Escalator chain elongation detection method, system, device

Abstract

The application discloses a escalator chain elongation detection method, system and device, the escalator chain elongation detection method detects the relative displacement of the chain when the escalator is running, and the analog quantity of the first displacement is collected in real time to obtain the first displacement waveform, the elongation of the chain is calculated according to the reference value and the first characteristic value generated by the characteristic analysis of the first displacement waveform, and the real-time detection of the escalator chain elongation is realized; the alarm signal is generated when the elongation reaches the preset threshold value, timely alarm is realized when the escalator chain elongation reaches the preset threshold value, the safety risk of passengers is reduced, and the escalator fault can be conveniently and timely investigated. The application can be widely applied to the technical field of detection.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of detection, in particular to a chain elongation detection method, system and device for escalators. BACKGROUND

[0002] With the application of intelligent products and real-time early warning systems in the escalator industry, the demand for online monitoring of the status of various key components of escalators has been proposed, including online monitoring of escalator chains. Escalator chains include main drive chains, handrail drive chains, etc. As an important transmission component, escalator chains will cause chain loosening when they are accidentally elongated, which may cause abnormal noise and step running jitter of the escalator, and even cause problems such as tooth skipping and chain disengagement during chain running, thereby affecting passenger safety. SUMMARY

[0003] The purpose of the present application is to at least partially solve one of the technical problems existing in the prior art.

[0004] To this end, the embodiments of the present application provide a chain elongation detection method, system and device for escalators, which realizes real-time detection and early warning of chain elongation for escalators.

[0005] In order to achieve the above technical purpose, the technical solutions adopted by the embodiments of the present application include:

[0006] On the one hand, the embodiments of the present application provide a chain elongation detection method for escalators, comprising the following steps:

[0007] Detecting a first displacement amount, the first displacement amount being a relative displacement amount of the chain when the escalator is running;

[0008] Real-time acquisition of an analog quantity of the first displacement amount to obtain a first displacement amount waveform;

[0009] Performing feature analysis on the first displacement amount waveform to generate a first feature value, the feature analysis including effective data filtering and feature calculation;

[0010] Calculating an elongation amount according to the first feature value and a reference value;

[0011] Confirming that the elongation amount reaches a preset threshold to generate an alarm signal.

[0012] The escalator chain elongation detection method provided by the embodiment of the application detects the relative displacement of the chain when the escalator is running, collects the analog quantity of the first displacement in real time, obtains the first displacement waveform, calculates the elongation of the chain according to the reference value and the first characteristic value generated by the characteristic analysis of the first displacement waveform, and realizes real-time detection of the elongation of the chain. The method generates an alarm signal when the elongation reaches the preset threshold, realizes timely alarm when the elongation of the chain reaches the preset threshold, reduces the safety risk of passengers, and facilitates timely troubleshooting of the escalator.

[0013] In addition, the escalator chain elongation detection method according to the above embodiment of the application can further have the following additional technical features.

[0014] Further, in the escalator chain elongation detection method according to the embodiment of the application, the detection of the first displacement includes:

[0015] The initial state of the chain is obtained, and the initial state includes a running direction;

[0016] The second displacement is detected according to the initial state, and the second displacement is the real-time displacement of the chain;

[0017] The first displacement is calculated according to the second displacement and a third displacement, and the third displacement is the initial displacement of the chain.

[0018] Further, in an embodiment of the application, the obtaining of the initial state of the chain includes:

[0019] The running direction is obtained according to the reference value.

[0020] Further, in an embodiment of the application, before the running direction is obtained according to the reference value, the method further includes obtaining the reference value, specifically including:

[0021] The third displacement is detected;

[0022] The analog quantity of the third displacement is collected to obtain a second displacement waveform;

[0023] The second displacement waveform is subjected to characteristic analysis to generate a second characteristic value;

[0024] The second characteristic value is subjected to weighted calculation to obtain the reference value.

[0025] Further, in an embodiment of the application, the method further includes:

[0026] In response to adjusting the chain, the step of detecting the third displacement is returned.

[0027] Further, in one embodiment of the present application, the method further comprises:

[0028] Confirming that the elongation does not reach a preset threshold, generating a normal state signal, the normal state signal being used to indicate that the chain is in a normal state.

[0029] Further, in one embodiment of the present application, the method further comprises:

[0030] Reporting the alarm signal.

[0031] In another aspect, an embodiment of the present application provides a chain elongation detection system for escalators, comprising:

[0032] A first module for detecting a first displacement, the first displacement being a relative displacement of the chain when the escalator is running;

[0033] A second module for collecting an analog quantity of the first displacement in real time, to obtain a first displacement waveform;

[0034] A third module for performing feature analysis on the first displacement waveform, to generate a first feature value, the feature analysis including calculating an average value or a root mean square value;

[0035] A fourth module for calculating an elongation according to the first feature value and a reference value;

[0036] A fifth module for confirming that the elongation reaches a preset threshold, to generate an alarm signal.

[0037] In another aspect, an embodiment of the present application provides a chain elongation detection device for escalators, comprising:

[0038] At least one processor;

[0039] At least one memory for storing at least one program;

[0040] When the at least one program is executed by the at least one processor, the at least one processor implements the chain elongation detection method for escalators.

[0041] The advantages and beneficial effects of the present application will be partially given in the following description, partially will become obvious from the following description, or will be understood by the practice of the present application:

[0042] The embodiment of the application realizes real-time detection of the elongation of the escalator chain by detecting the relative displacement amount of the chain during the operation of the escalator, collecting the analog quantity of the first displacement amount in real time, obtaining the first displacement amount waveform, and calculating the elongation of the chain according to the reference value and the first characteristic value generated by the feature analysis of the first displacement amount waveform; the timely alarm when the elongation of the escalator chain reaches the preset threshold is realized by generating an alarm signal when the elongation reaches the preset threshold, the safety risk of the passengers is reduced, and the escalator failure is conveniently and timely investigated. BRIEF DESCRIPTION OF DRAWINGS

[0043] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following introduces the drawings of the related technical solutions in the embodiments of the present application or the prior art. It should be understood that the drawings in the following introduction are only for the convenience of clearly describing some embodiments of the technical solutions of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0044] Figure 1 The flowchart of the specific embodiment of the escalator chain elongation detection method of the present application is shown in the figure.

[0045] Figure 2 The horizontal line diagram of the chain displacement detection of the specific embodiment of the escalator chain elongation detection method of the present application is shown in the figure.

[0046] Figure 3 The second displacement waveform diagram of the specific embodiment of the escalator chain elongation detection method of the present application is shown in the figure.

[0047] Figure 4 The structural diagram of the specific embodiment of the escalator chain elongation detection system of the present application is shown in the figure.

[0048] Figure 5 The structural diagram of the specific embodiment of the escalator chain elongation detection device of the present application is shown in the figure. DETAILED DESCRIPTION

[0049] The embodiments of the present application are described in detail below, and the examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application. The step numbers in the following embodiments are only set for the convenience of description and explanation, and the order between the steps is not limited in any way, and the execution order of each step in the embodiments can be adaptively adjusted according to the understanding of those skilled in the art.

[0050] The terms "first", "second", "third", and "fourth" and the like in the description and in the claims of the present application and the accompanying drawings are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. The terms "comprises", "comprising", "includes", "including" and the like are to be construed open- ended, meaning that they include the listed steps or elements, but not excluding other steps or elements. For example, a process, method, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements, but can include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

[0051] Reference to "an embodiment" or "the embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the application. The appearances of the phrase "in one embodiment" or "in an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive.

[0052] With the application of intelligent products and real-time warning systems in the escalator industry, the demand for online monitoring of the status of each key component of the escalator has been proposed, including online monitoring of the escalator chain. The escalator chain includes the main drive chain, handrail belt drive chain, etc. As an important transmission component, the escalator chain will cause the chain to loosen when it unexpectedly elongates, which may cause abnormal noise and step vibration of the escalator, and even cause tooth skipping and chain disconnection during chain operation, thereby affecting the safety of passengers. Therefore, the present application proposes an escalator chain elongation detection method, system and device, which detects the relative displacement of the chain during escalator operation, and real-time collects the analog quantity of the first displacement to obtain the first displacement waveform. The elongation of the chain is calculated according to the reference value and the first characteristic value generated by the feature analysis of the first displacement waveform, realizing real-time detection of the elongation of the escalator chain. By generating an alarm signal when the elongation reaches a preset threshold, timely alarm is realized when the elongation of the escalator chain reaches the preset threshold, reducing the safety risk of passengers and facilitating timely troubleshooting of escalator failures.

[0053] A escalator chain elongation detection method, system and device according to an embodiment of the present application will be described in detail below with reference to the accompanying drawings. First, a escalator chain elongation detection method according to an embodiment of the present application will be described with reference to the accompanying drawings.

[0054] Reference Figure 1The embodiment of the present application provides a chain elongation detection method for escalators. The chain elongation detection method for escalators can be applied to a terminal, a server, software running in the terminal or the server, and the like. The terminal can be a tablet computer, a notebook computer, a desktop computer, and the like, but is not limited to this. The server can be a physical server, a server cluster or a distributed system composed of multiple physical servers, a cloud server providing cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communication, middleware services, domain name services, security services, content distribution networks (CDNs), and basic cloud computing services such as big data and artificial intelligence platforms. The chain elongation detection method for escalators mainly includes the following steps:

[0055] S101, detecting a first displacement amount;

[0056] The first displacement amount is the relative displacement amount of the chain when the escalator is running.

[0057] S101 can be further divided into the following steps S1011-S1013:

[0058] Step S1011, obtaining an initial state of the chain;

[0059] The initial state includes a running direction.

[0060] Specifically, in the embodiment of the present application, the running direction (initial state) of the chain is obtained according to a reference value.

[0061] In the embodiment of the present application, the obtaining of the reference value specifically includes the following steps:

[0062] 1) detecting a third displacement amount, wherein the third displacement amount is an initial displacement amount of the chain;

[0063] 2) collecting an analog quantity of the third displacement amount to obtain a second displacement amount waveform;

[0064] 3) performing feature analysis on the second displacement amount waveform to generate a second feature value;

[0065] 4) performing weighted calculation on the second feature value to obtain the reference value.

[0066] In the embodiment of the present application, if the chain is re-adjusted, the initial displacement amount of the chain, i.e., the third displacement amount, is re-detected, and the reference value is updated according to the third displacement amount.

[0067] The horizontal line of the chain displacement detection is as shown in Figure 2 Optionally, the chain displacement detection is performed by a vertical detection Figure 2 horizontal line to obtainFigure 3 the second displacement amount waveform shown.

[0068] In the embodiment of the present application, the feature analysis includes effective data filtering and feature calculation, and the feature calculation is optional average value calculation or root mean square value calculation.

[0069] Optionally, in an embodiment of the present application, an array type is provided, and the array corresponding to the array type is used to store effective data obtained after effective data filtering on the detected data. When the capacity of the array is full, feature calculation is performed on the effective data in the array to obtain a feature value; when the capacity of the array is full and new effective data enters the array, the earliest effective data in the array is removed, and the new effective data is filled into the array, so that real-time calculation of the feature value is realized.

[0070] Optionally, in an embodiment of the present application, a feature value curve is obtained by fitting calculation on the feature value.

[0071] Step S1012, detecting a second displacement amount according to the initial state, the second displacement amount being a real-time displacement amount of the chain;

[0072] It can be understood that when the running direction of the chain is the clockwise direction, the upper chain is in the straightened state, the lower chain is in the relaxed state and slightly presents the arc-shaped downward deflection, and if the chain appears the elongation phenomenon, the lower chain will further downwardly deflect; when the running direction of the chain is the counterclockwise direction, the lower chain is in the straightened state, the upper chain is in the relaxed state and slightly presents the arc-shaped downward deflection, and if the chain appears the elongation phenomenon, the upper chain will further downwardly deflect.

[0073] Specifically, in the embodiment of the present application, when the running direction of the chain is the clockwise direction, the real-time displacement amount of the lower chain is detected as the second displacement amount; when the running direction of the chain is the counterclockwise direction, the real-time displacement amount of the upper chain is detected as the second displacement amount.

[0074] Step S1013, calculating the first displacement amount according to the second displacement amount and the third displacement amount.

[0075] Specifically, the relative displacement amount of the chain during the running of the escalator, i.e., the first displacement amount, is calculated according to the second displacement amount detected in step S1012 and the initial displacement amount of the chain.

[0076] S102, collecting an analog quantity of the first displacement amount in real time to obtain a first displacement amount waveform;

[0077] According to step S1012, when the running direction of the chain is the clockwise direction, if the chain appears the elongation phenomenon, the lower chain further downwardly deflects, so that the second displacement amount is greater than the initial displacement amount of the chain, and the third displacement amount is less than the initial displacement amount of the chain. Figure 3The curve part shown is offset upward; when the running direction of the chain is clockwise, if the chain is elongated, the upper chain is further lowered, so that Figure 3 The curve part shown is offset downward.

[0078] Optionally, the analog quantity that can be collected by an embodiment of the present application includes a 0-5V voltage signal and a 4-20mA current signal.

[0079] S103, performing feature analysis on the first displacement waveform to generate a first feature value;

[0080] The process of performing feature analysis on the first displacement waveform to generate the first feature value is the same as the principle of generating the second feature value in step S1011, and will not be repeated.

[0081] According to step S102, when the running direction of the chain is clockwise, if the chain is elongated, Figure 3 The curve part shown is offset upward, and the corresponding first feature value is also offset upward and becomes larger compared with the second feature value; when the running direction of the chain is counterclockwise, if the chain is elongated, Figure 3 The curve part shown is offset downward, and the corresponding first feature value is also offset downward and becomes smaller compared with the second feature value.

[0082] S104, calculating an elongation amount according to the first feature value and a reference value;

[0083] It can be understood that if the chain is not elongated, the first feature value obtained in real time is consistent with the reference value; if the chain is elongated, the elongation amount of the chain can be calculated according to the first feature value obtained in real time and the reference value.

[0084] S105, confirming that the elongation amount reaches a preset threshold value, and generating an alarm signal.

[0085] In an embodiment of the present application, it is confirmed that the elongation amount does not reach the preset threshold value, and a normal state signal is generated, wherein the normal state signal is used to indicate that the chain is in a normal state.

[0086] In an embodiment of the present application, after the alarm signal is generated, the alarm signal is reported to remind that the chain of the escalator is elongated.

[0087] Optionally, in an embodiment of the present application, the reporting mode of the alarm signal includes RS232, RS485 and CAN.

[0088] According to the escalator chain elongation detection method described in steps S101-S105, the relative displacement amount of the chain when the escalator is running is detected, the analog quantity of the first displacement amount is collected in real time, the first displacement amount waveform is obtained, the elongation amount of the chain is calculated according to the first characteristic value generated by the characteristic analysis of the first displacement amount waveform and the reference value, and the real-time detection of the elongation of the escalator chain is realized. The alarm signal is generated when the elongation amount reaches the preset threshold, the timely alarm when the elongation of the escalator chain reaches the preset threshold is realized, the safety risk of the passengers is reduced, and the escalator fault can be conveniently and timely investigated.

[0089] Secondly, an escalator chain elongation detection system according to an embodiment of the application is described with reference to the accompanying drawings.

[0090] Figure 4 is a structural schematic diagram of an escalator chain elongation detection system according to an embodiment of the application.

[0091] The system specifically includes:

[0092] The first module 401 is configured to detect the first displacement amount, and the first displacement amount is the relative displacement amount of the chain when the escalator is running.

[0093] The second module 402 is configured to collect the analog quantity of the first displacement amount in real time and obtain the first displacement amount waveform.

[0094] The third module 403 is configured to perform characteristic analysis on the first displacement amount waveform and generate the first characteristic value, and the characteristic analysis includes effective data filtering and characteristic calculation.

[0095] The fourth module 404 is configured to calculate the elongation amount according to the first characteristic value and the reference value.

[0096] The fifth module 405 is configured to confirm that the elongation amount reaches the preset threshold and generate an alarm signal.

[0097] It can be seen that the contents in the method embodiment are applicable to the system embodiment, the system embodiment specifically realizes the same functions as the method embodiment, and achieves the same beneficial effects as the method embodiment.

[0098] With reference to Figure 5 The escalator chain elongation detection device provided in the embodiment of the application includes:

[0099] At least one processor 501;

[0100] At least one memory 502 is configured to store at least one program.

[0101] When the at least one program is executed by the at least one processor 501, the at least one processor 501 is caused to implement the escalator chain elongation detection method of steps S101-S105.

[0102] Similarly, the contents in the above method embodiments are all applicable to the present device embodiments, the present device embodiments specifically implement the functions same as the above method embodiments, and achieve the same beneficial effects as the above method embodiments.

[0103] In some alternative embodiments, the functions / operations mentioned in the block diagram can not occur in the order mentioned in the operation diagram. For example, depending on the functions / operations involved, two blocks shown in succession can actually be executed substantially concurrently or the blocks can sometimes be executed in reverse order. Furthermore, the embodiments presented and described in the flowcharts in the present application are provided by way of example only, and are not intended to provide an exhaustive description of techniques for implementing the present application. The disclosed methods are not limited to the operations and logical flows presented in this specification. Alternative embodiments are possible, in which the order of various operations is changed and in which sub-operations described as part of a larger operation are independently executed.

[0104] Furthermore, although the present application is described in the context of functional modules, it should be understood that one or more of the functions and / or features can be integrated in a single physical device and / or software module, or one or more functions and / or features can be implemented in separate physical devices or software modules, unless otherwise specified. It can also be understood that a detailed discussion of the actual implementation of each module is unnecessary to an understanding of the present application. Rather, the properties, functions and internal relationships of the various functional modules disclosed in the devices herein are considered to be within the ordinary skill of an engineer in view of the present disclosure. Therefore, the present application, as set forth in the claims, can be implemented without undue experimentation by one of ordinary skill in the art using the ordinary techniques, as appreciated by those skilled in the art. It can also be understood that the disclosed specific concepts are merely illustrative and are not intended to limit the scope of the present application, which is defined by the full scope of the appended claims and their equivalents.

[0105] The logic and / or steps represented in the flow diagrams or otherwise described herein, for example, can be embodied in non-transitory computer- readable media, executed by a program executing system, apparatus, or device, such as a computer-based system, a processor-based system, or other system that can fetch the program (from the system, apparatus, or device) and execute the program, or in conjunction with such a program executing system, apparatus, or device. For the purposes of this specification, a "computer-readable medium" can be any apparatus that can contain, store, communicate, propagate, or transport the program for use by or in connection with the program executing system, apparatus, or device.

[0106] More specific examples (a non-exhaustive list) of the computer-readable medium include the following: an electrical connection (electronic) having one or more wires, a portable computer diskette (magnetic), a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or Flash memory), an optical fiber, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium can also be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, for example, via optical scanning of the paper or other medium, then compiled, interpreted, or otherwise processed in a suitable manner, if necessary, and then stored in a computer memory.

[0107] It should be understood that aspects of the present application can be implemented in hardware, software, firmware or combinations thereof. In the above described embodiments, multiple steps or methods can be implemented in software or firmware stored in a memory and executed by a suitable program executing system. For example, if implemented in hardware, and as in another embodiment, any of the following technologies known in the art, or combinations thereof, can be used: discrete logic circuitry having logic gates for implementing logic functions upon data signals, application specific integrated circuits having appropriate combinational logic gates, programmable gate arrays (PGA), field programmable gate arrays (FPGA), and so forth.

[0108] In the above description of the present specification, reference has been made to descriptive terms such as "one embodiment / expression", "another embodiment / expression", or "some embodiments / expressions" and the like, which can mean that a particular feature, structure, material or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. Descriptive terms such as the above do not necessarily refer to the same embodiment or example throughout the present specification. Also, the described particular features, structures, materials or characteristics can be combined in any appropriate manner in one or more embodiments or examples.

[0109] While the embodiments of the application have been shown and described, it is to be understood that the embodiments can be varied, modified, substituted and changed by those skilled in the art without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.

[0110] The above is a specific description of the preferred embodiments of the application, but the application is not limited to the described embodiments, and those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the application, and these equivalent modifications or substitutions are all included in the scope defined by the claims of the application.

Claims

1. A chain elongation detection method for an escalator, characterized by, The method comprises the following steps: detecting a first displacement amount, the first displacement amount being a relative displacement amount of a chain during escalator operation; collecting analog quantities of the first displacement amount in real time to obtain a first displacement amount waveform; performing feature analysis on the first displacement amount waveform to generate a first feature value, the feature analysis comprising effective data filtering and feature calculation; calculating an elongation amount according to the first feature value and a reference value; generating an alarm signal when the elongation amount reaches a preset threshold; The detection of the first displacement amount comprises: obtaining an initial state of the chain, the initial state comprising an operation direction; detecting a second displacement amount according to the initial state, the second displacement amount being a real-time displacement amount of the chain; calculating the first displacement amount according to the second displacement amount and a third displacement amount, the third displacement amount being an initial displacement amount of the chain; The obtaining of the initial state of the chain comprises: obtaining the operation direction according to the reference value; Before the obtaining of the operation direction according to the reference value, the method further comprises obtaining the reference value, specifically comprising: detecting the third displacement amount; collecting analog quantities of the third displacement amount to obtain a second displacement amount waveform; performing feature analysis on the second displacement amount waveform to generate a second feature value; performing weighted calculation on the second feature value to obtain the reference value; In response to adjusting the chain, returning to the step of detecting the third displacement amount.

2. The escalator chain elongation detection method according to claim 1, characterized by, The method further comprises: generating a normal state signal when the elongation amount does not reach the preset threshold, the normal state signal being used to indicate that the chain is in a normal state.

3. The escalator chain elongation detection method according to claim 1, characterized by, The method further comprises: reporting the alarm signal.

4. A chain elongation detection system for an escalator, for implementing a chain elongation detection method for an escalator according to any one of claims 1 to 3, characterized by The method comprises: a first module configured to detect a first displacement amount, the first displacement amount being a relative displacement amount of a chain during escalator operation; a second module configured to collect analog quantities of the first displacement amount in real time to obtain a first displacement amount waveform; a third module configured to perform feature analysis on the first displacement amount waveform to generate a first feature value, the feature analysis comprising effective data filtering and feature calculation; a fourth module configured to calculate an elongation amount according to the first feature value and a reference value; a fifth module configured to generate an alarm signal when the elongation amount reaches a preset threshold.

5. A chain elongation detection device for escalators, characterized in that, The method comprises: at least one processor; at least one memory configured to store at least one program; when the at least one program is executed by the at least one processor, the at least one processor is caused to implement the escalator chain elongation detection method according to any one of claims 1-3.

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