Elevator landing door gap warning method, system and equipment based on dynamic threshold value and medium

Abstract

The invention discloses an elevator landing door gap warning method, system and device based on a dynamic threshold value and a medium, and relates to the technical field of data processing. A second comparison gap value is collected, and elevator motion state information corresponding to the second comparison gap value is collected; obtaining a gap difference value corresponding to each second comparison gap value; obtaining an initial preset threshold value, obtaining a correction value corresponding to each second comparison gap value, and obtaining a real-time preset threshold value corresponding to each second comparison gap value according to the initial preset threshold value and each correction value; and the gap difference value is compared with a real-time preset threshold value, whether the gap difference value larger than the real-time preset threshold value exists or not is judged, if yes, an alarm is given, a second comparison gap value corresponding to the gap difference value is output, and the collection time point corresponding to the second comparison gap value and elevator motion state information are obtained. The method has the advantages of accuracy, reliability, dynamic adjustment, safety and stability.

Description

Technical Field

[0001] The present invention relates to the technical field of data processing, and in particular, to an elevator landing door gap warning method, system, device and medium based on a dynamic threshold. Background Art

[0002] With the acceleration of the urbanization process and the continuous emergence of high-rise buildings, elevators, as vertical transportation tools, play a crucial role in people's daily lives. The safe operation of elevators not only concerns the personal safety of passengers but is also an important part of the overall safety management of buildings. Among them, the elevator landing door gap is one of the key indicators of elevator safety performance. The elevator landing door gap refers to the gap between the elevator landing door in the closed state and the elevator car door frame. The size of this gap directly affects the sealing performance, running smoothness of the elevator, and the safety of passengers.

[0003] Traditional monitoring and warning of elevator landing door gaps mostly use a fixed threshold judgment method, that is, a fixed gap value is set as the safety standard. When the monitored gap value exceeds this fixed threshold, the system issues an alarm. However, this fixed threshold method has obvious limitations. First, during the operation of the elevator, due to factors such as the up and down of passengers, the handling of goods, and the mechanical wear of the elevator itself, the landing door gap may change dynamically. The fixed threshold cannot adapt to this dynamic change, which may cause the system to fail to issue an alarm in time when the gap gradually increases but has not exceeded the fixed threshold, thus posing a safety hazard. Second, the motion state of the elevator (such as ascending, descending, stopping, etc.) may also affect the landing door gap; for example, during the ascending or descending process of the elevator, due to the change in speed, the landing door gap increases due to vibration; if the fixed threshold judgment is used, false alarms or missed alarm information may occur, reducing the accuracy and reliability of the system. Finally, traditional gap monitoring and warning often only focus on the absolute value of the gap value and ignore the change trend of the gap value. In actual operation, even if the gap value has not exceeded the fixed threshold, but if its change trend is obvious and continues to increase, it may also indicate potential safety problems with the elevator landing door. Therefore, relying solely on the fixed threshold judgment cannot comprehensively reflect the safety status of the elevator landing door gap. Summary of the Invention

[0004] In view of the defects in the prior art, the present invention provides an elevator landing door gap warning method, system, device and medium based on a dynamic threshold.

[0005] An elevator landing door gap warning method based on a dynamic threshold, comprising: collecting the elevator landing door gap value at time t0 as the first comparison gap value, and obtaining an interval time period; after time t0, collecting the elevator landing door gap value as the second comparison gap value every time an interval time period passes, and simultaneously collecting the elevator motion state information corresponding to the second comparison gap value; obtaining the gap difference corresponding to each second comparison gap value according to the first comparison gap value and each second comparison gap value; obtaining an initial preset threshold, and obtaining the correction value corresponding to each second comparison gap value according to each elevator motion state information, and obtaining the real-time preset threshold corresponding to each second comparison gap value according to the initial preset threshold and each correction value; comparing the gap difference corresponding to the same second comparison gap value with the real-time preset threshold, determining whether there is a gap difference greater than the real-time preset threshold, if so, issuing an alarm and outputting the second comparison gap value corresponding to the gap difference, and obtaining the collection time point and elevator motion state information corresponding to the second comparison gap value.

[0006] Optionally, the method further comprises: if there is no gap difference greater than the real-time preset threshold, arranging multiple gap differences in the collection time order of the second comparison gap values to generate a difference sequence, obtaining a trend index based on the trend model and the difference sequence, and obtaining an alarm strategy according to the trend index.

[0007] Optionally, obtaining a trend index according to the difference sequence includes: obtaining the difference mean value of all gap differences in the difference sequence according to the difference sequence; obtaining a trend index based on the trend model, the difference sequence and the difference mean value.

[0008] Optionally, the trend model in obtaining a trend index based on the trend model, the difference sequence and the difference mean value is expressed as: where D is the trend index, n is the number of gap differences in the difference sequence, Δ i is the i-th gap difference in the difference sequence, and α is the difference mean value.

[0009] Optionally, obtaining an alarm strategy according to the trend index includes: setting an index threshold; determining whether the trend index exceeds the index threshold, and if so, issuing an alarm.

[0010] Optionally, the dynamic adjustment model in obtaining the correction value corresponding to each second comparison gap value according to the dynamic adjustment model and each elevator motion state information is expressed as: where C i is the correction value corresponding to the i-th second comparison gap value, V id is the elevator motion speed at the collection time point of the i-th second comparison gap value, V max is the maximum elevator motion speed, and β is the adjustment coefficient.

[0011] Optionally, obtaining the real-time preset threshold corresponding to each second comparison gap value according to the initial preset threshold and each correction value is expressed as: TH in = C i ·TH is ; where TH in is the real-time preset threshold corresponding to the i-th second comparison gap value, and TH is is the initial preset threshold corresponding to the i-th second comparison gap value.

[0012] There is also provided an elevator landing door gap warning system based on a dynamic threshold. The system includes: an initial acquisition module for acquiring the elevator landing door gap value at time t0 as the first comparison gap value and obtaining the interval time period; a continuous acquisition module for, after time t0, acquiring the elevator landing door gap value as the second comparison gap value every time an interval time period elapses, and simultaneously acquiring the elevator motion state information corresponding to the second comparison gap value; a data processing module for obtaining the gap difference corresponding to each second comparison gap value according to the first comparison gap value and each second comparison gap value; a calculation module for obtaining the initial preset threshold, obtaining the correction value corresponding to each second comparison gap value according to each elevator motion state information, and obtaining the real-time preset threshold corresponding to each second comparison gap value according to the initial preset threshold and each correction value; a first comparison and analysis module for comparing the gap difference corresponding to the same second comparison gap value with the real-time preset threshold, determining whether there is a gap difference greater than the real-time preset threshold, if so, issuing an alarm and outputting the second comparison gap value corresponding to the gap difference, and obtaining the acquisition time point and the elevator motion state information corresponding to the second comparison gap value.

[0013] There is also provided an electronic device, including: a memory storing a computer program thereon; a processor for executing the computer program in the memory to implement the above-mentioned elevator landing door gap warning method based on a dynamic threshold.

[0014] There is also provided a non-transitory computer-readable storage medium storing a computer program thereon, and when the program is executed by a processor, the above-mentioned elevator landing door gap warning method based on a dynamic threshold is implemented.

[0015] The beneficial effects of the present invention are as follows:

[0016] In the entire elevator landing door gap warning method based on dynamic thresholds, by collecting the elevator landing door gap values in real time and comparing them with the dynamically adjusted preset thresholds, the accuracy and reliability of elevator landing door gap monitoring are significantly improved. Specifically, first, an initial comparison gap value is set, and subsequent gap values are continuously collected at set intervals. At the same time, considering the influence of the elevator's motion state information on the gap values, the preset thresholds are dynamically adjusted to adapt to different operating states. Further, by calculating the difference between each collected gap value and the initial comparison gap value and comparing it with the real-time preset threshold, changes in the gap can be detected in a timely manner. Once the gap difference exceeds the real-time preset threshold, the system will immediately issue an alarm and provide detailed gap values, collection time points, and elevator motion state information, providing accurate data support for subsequent fault troubleshooting and maintenance work, thus effectively ensuring the safe operation of the elevator. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to actual scale.

[0018] Figure 1 Schematic diagram of some steps of the elevator landing door gap warning method based on dynamic thresholds of the present invention;

[0019] Figure 2 Schematic diagram of the steps of the elevator landing door gap warning method based on dynamic thresholds of the present invention;

[0020] Figure 3 Schematic diagram of a part of the steps of S6 in the elevator landing door gap warning method based on dynamic thresholds of the present invention;

[0021] Figure 4 Schematic diagram of another part of the steps of S6 in the elevator landing door gap warning method based on dynamic thresholds of the present invention;

[0022] Figure 5 Block diagram of an electronic device shown in an embodiment of the present invention.

[0023] Reference Numerals:

[0024] 700 - Electronic device, 701 - Processor, 702 - Memory, 703 - Multimedia component, 704 - I / O interface, 705 - Communication component. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. The components of the embodiments of the present invention usually described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0027] It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. In addition, the terms "first", "second", etc. are only used for descriptive distinction and cannot be construed as indicating or implying relative importance.

[0028] As Figure 1 shown, a method for warning of elevator landing door gap based on a dynamic threshold is provided, including:

[0029] S1. Collect the elevator landing door gap value at time t0 as the first comparison gap value, and obtain the interval time period;

[0030] S2. After time t0, collect the elevator landing door gap value as the second comparison gap value every time an interval time period passes, and simultaneously collect the elevator movement state information corresponding to the second comparison gap value;

[0031] S3. Obtain the gap difference corresponding to each second comparison gap value according to the first comparison gap value and each second comparison gap value;

[0032] S4. Obtain the initial preset threshold, obtain the correction value corresponding to each second comparison gap value according to each elevator movement state information, and obtain the real-time preset threshold corresponding to each second comparison gap value according to the initial preset threshold and each correction value;

[0033] S5. Compare the gap difference corresponding to the same second comparison gap value with the real-time preset threshold, determine whether there is a gap difference greater than the real-time preset threshold. If so, issue a warning and output the second comparison gap value corresponding to the gap difference, and obtain the collection time point and elevator movement state information corresponding to the second comparison gap value.

[0034] In this embodiment, it should be noted that in S1, the initial acquisition of the elevator landing door gap is carried out first. This step is the basis of the entire elevator landing door gap warning method based on dynamic thresholds. Specifically, when the elevator is in a stationary state or at a specific moment (denoted as time t0), the gap value of the elevator landing door is acquired, and this gap value is used as the first comparison gap value. This first comparison gap value will serve as the benchmark for subsequent gap value comparisons. At the same time, an interval time period also needs to be obtained, and this time period will be used to determine the frequency of subsequent acquisitions of the elevator landing door gap values. For example, it can be set to acquire the gap value of the elevator landing door every 5s. The setting of this interval time period needs to be determined according to the actual usage situation and monitoring requirements of the elevator, ensuring that changes in the gap value can be captured in a timely manner while avoiding excessive system burden caused by overly frequent acquisitions.

[0035] Suppose in an elevator in an office building, it is decided to acquire the gap value of the elevator landing door once at the start of the elevator operation every morning (i.e., at time t0) as the first comparison gap value. At the same time, the interval time period is set to 10s, which means that in the following time, every 10s, the gap value of the elevator landing door will be acquired again. In this way, the change of the elevator landing door gap can be dynamically monitored through the continuously acquired gap values, providing accurate data support for subsequent judgments and warnings.

[0036] In S2, after time t0, the gap values of the elevator landing door are continuously acquired at the pre-set interval time period. These gap values acquired after t0 are called the second comparison gap values. Different from simply acquiring the gap values, the elevator motion state information corresponding to each second comparison gap value is also acquired simultaneously. The elevator motion state information may include whether the elevator is moving upward, downward, stopping, or in other specific states, and these states can be represented by a specific parameter (such as speed). The purpose of acquiring this information is to dynamically adjust the preset threshold according to the actual motion state of the elevator in the subsequent process, thereby improving the accuracy and reliability of the warning. For example, if the gap of the landing door increases due to vibration caused by speed changes during the upward or downward movement of the elevator, the preset threshold can be adjusted accordingly based on this motion state information to avoid false alarms or missed alarms.

[0037] For example, after the elevator starts running every morning (i.e., after time t0), the gap value of the elevator landing door is acquired every 10s as the second comparison gap value. At the same time, the elevator motion speed at the time of each gap value acquisition is recorded. In this way, when comparing the gap difference with the real-time preset threshold in the subsequent process, the preset threshold can be dynamically adjusted according to the actual motion state of the elevator to ensure the accuracy and reliability of the warning.

[0038] In S3, the gap differences between each second comparison gap value and the first comparison gap value are calculated. Specifically, for each collected second comparison gap value, a subtraction operation is performed between it and the first comparison gap value to obtain the corresponding gap difference for this second comparison gap value. This gap difference reflects the change in the elevator landing door gap from time t0 to the current collection time point. By calculating these gap differences, the change in the elevator landing door gap can be dynamically monitored, providing a basis for subsequent judgment of whether the gap is abnormal.

[0039] Taking the elevator in an office building as an example, assume that the first comparison gap value collected at time t0 (when the elevator starts running in the morning) is 5 mm. Then, the second comparison gap value is collected every 10 s. At a certain moment, a second comparison gap value of 7 mm is collected. At this time, the gap difference between this second comparison gap value and the first comparison gap value will be calculated, that is, 7 mm - 5 mm = 2 mm. This gap difference indicates that the elevator landing door gap has increased by 2 mm from time t0 to the current collection time point. Such calculations will be continuously performed to obtain a series of gap differences for subsequent comparison with the real-time preset threshold to determine whether there is an abnormality in the elevator landing door gap.

[0040] In S4, it is the process of obtaining the real-time preset threshold, which is dynamically adjusted based on the initial preset threshold and the correction value corresponding to the elevator motion state information. First, an initial preset threshold is set, which is determined according to the industry safety standard of the elevator landing door gap and serves as the benchmark for judging whether the gap difference is abnormal. Then, during the elevator operation, the elevator motion state information corresponding to each second comparison gap value is collected in real time, such as the specific speed parameter of the elevator. According to the motion state information, the corresponding correction value is obtained, which is used to adjust the initial preset threshold so that the real-time preset threshold can adapt to the current motion state of the elevator. Finally, the initial preset threshold and the correction value are added or subtracted (depending on the sign of the correction value) to obtain the real-time preset threshold corresponding to each second comparison gap value.

[0041] Suppose the initial preset threshold is set to 3 mm, indicating that when the gap difference exceeds 3 mm, it is considered that there is an abnormality in the elevator landing door gap. Then, during the elevator operation, the elevator motion state information is collected in real time. When the elevator is in the upward state, since the speed change may cause the landing door gap to increase due to vibration, a correction value will be obtained according to the specific speed at this time. Then, for the second comparison gap value in the upward state, the real-time preset threshold is obtained by processing the initial preset threshold with the correction value, such as 4 mm. This means that in the upward state of the elevator, only when the gap difference exceeds 4 mm will it be considered that there is an abnormality in the elevator landing door gap and an alarm will be issued. Through such dynamic adjustment, it is possible to more accurately judge whether there is an abnormality in the elevator landing door gap and improve the accuracy and reliability of the alarm.

[0042] In S5, the process of comparing the calculated gap difference with the real-time preset threshold to determine whether there is an abnormality in the elevator landing door gap. Specifically, for each second comparison gap value, the gap difference between it and the first comparison gap value is calculated, and this gap difference is compared with the corresponding real-time preset threshold. If the gap difference is greater than the real-time preset threshold, it is considered that there is an abnormality in the elevator landing door gap. At this time, an alarm signal is immediately sent out, and the second comparison gap value corresponding to this gap difference is output. At the same time, the acquisition time point of this second comparison gap value and the motion state information of the elevator at that time are recorded. These information are very important for subsequent fault troubleshooting and maintenance work.

[0043] Suppose at a certain moment, the gap difference between a calculated second comparison gap value and the first comparison gap value is 4.5 mm, and at this time the elevator is in the upward state, and the corresponding real-time preset threshold is 4 mm (dynamically adjusted according to the steps in S4). Since 4.5 mm is greater than 4 mm, it is determined that there is an abnormality in the elevator landing door gap. Then an alarm signal is immediately sent out, and the second comparison gap value corresponding to this gap difference is output. At the same time, the acquisition time point of this gap value and the motion state information (speed value) of the elevator at that time are recorded. In this way, the maintenance personnel can quickly locate the problem according to these information and carry out maintenance in a timely manner, so as to ensure the safe operation of the elevator and effectively improve the accuracy and reliability of the elevator landing door gap monitoring.

[0044] In summary, in the whole elevator landing door gap alarm method based on dynamic threshold, by collecting the elevator landing door gap value in real time and comparing it with the dynamically adjusted preset threshold, the accuracy and reliability of the elevator landing door gap monitoring are significantly improved; specifically, first, an initial comparison gap value is set, and subsequent gap values are continuously collected at the set interval time period. At the same time, considering the influence of the elevator motion state information on the gap value, the preset threshold is dynamically adjusted to adapt to different operating states; further, by calculating the difference between each collected gap value and the initial comparison gap value and comparing it with the real-time preset threshold, the change of the gap can be detected in time. Once the gap difference exceeds the real-time preset threshold, the system will immediately send out an alarm and provide detailed gap values, acquisition time points and elevator motion state information, providing accurate data support for subsequent fault troubleshooting and maintenance work, thus effectively ensuring the safe operation of the elevator.

[0045] In one embodiment, the method further includes:

[0046] S6. If there is no gap difference greater than the real-time preset threshold, arrange multiple gap differences in the acquisition time order of the second comparison gap value to generate a difference sequence, obtain a trend index based on the trend model and the difference sequence, and obtain an alarm strategy according to the trend index.

[0047] In this embodiment, it should be noted that in S6, when it is found that no gap difference exceeds the real-time preset threshold, it indicates that within the range of the currently acquired gap values, the elevator landing door gap has not reached the condition for directly triggering an alarm. However, this does not mean that the gap change is completely safe, because the gap value may be gradually changing in a potentially dangerous trend. Therefore, in step S6, by generating a difference sequence, multiple gap differences are arranged in the acquisition time order to intuitively reflect the change of the gap value over time. Subsequently, the trend model is used to analyze the difference sequence, which can comprehensively consider factors such as the magnitude, change rate, and stability of the change trend of the gap difference, thereby generating a trend index. This trend index is used to quantify the potential risk of the gap value change and provide a basis for formulating the subsequent alarm strategy.

[0048] For example, assume that within a period of time, the difference sequence of the elevator landing door gap shows a continuous and slow increasing trend. Although each gap difference does not exceed the real-time preset threshold, the trend model may identify this continuous increasing trend and calculate a relatively high trend index. This indicates that although the current gap value has not triggered an alarm, the gap is changing in a trend that may indicate future problems. Based on this trend index, a more refined alarm strategy can be formulated. For example, when the trend index reaches or exceeds a preset index threshold, even if the gap difference does not exceed the real-time preset threshold, a warning signal will be issued to remind the maintenance personnel to pay attention to the change of the elevator landing door gap and take corresponding preventive measures to avoid potential safety hazards. Such a design makes the monitoring of the elevator landing door gap more comprehensive and detailed, effectively improving the safety and reliability of elevator operation.

[0049] In one embodiment, obtaining the trend index according to the difference sequence in S6 includes:

[0050] S61. Obtain the difference mean value of all gap differences in the difference sequence according to the difference sequence;

[0051] S62. Obtain the trend index based on the trend model, the difference sequence, and the difference mean value.

[0052] In this embodiment, it should be noted that in S61, the difference sequence is a collection of multiple gap differences within a period of time and arranged in the order of acquisition time. The gap difference is obtained by comparing each second comparison gap value with the first comparison gap value, reflecting the change of the elevator landing door gap over time. Then, in S61, mathematical processing is performed on these gap differences to calculate their mean value, that is, the difference mean value. This difference mean value represents the average level of the change of the elevator landing door gap during this period of time and is the basis for subsequent trend analysis. For example, if the gap values are collected every 10 seconds within one hour and the corresponding gap differences are calculated, then these differences form a difference sequence. S61 will sum all the differences in this sequence and then divide by the total number of differences to obtain the difference mean value; this mean value can help us understand the overall change trend of the elevator landing door gap during this period of time and provide an important reference for the calculation of the subsequent trend index.

[0053] In S62, the trend model comprehensively considers each gap difference in the difference sequence and its relationship with the difference mean value to evaluate the potential risk of the change of the elevator landing door gap. Specifically, if the gap differences in the difference sequence are generally greater than the difference mean value and show a continuous increasing trend, then the trend model will calculate a relatively high trend index, indicating that the elevator landing door gap is changing in a potentially unsafe way. For example, assume that the gap differences in the difference sequence are greater than the difference mean value several times in a row and are larger than the previous time each time. Then the trend model will identify this continuous increasing trend and calculate a relatively high trend index accordingly. This index can be used to judge whether there are potential safety problems with the elevator landing door gap and provide a scientific basis for the formulation of subsequent warning strategies. If the trend index exceeds the preset threshold, an alarm will be issued to remind the maintenance personnel to pay attention to and handle the change of the elevator landing door gap in a timely manner.

[0054] In one embodiment, the trend model in obtaining the trend index based on the trend model, the difference sequence and the difference mean value in S62 is expressed as:

[0055] Wherein,

[0056] D is the trend index, n is the number of gap differences in the difference sequence, Δ i is the i-th gap difference in the difference sequence, and α is the difference mean value.

[0057] In this embodiment, it should be noted that This part calculates the sum of the change amounts of adjacent gap differences in the difference sequence; where Δ i -Δ i-1It represents the difference between the i-th gap difference and the (i - 1)-th gap difference. If this difference is positive, it indicates that the gap is increasing; if it is negative, it indicates that the gap is decreasing. By summing up, the overall trend of the gap change in the entire difference sequence can be obtained. This part calculates the sum of the positive values of the change in adjacent gap differences, max(0, Δ i -Δ i-1 ) means only considering the case where the gap is increasing and ignoring the case where the gap is decreasing. On the one hand, it is because only the total amount of the increasing gap needs to be calculated in the denominator, which is combined with the numerator part to judge the trend of the increasing gap. On the other hand, it also shows more concern about the trend of the increasing gap because only it may indicate potential safety problems. This part calculates the standard deviation of the difference sequence (appropriately adjusted to consider the sample size); among them calculates the sum of the squares of the differences between each gap difference and the mean of the differences; and is used to measure the degree of dispersion of the difference sequence. The larger the value, the more chaotic the change of the gap difference, and then D is smaller.

[0058] For example, assume that we have a set of elevator landing door gap difference sequences: Δ = [1, 1.3, 1.5, 1.7, 1.9], then α = 1.48. The numerator part of the expression In the numerator part of the expression 0.9. In the numerator part of the expression

[0059] Finally, substitute it into the expression,

[0060] In one embodiment, obtaining the warning strategy according to the trend index in S6 includes:

[0061] S63. Set the index threshold;

[0062] S64. Judge whether the trend index exceeds the index threshold. If it exceeds, issue a warning.

[0063] In this embodiment, it should be noted that in S63, a specific value needs to be set for the trend indicator as the indicator threshold, which is used to determine whether the change trend of the elevator landing door gap has reached or exceeded the level that may indicate a safety problem. The setting of the indicator threshold needs to be considered based on the actual operation history data of the elevator, industry safety standards, and the selection of the trend model. For example, according to the trend model and actual operation history data in S62, it is decided to set the indicator threshold to 0.5. This means that when the calculated result of the trend indicator D reaches or exceeds 0.5, it will be considered that there may be a problem with the change trend of the elevator landing door gap. Therefore, in the example of S62, D = 0.72, which significantly exceeds the indicator threshold, indicating that there is a very high probability of a safety risk in the entire elevator landing door gap and further attention is required.

[0064] In S64, based on the indicator threshold set in step S63, the calculated trend indicator D will be judged. Specifically, the trend indicator D will be compared with the indicator threshold of 0.5. If D is greater than or equal to 0.5, it will be considered that the change trend of the elevator landing door gap has reached the level that may indicate a safety problem. At this time, an alarm signal will be immediately issued. The alarm signal can be presented to the maintenance personnel in various ways such as audible and visual alarms, text message notifications, and logs to ensure that they can receive and respond in a timely manner. At the same time, the specific time when the alarm is issued, the motion state information of the elevator, and the relevant gap difference data will be recorded for the maintenance personnel to conduct fault troubleshooting and repair processing later. Through such a design, potential safety problems with the elevator landing door gap can be discovered and reported in a timely manner, effectively improving the safety and reliability of elevator operation.

[0065] In one embodiment, the dynamic adjustment model in S4 for obtaining the correction value corresponding to each second comparison gap value according to the dynamic adjustment model and each elevator motion state information is expressed as:

[0066] Wherein,

[0067] C i is the correction value corresponding to the i-th second comparison gap value, V id is the elevator motion speed at the acquisition time point of the i-th second comparison gap value, V max is the maximum elevator motion speed, and β is the adjustment coefficient.

[0068] In this embodiment, it should be noted that the "1" in the expression is used as the reference correction value, indicating that when the elevator is stationary or the speed is very low, the correction value basically remains unchanged, that is, the preset threshold is not significantly adjusted; this is because when the elevator is stationary or running at a low speed, the landing door gap is less affected by the speed and there is no need to significantly adjust the threshold. represents the current speed V id and the maximum elevator speed Vmax The ratio; this ratio reflects the activity level of the current motion state of the elevator relative to its maximum motion state; when the elevator speed approaches the maximum speed, the ratio approaches 1, indicating that the elevator is in a high-speed operation state. At this time, the landing door gap may increase due to vibration, so the preset threshold needs to be adjusted accordingly. As an adjustment coefficient, β controls the influence degree of the speed ratio on the correction value. Generally, it is 1. Under special requirements, by adjusting the value of β, the sensitivity of the correction value can be flexibly controlled; for example, when β is larger, the correction value is more sensitive to speed changes and is applicable to scenarios where the elevator operation state changes greatly; when β is smaller, the correction value is relatively insensitive to speed changes and is applicable to scenarios where the elevator operation state is relatively stable.

[0069] For example, in an ordinary civil environment, β = 2; assume i = 3, V max = 2m / s, V 3d = 1.5m / s. Substituting into the expression After calculation, it is equal to 0.75, then C3 = 1 + (0.75) 2 = 1.5625.

[0070] In one embodiment, in S4, obtaining the real-time preset threshold corresponding to each second comparison gap value according to the initial preset threshold and each correction value is expressed as:

[0071] TH in = C i ·TH is ; where

[0072] TH in is the real-time preset threshold corresponding to the i-th second comparison gap value, and TH is is the initial preset threshold corresponding to the i-th second comparison gap value.

[0073] In this embodiment, it should be noted that TH is This is a reference value set based on the industry safety standard of the elevator landing door gap. It is used as a static reference for judging whether the gap difference is abnormal. However, in actual operation, due to the influence of the elevator motion state, this reference needs to be dynamically adjusted. C i The correction value is calculated through a dynamic adjustment model according to the current motion state of the elevator (such as speed); the dynamic adjustment model considers the ratio of the elevator speed to the maximum speed and the adjustment coefficient β to reflect the influence of the elevator motion state on the landing door gap; the introduction of the correction value enables the preset threshold to adapt to different motion states of the elevator, thereby improving the accuracy and reliability of the alarm. TH in By comparing the initial preset threshold TH is with the correction value C iIt is obtained by multiplication. This operation method enables the real-time preset threshold to be dynamically adjusted according to the real-time motion state of the elevator, so as to more accurately reflect the safety status of the elevator car door gap.

[0074] Continuing with the example of the above embodiment, i = 3, C3 = 1.5625. Assume TH is = 2.5, then TH in = 2.5 * 1.5625 = 3.9. In this example, due to the influence of the elevator speed, the real-time preset threshold is adjusted from the initial 2.5 mm to 3.9 mm. This means that when the elevator is running at a speed of 1.5 m / s, only when the gap difference exceeds 3.9 mm will the system consider that there is an abnormality in the elevator car door gap and issue an alarm. Such dynamic adjustment enables the system to more accurately judge the safety status of the elevator car door gap, effectively improving the accuracy and reliability of the alarm.

[0075] It also provides an elevator car door gap alarm system based on a dynamic threshold. The system includes:

[0076] An initial acquisition module, configured to acquire the elevator car door gap value at time t0 as the first comparison gap value, and obtain the interval time period;

[0077] A continuous acquisition module, configured to, after time t0, acquire the elevator car door gap value as the second comparison gap value every time an interval time period passes, and simultaneously acquire the elevator motion state information corresponding to the second comparison gap value;

[0078] A data processing module, configured to obtain the gap difference corresponding to each second comparison gap value according to the first comparison gap value and each second comparison gap value;

[0079] A calculation module, configured to obtain the initial preset threshold, obtain the correction value corresponding to each second comparison gap value according to each elevator motion state information, and obtain the real-time preset threshold corresponding to each second comparison gap value according to the initial preset threshold and each correction value;

[0080] A first comparison and analysis module, configured to compare the gap difference corresponding to the same second comparison gap value with the real-time preset threshold, judge whether there is a gap difference greater than the real-time preset threshold. If so, issue an alarm and output the second comparison gap value corresponding to the gap difference, and obtain the acquisition time point and elevator motion state information corresponding to the second comparison gap value.

[0081] The system further includes: a second comparison and analysis module, configured to, when there is no gap difference greater than the real-time preset threshold, arrange multiple gap differences in the acquisition time order of the second comparison gap values to generate a difference sequence, obtain a trend index based on the trend model and the difference sequence, and obtain an alarm strategy according to the trend index.

[0082] The second comparison and analysis module is further configured to: obtain the difference mean value of all the gap differences in the difference sequence according to the difference sequence; obtain a trend index based on the trend model, the difference sequence, and the difference mean value.

[0083] The second comparison and analysis module is further configured to: set an index threshold; determine whether the trend index exceeds the index threshold, and if it exceeds, issue an alarm.

[0084] In this embodiment, it should be noted that for the above elevator landing door gap warning system based on a dynamic threshold, the specific manner of performing operations has been described in detail in the embodiment of the elevator landing door gap warning method based on a dynamic threshold, and will not be elaborated here.

[0085] Figure 5 It is a block diagram of an electronic device for an elevator landing door gap warning method based on an exemplary embodiment. As Figure 5 shown, the electronic device 700 may include: a processor 701, a memory 702. The electronic device 700 may further include one or more of a multimedia component 703, an I / O interface 704 (input / output interface), and a communication component 705.

[0086] Among them, the processor 701 is used to control the overall operation of the electronic device 700 to complete all or part of the steps in the above elevator landing door gap warning method based on dynamic thresholds. The memory 702 is used to store various types of data to support the operation of the electronic device 700. Such data may include, for example, instructions for any application or method operating on the electronic device 700, as well as application-related data, such as contact data, messages sent and received, pictures, audio, video, and so on. The memory 702 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as Static Random Access Memory (SRAM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Erasable Programmable Read-Only Memory (EPROM), Programmable Read-Only Memory (PROM), Read-Only Memory (ROM), magnetic memory, flash memory, a magnetic disk, or an optical disc. The multimedia component 703 may include a screen and an audio component. Among them, the screen can be, for example, a touch screen, and the audio component is used to output and / or input audio signals. For example, the audio component may include a microphone for receiving external audio signals. The received audio signal can be further stored in the memory 702 or sent through the communication component 705. The audio component also includes at least one speaker for outputting audio signals. The I / O interface 704 provides an interface between the processor 701 and other interface modules, and the above other interface modules can be a keyboard, a mouse, buttons, etc. These buttons can be virtual buttons or physical buttons. The communication component 705 is used for wired or wireless communication between the electronic device 700 and other devices. Wireless communication, such as Wi-Fi, Bluetooth, Near Field Communication (NFC), 2G, 3G, 4G, NB-IOT, eMTC, or other 5G, etc., or a combination of one or more of them, is not limited here. Therefore, the corresponding communication component 705 may include: a Wi-Fi module, a Bluetooth module, an NFC module, and so on.

[0087] In an exemplary embodiment, the electronic device 700 can be implemented by one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors or other electronic components, and is used to execute the above elevator landing door gap warning method based on dynamic thresholds.

[0088] In another exemplary embodiment, a computer-readable storage medium including program instructions is further provided. When the program instructions are executed by a processor, the steps of the above elevator landing door gap warning method based on dynamic thresholds are implemented. For example, the computer-readable storage medium can be the above memory 702 including program instructions, and the above program instructions can be executed by the processor 701 of the electronic device 700 to complete the above elevator landing door gap warning method based on dynamic thresholds.

[0089] In another exemplary embodiment, a computer program product is further provided. The computer program product includes a computer program that can be executed by a programmable device, and the computer program has a code portion for executing the above elevator landing door gap warning method based on dynamic thresholds when executed by the programmable device.

[0090] The preferred embodiments of the present disclosure have been described in detail above in conjunction with the accompanying drawings. However, the present disclosure is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0091] In addition, it should be noted that, in the above specific embodiments, the various specific technical features described can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the present disclosure does not separately describe various possible combination manners.

[0092] Furthermore, any combination can be made between various different embodiments of the present disclosure as long as it does not violate the idea of the present disclosure, and it should also be regarded as the content disclosed by the present disclosure.

[0093] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the various embodiments of the present invention, and they should all be covered by the scope of the claims and the description of the present invention.

Claims

1. An elevator landing door gap warning method based on a dynamic threshold, characterized in that Including: Collect the elevator landing door clearance value at time t0 as the first comparison clearance value, and obtain the interval time period; After time t0, collect the elevator landing door clearance value as the second comparison clearance value every time an interval time period passes, and simultaneously collect the elevator movement state information corresponding to the second comparison clearance value; Obtain the clearance difference corresponding to each second comparison clearance value according to the first comparison clearance value and each second comparison clearance value; Obtain the initial preset threshold, obtain the correction value corresponding to each second comparison clearance value according to each elevator movement state information, and obtain the real-time preset threshold corresponding to each second comparison clearance value according to the initial preset threshold and each correction value; Compare the clearance difference corresponding to the same second comparison clearance value with the real-time preset threshold, determine whether there is a clearance difference greater than the real-time preset threshold. If so, issue an alarm and output the second comparison clearance value corresponding to the clearance difference, and obtain the acquisition time point and elevator movement state information corresponding to the second comparison clearance value.

2. The method for warning of elevator landing door gap based on dynamic threshold according to claim 1, characterized in that, Also including: If there is no clearance difference greater than the real-time preset threshold, arrange multiple clearance differences in the acquisition time order of the second comparison clearance value to generate a difference sequence, obtain a trend index based on the trend model and the difference sequence, and obtain an alarm strategy according to the trend index.

3. The method for warning of elevator landing door gap based on dynamic threshold according to claim 2, wherein The obtaining the trend index according to the difference sequence includes: Obtain the difference mean value of all clearance differences in the difference sequence according to the difference sequence; Obtain a trend index based on the trend model, the difference sequence, and the difference mean value.

4. The method for warning of elevator landing door clearance based on a dynamic threshold according to claim 3, characterized in that, The trend model in the obtaining the trend index based on the trend model, the difference sequence, and the difference mean value is expressed as: Among them, D is a trend indicator, n is the number of gap differences in the difference sequence, Δ i is the i-th gap difference in the difference sequence, and α is the mean of the differences.

5. The method for warning of elevator landing door gap based on dynamic threshold according to claim 4, characterized in that, The obtaining the alarm strategy according to the trend index includes: Set an index threshold; Judge whether the trend index exceeds the index threshold. If it exceeds, issue an alarm.

6. The method for warning of elevator landing door clearance based on a dynamic threshold according to claim 1, characterized in that, The dynamic adjustment model in the obtaining the correction value corresponding to each second comparison clearance value according to the dynamic adjustment model and each elevator movement state information is expressed as: Among them, C i is the correction value corresponding to the i-th second comparison gap value, V id is the elevator movement speed at the acquisition time point of the i-th second comparison gap value, V max is the maximum elevator movement speed, and β is the adjustment coefficient.

7. The method for warning of elevator landing door gap based on dynamic threshold according to claim 6, wherein The obtaining the real-time preset threshold corresponding to each second comparison clearance value according to the initial preset threshold and each correction value is expressed as: TH in = C i ·TH is ; wherein, TH in is the real-time preset threshold value corresponding to the i-th second comparison gap value, TH is is the initial preset threshold value corresponding to the i-th second comparison gap value.

8. An elevator landing door gap warning system based on a dynamic threshold, characterized in that, The system includes: An initial acquisition module for collecting the elevator landing door clearance value at time t0 as the first comparison clearance value and obtaining the interval time period; A continuous acquisition module for collecting the elevator landing door clearance value as the second comparison clearance value every time an interval time period passes after time t0, and simultaneously collecting the elevator movement state information corresponding to the second comparison clearance value; A data processing module for obtaining the clearance difference corresponding to each second comparison clearance value according to the first comparison clearance value and each second comparison clearance value; A calculation module for obtaining the initial preset threshold, obtaining the correction value corresponding to each second comparison clearance value according to each elevator movement state information, and obtaining the real-time preset threshold corresponding to each second comparison clearance value according to the initial preset threshold and each correction value; The first comparison and analysis module is used to compare the gap difference corresponding to the same second comparison gap value with the real-time preset threshold, determine whether there is a gap difference greater than the real-time preset threshold, if so, issue an alarm and output the second comparison gap value corresponding to the gap difference, and obtain the acquisition time point and elevator movement state information corresponding to the second comparison gap value.

9. An electronic device, characterized in that, It includes: A memory on which a computer program is stored; A processor for executing the computer program in the memory to implement the elevator landing door gap warning method based on a dynamic threshold according to any one of claims 1 to 7.

10. A non-transitory computer-readable storage medium storing a computer program thereon, characterized in that, When the program is executed by the processor, it implements the elevator landing door gap warning method based on a dynamic threshold according to any one of claims 1 to 7.

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