level pulse; when the step swings a set distance L1 in the lateral direction toward the skirt board, the distance measuring sensor can detect the bottom of the groove and the part of the step outside the groove and output the first level pulse; when there is a foreign object between the step and the skirt board and when 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, which is used to detect the output speed of the host and can output a periodic host pulse waveform according to the output speed; and An analysis controller, the analysis controller is respectively connected to the distance measuring sensor and the host speed measuring device, and the analysis controller can receive the host pulse waveform output by the host speed measuring device and can receive the pulse signal output by the distance measuring sensor; During the operation of the host, the analysis controller compares the received first level pulse with the host pulse waveform, and outputs an abnormal signal if the number of host pulses in the host pulse waveform exceeds a set value within the duration of the first level pulse.

2. The step abnormality detection device according to claim 1, characterized in that: The distance measuring sensor is a laser sensor, the diameter of the light spot of the laser sensor is d, the notch of the groove is rectangular, and the notch width of the groove is W, wherein the diameter d of the light spot and the notch width W of the groove satisfy the following relationship: W>d.

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

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

5. The step abnormality 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 abnormality detection device according to any one of claims 1 to 5, characterized in that: There are two skirt boards, which are spaced apart from each other. The step is located between the two skirt boards. The distance measuring sensors are arranged on the two skirt boards, and the grooves are arranged on both sides of the step facing the two skirt boards.

7. The step abnormality detection device according to any one of claims 1 to 5, characterized in that: The skirt plate is provided with a mounting groove, the groove opening of the mounting groove faces the step, and the distance measuring sensor is installed in the mounting groove.

8. The step abnormality detection device according to any one of claims 1 to 5, characterized in that: Also included is a cleaning component, which is used to clean the step toward the skirt board.

9. An escalator, characterized in that: It comprises a step, a main machine, a running guide rail, a skirt plate and the step abnormality detection device according to any one of claims 1 to 8, wherein the running guide rail extends along a set direction, the step is movably arranged on the running guide rail, the main machine is used to drive the step to move relative to the running guide rail along the set direction, the skirt plate is located on one side of the step in the lateral direction, and a plurality of grooves are arranged on the side of the step facing the skirt plate.

10. A step anomaly detection method, characterized in that: A distance measuring sensor, a host speed measuring device, and an analysis controller respectively connected to the distance measuring sensor and the host speed measuring device are provided. The host speed measuring device is used to detect the output speed of the host and can output a host pulse waveform with a periodicity at the output speed. A groove is provided on one side of the step facing the skirt of the escalator. The step abnormality detection method comprises the following steps: When the distance measuring sensor detects that the step is located outside the groove, or detects the bottom of the groove, or detects that there is 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 number of host pulses in the host pulse waveform exceeds the set value within the continuous interval of the first level pulse, an abnormal signal is output.

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