Elevator car door opening restriction device automatic detection method and detection system

Abstract

The application discloses an automatic detection system of an elevator car door opening limiting device, comprising: a cloud end which determines the working state of the car door opening limiting device according to the door area opening width classification and triggers the corresponding maintenance service process; a detection management module which is used for checking the safety conditions before elevator detection, executing the complete detection process, and controlling the man-machine interaction module to output the elevator detection prompt; an elevator control module which is used for receiving the detection management module instruction, driving the car to be separated from the door area at low speed, returning to the original layer at low speed after the detection is completed, monitoring the car overspeed and overdistance abnormality in the running process and reporting to the detection management module; a door system module which is used for driving the car door to be opened by the controlled incremental torque, collecting the car door opening width in real time, monitoring the opening abnormality on the spot and stopping the opening immediately, and reporting the abnormality to the detection management module; and a man-machine interaction module which is used for receiving the detection management module instruction and outputting the elevator detection stop prompt to the elevator landing.

Description

Technical Field

[0001] This invention relates to the field of elevators, and in particular to an automatic detection method and system for elevator car door opening restriction devices. Background Technology

[0002] According to the mandatory provisions of the TSG T7001 elevator safety technical specification, when the car is outside the door zone (unlocking area), the car door opening restriction device must prevent the car door from opening to prevent people from falling into the shaft.

[0003] Existing technologies are all passive safety monitoring solutions, which can only trigger protection when the car door is manually opened outside the door zone. They cannot actively verify whether the car door opening restriction device itself has failed, and have the following technical defects: 1. Existing technology does not have a complete set of devices that can automatically control the car to leave the door zone and apply a controllable torque to the car door without the need for personnel to be present, and quantitatively collect the door opening width to verify the effectiveness of the limiting device. Maintenance personnel need to conduct manual on-site inspections, which results in low inspection efficiency and limited inspection frequency.

[0004] 2. To achieve automatic detection, conventional solutions require the addition of dedicated torque sensors and displacement detection hardware, which is difficult and costly to modify.

[0005] 3. The existing elevator control system does not divide the cloud and elevator-side layered detection function modules, and there is no standardized interface to realize the closed loop of cloud-based detection task distribution, elevator-side independent execution of detection, and result feedback; the detection process cannot be completed when the communication link is interrupted; cloud and elevator data are not layered and isolated, the cloud scheduling strategy and the elevator-side local detection logic are deeply coupled, and the programs on both sides cannot iterate independently.

[0006] 4. Existing technologies lack a layered and modular safety monitoring link for the detection process, and cannot simultaneously cover multiple risks such as personnel entrapment, car overspeed, door opening width exceeding limits, accidental opening of landing doors, and door operator malfunctions; when anomalies occur, each module makes independent decisions, which can easily lead to state conflicts and pose safety hazards.

[0007] 5. Existing technical testing results lack standardized grading and judgment logic, making it impossible to automatically trigger differentiated business processes such as early warning, maintenance dispatch, and emergency repair based on door opening width and anomaly type. Summary of the Invention

[0008] The summary of this invention introduces a series of simplified concepts, all of which are simplifications of existing technologies in the field, and will be further explained in detail in the detailed description section. This summary is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0009] This invention provides an automatic detection method and system for elevator car door opening restriction devices to solve the following technical problems: 1. Existing elevator safety monitoring solutions only passively monitor abnormal door opening in the door zone. They cannot reuse existing elevator hardware to achieve unattended, fully automatic active verification of the effectiveness of the car door opening restriction device. Manual inspection is costly and has poor timeliness. 2. The existing elevator control system lacks a cloud-elevator layered collaborative detection architecture, resulting in deep coupling between cloud and elevator logic. When the network is interrupted, the detection process is interrupted, and the detection scheduling and judgment rules cannot be flexibly adjusted. 3. Without modular and multi-dimensional collaborative security monitoring links, various security risks during the detection process cannot be protected in a layered and localized manner, and multiple module states conflict when abnormally exiting; 4. Lack of standardized testing result grading logic, making it impossible to automatically match the corresponding maintenance and handling process.

[0010] To solve the above-mentioned technical problems, the present invention provides an automatic detection system for elevator car door opening restriction device, comprising: cloud-based control and elevator-side control cabinet; The cloud and communication interface module communicate bidirectionally via the Internet; the communication interface module, detection management module, elevator control module, and door system module interact sequentially via the internal bus of the control cabinet; the detection management module is electrically connected to the human-machine interaction module. The cloud is used to issue detection request tasks, receive detection data uploaded by the elevator side, determine the working status of the car door opening restriction device according to the door zone's outward opening width, and trigger the corresponding maintenance business process. The elevator-side control cabinet integrates a communication interface module, a detection and management module, an elevator control module, a door system module, and a human-machine interaction module. The communication interface module is used for data interaction with the cloud; The detection management module is the elevator-side detection scheduling center, used to verify the pre-detection safety conditions of the elevator, coordinate the elevator control module and door system module to execute the complete detection process, summarize all abnormal information and make unified decisions on safe exit logic, and control the human-machine interaction module to output elevator detection prompts. The elevator control module is used to receive instructions from the detection management module, drive the car to leave the door zone at low speed, and reverse level at low speed after the detection is completed. During operation, it monitors the car's overspeed and overtravel abnormalities on-site and reports them to the detection management module. The door system module is used to drive the car door to open with controlled incremental torque, collect the car door opening width in real time based on the door operator encoder, monitor opening abnormalities on the spot (including width exceeding the limit, opening speed exceeding the limit, and unexpected opening of the landing door), and immediately stop opening the door and report the abnormality to the detection management module. The human-machine interaction module is used to receive instructions from the detection management module and output elevator detection shutdown prompts to the elevator floors.

[0011] The system's testing process meets the TSG T7001 safety standard: the maximum force applied by the door operator when opening the door is less than 1000N, and the protection threshold for the door opening width outside the door zone is not greater than 50mm; the testing process is only initiated when the elevator is in fully automatic operation mode, in closed standby mode, when there are no people remaining in the car, the safety circuit is intact, or when a maintenance authorization or cloud testing request is received.

[0012] Preferably, in a further improved automatic detection system for the elevator car door opening restriction device, the cloud and communication interface module only exchange two types of data: The system receives detection requests from the cloud and uploads detection results from the elevator. The elevator performs a complete local detection process independently. When the network is interrupted, the elevator caches the detection data and automatically re-uploads it to the cloud after communication is restored.

[0013] Preferably, the elevator car door opening restriction device automatic detection system is further improved such that the elevator control module operates out of the door zone as follows: the car is driven at a low speed (e.g., 0.3m / s) to deviate from the current stopping position by a specified distance (e.g., 400mm, which can be specified); if the deviated target falls into the door zone of an adjacent floor, the target position is corrected to outside the door of the adjacent floor.

[0014] Preferably, the automatic detection system for the elevator car door opening restriction device is further improved, wherein the incremental force application logic of the door system module is as follows: the torque is increased to the upper limit of the torque at intervals of a specified time limit (e.g., 100ms) with the initial torque (e.g., 1 / 5 of the rated torque of the door operator as the initial torque), and the upper limit of the torque is less than 1000N; the longest duration of a single door opening force application is the first time limit (e.g., 10s).

[0015] Preferably, the automatic detection system for the elevator car door opening restriction device is further improved, wherein the detection management module is configured with multi-level safety monitoring logic, including detection of people remaining in the car, overspeed protection of the car, over-limit protection of door opening width, over-limit protection of door opening speed, detection of accidental opening of landing door, pre-test of door system, and detection timeout protection; after any module detects an abnormality, it only stops its own operation, and the detection management module coordinates the stopping of door opening, car re-leveling, and restoration of fully automatic elevator operation.

[0016] Preferably, the automatic detection system for the elevator car door opening restriction device is further improved such that the door system module automatically performs a complete door opening and closing self-test after the car returns to the door zone; if a door opening or closing malfunction is detected during the self-test, the door system module reports the abnormality to the detection management module, which then pushes it to the cloud via the communication interface module.

[0017] Preferably, the automatic detection system for the elevator car door opening restriction device is further improved, wherein the cloud-based system has a preset validity threshold for the door opening width outside the door zone, and the validity threshold is less than the door opening width protection threshold outside the door zone and not greater than a first threshold (e.g., 50mm). Based on the comparison between the maximum door opening width and the effectiveness threshold and protection threshold, the cloud platform classifies the handling into four categories: normal archiving, degradation warning, device failure, and serious fault.

[0018] This invention provides an automatic detection method for an elevator car door opening restriction device, implemented based on the automatic detection system for an elevator car door opening restriction device described in any one of the above claims, comprising: S1. The cloud generates detection requests according to a preset cycle or on-demand strategy, and sends them to the elevator-side detection management module through the cloud communication interface module. S2. The detection management module verifies all the pre-detection safety conditions of the elevator locally. After all conditions are met, it sends an instruction to enter the detection mode to the elevator control module and the door system module. S3. After receiving the instruction, the elevator control module controls the car to run at low speed to the designated position outside the door zone and then stop. S4. After receiving the instruction, the door system module applies an increasing torque to the car door and collects the car door opening width in real time. If the opening width exceeds the door opening width protection threshold outside the door zone, the opening action will stop immediately. S5. The detection management module performs safety monitoring on the car, elevator control module, and door system module. When any module of the elevator control module or door system module detects a safety abnormality, it reports to the detection management module, which then schedules the cessation of all detection actions. S6. After the inspection process is completed, the elevator control module drives the car to reverse level to the original stopping door area, and the door system module performs a complete door opening and closing self-test. S7. The detection management module summarizes the maximum door opening width and all abnormal indicators of this detection and uploads them to the cloud through the cloud communication interface module. When the network is interrupted, the detection results are cached locally and automatically re-uploaded after the communication is restored. S8. The cloud-based system compares the validity threshold of the door opening width in the door zone with the protection threshold of the door opening width in the door zone to determine the status of the car door opening restriction device, and performs corresponding record archiving, maintenance warning, maintenance dispatch, and emergency repair escalation.

[0019] Preferably, in the further improved automatic detection method of the elevator car door opening restriction device, in step S4, the initial applied torque of the door system module is 1 / 5 of the rated torque of the door operator, and the torque is increased in steps of 100~200ms, with the upper limit of the torque being less than 1000N, and the upper limit of the single door opening detection time being 10s.

[0020] Preferably, the automatic detection method for the elevator car door opening restriction device is further improved, and the safety monitoring in step S5 includes: the detection management module monitoring the lingering of personnel inside the car; the elevator control module monitoring the car overspeed and overtravel; and the door system module monitoring the door opening width exceeding the limit, the door opening speed exceeding the limit, the unexpected opening of the landing door, and / or the door operator encoder failure.

[0021] The working principle of the present invention is explained below based on the above technical solution; This invention employs a layered, decoupled, and collaborative cloud-based elevator architecture. The cloud is only responsible for task scheduling and result determination, while all detection actions and safety protection logic are completed independently on-site within the elevator. The detection management module acts as a unified scheduling hub, coordinating the elevator control and door system execution modules. The elevator control module enables the car to automatically detach from the door zone, while the door system module reuses existing encoders and servo torque systems to controllably apply force and quantify the door opening width. Multiple modules are monitored locally in a layered manner, with any anomalies coordinated and resolved by the detection management module. The cloud determines the device status based on the door opening width threshold and automatically triggers maintenance procedures. The entire system reuses the elevator's existing door operator, encoder, main control, and communication hardware, eliminating the need for additional dedicated detection hardware.

[0022] Based on the above technical solution and working principle, the present invention can achieve at least the following technical effects compared with the prior art; 1) Existing technologies only passively monitor door opening accidents and have no active verification capability. They can only be detected manually on-site, resulting in low detection frequency and high labor costs.

[0023] This invention achieves quantitative detection of device effectiveness through automatic car movement and controllable force application by the door operator. It can perform routine and periodic self-inspections without the need for maintenance personnel to be present, thus avoiding the shortcomings of manual inspection.

[0024] 2) If existing technologies are to achieve automatic detection, special detection equipment needs to be installed, which results in a long modification cycle and high cost.

[0025] This invention fully reuses the existing elevator door operator encoder, door lock, main control bus, and floor display device (as a human-machine interaction module), without the need for additional torque sensors or dedicated displacement detection hardware, and incurs no additional hardware modification costs.

[0026] 3) The existing cloud elevator control logic is deeply bound, and the detection is interrupted when the network is disconnected. Adjusting the judgment rules requires rewriting the elevator program.

[0027] This invention allows only two types of lightweight data—requests and results—to be exchanged between the cloud and the elevator side. The detection process runs independently locally, and the detection can be fully executed even if the network is interrupted. Data can be retransmitted after communication is restored. The cloud scheduling and judgment logic are separated from the elevator's local detection code, and the cloud strategy can be upgraded independently without modifying the elevator firmware. This results in decoupling of cloud and elevator logic, strong communication fault tolerance, and flexible iteration.

[0028] 4) Existing technology lacks a layered safety monitoring system. When an anomaly occurs, each component shuts down independently, which can easily lead to disordered timing of the car and car door movements, posing a safety risk to the hoistway.

[0029] This invention monitors various safety risks locally in real time through elevator control and door system modules. If an abnormality is detected, the operation is stopped immediately, and the detection management module is notified to coordinate the exit process. This avoids conflicts in the operation of the car and door system caused by multiple modules making independent decisions.

[0030] 5) Existing technologies lack standardized quantitative judgment logic and cannot automatically distinguish between slight deterioration and complete failure of the device, so maintenance and scheduling rely on manual judgment.

[0031] This invention sets a dual-layer width threshold (effectiveness threshold < protection threshold ≤ 50mm) to achieve advanced early warning, failure dispatch, and multi-level handling of serious faults, thereby automating maintenance and repair.

[0032] 6) Existing manual detection methods are difficult to accurately control the applied force, which can easily cause mechanical damage to the limiting device.

[0033] This invention detects a force limit lower than the legally mandated 1000 test force, sets a 50mm upper limit protection for door opening width, and mechanically decouples the car door and landing door in non-door zones. It fully complies with the mandatory elevator safety standard TSG T7001 and has no risk of mechanical damage. Attached Figure Description

[0034] The accompanying drawings are intended to illustrate the general characteristics of the methods, structures, and / or materials used in specific exemplary embodiments of the invention, supplementing the description in the specification. However, the drawings are schematic diagrams not drawn to scale and may not accurately reflect the precise structural or performance characteristics of any of the given embodiments. The drawings should not be construed as limiting or restricting the range of numerical values ​​or properties covered by exemplary embodiments of the invention. The invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0035] Figure 1 This is a diagram of the automatic detection system architecture for the elevator car door opening restriction device of the present invention. Detailed Implementation

[0036] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can fully understand other advantages and technical effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through different specific embodiments, and various details in this specification can also be applied based on different viewpoints, with various modifications or changes made without departing from the overall design concept of the invention. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. The following exemplary embodiments of the present invention can be implemented in many different forms and should not be construed as being limited to the specific embodiments set forth herein. It should be understood that these embodiments are provided to make the disclosure of the present invention thorough and complete, and to fully convey the technical solutions of these exemplary embodiments to those skilled in the art. It should be understood that when an element is referred to as "connected" or "combined" to another element, the element can be directly connected or combined to the other element, or there may be intermediate elements. The difference is that when an element is referred to as "directly connected" or "directly combined" to another element, there are no intermediate elements. Throughout the drawings, the same reference numerals always denote the same elements.

[0037] First embodiment; This invention provides an automatic detection system for elevator car door opening restriction devices, which consists of a cloud platform, an elevator control cabinet, and a car top station.

[0038] Cloud-based: Equipped with cloud-based features, serving as a global task scheduling and result judgment unit, it can issue detection tasks on a daily / monthly cycle, receive the maximum door opening width and abnormal flags uploaded by the elevator, and trigger graded maintenance by comparing them with thresholds. Elevator control cabinet internal modules: Cloud communication interface module (communication interface module): Connects to the cloud via Internet communication and connects to the detection management module via internal bus. It only transmits two types of messages: detection request and detection result, thus achieving decoupling of cloud ladder data. The detection management module is the core dispatch center on the elevator side. Its internal bus connects to the elevator control module and the cloud communication interface module. The hardware is deployed on the elevator main control board. Its functions include: detection precondition verification, mode switching, command issuance, multi-module anomaly summary, result uploading, and human-machine interaction prompt control. Elevator control module: The main control board has a built-in software module that receives car operation commands from the detection and management module and connects to the car top station door system module through hardware lines; Car top station: Built-in door system module, reusing the original door operator servo with torque control, door operator encoder, and limit switch; Human-computer interaction module: It adopts a floor display device, which is driven by the detection management module to output elevator detection shutdown prompts to remind passengers to stop using it; Module data links: Cloud → Cloud communication interface (Internet); Cloud communication interface → Detection management module (internal communication of main control); Detection management module → Elevator control module (internal communication of main control); Elevator control module → Car top and station door system module (dedicated communication link for door operator).

[0039] Execution flow of the detection management module: Pre-condition verification: Elevator fully automatic operation, door closed standby, no personnel in the car (verification of in-car button / camera signals), complete safety circuit, no door system malfunction; Mode Confirmation: Sends an entry command to the detection mode to the elevator control module and the door system module, and switches to the dedicated detection operation mode after receiving the readiness confirmation signal from both modules; Process instruction issuance: Sequentially issue instructions for car leaving the door zone, door operator increasing torque to open the door, reverse leveling, and door operator reset self-test; continuously monitor the real-time status reports of the elevator control and door system modules; Unified handling of anomalies: If any execution module reports an anomaly, a stop command will be issued immediately to coordinate the stopping of the car, closing of the car doors, and exit from the detection mode. Results upload: After the test is completed, the maximum door opening width, all abnormal types, and the reason for test exit are summarized and uploaded to the cloud via the cloud communication interface; Passenger Notice: The human-machine interface module at the control floor station displays an elevator detection notice.

[0040] The elevator control module includes the following controls for car operation and local protection: 1. Car leaving the door zone execution logic: After receiving the leaving the door zone command, calculate the target position = current stopping position + 400mm displacement; if the target position falls into the door zone of the adjacent floor, correct the target position to the stopping point of the adjacent floor + 400mm; drive the car at a low speed of 0.3m / s to stop at the target position; 2. Reverse leveling execution: After the inspection is completed, return to the initial stopping door area at a low speed of 0.3m / s; 3. Local protection logic: Monitor overspeed and overtravel faults throughout operation; determine an anomaly when unable to leave the door zone; immediately stop car operation upon detecting an anomaly, upload the anomaly code to the detection management module, and wait for unified scheduling.

[0041] The door system module's controlled force opening and local protection include the following controls: 1. Increasing torque door opening logic: Upon receiving a special low-speed door opening command, the initial torque F0 is 1 / 5 of the rated torque, and the torque is increased in steps every 100~200ms, with the upper limit of torque less than 1000N; continuously collect encoder and limit switch data to calculate the real-time door opening width W(t); the upper limit of the single door opening detection time is 10s; if the total door opening width does not exceed the 50mm protection threshold, the door will automatically close and the maximum door opening width will be recorded. 2. Multi-layer local protection: Real-time monitoring of door opening width exceeding 50mm, door opening speed exceeding limit, accidental opening of floor doors and / or door operator encoder failure; any protection condition triggered will immediately stop door opening and close the door, and report to the detection management module; 3. Post-detection self-check: After the car returns to the door area, it automatically completes a full door opening and closing cycle. If any abnormality occurs during the door opening or closing, it will report it to the cloud.

[0042] Multi-module security monitoring includes the following controls; 1. Personnel lingering monitoring: The detection management module collects signals from registration, buttons, and cameras inside the car. If personnel are detected, the detection will be refused or terminated immediately. 2. Car operation protection: The elevator control module is only allowed to detect a dedicated low speed of 0.3m / s. If the speed exceeds the limit, the elevator will stop immediately on the spot and report the incident. 3. Door opening width / speed protection: The door system module determines the door opening width and speed in real time, and stops the door immediately if the limit is exceeded; 4. Landing door opening protection: The car door and landing door in non-door zones are mechanically decoupled. If the unlocking and opening of the landing door is detected, the door opening will be terminated. 5. Self-test protection: If a fault is detected in the front door system, the test will be rejected immediately; if the total test time exceeds 2 to 3 times the standard time, it will be considered an abnormal timeout. 6. Fault Exit Logic: The elevator control module and door system module only perform local shutdown and do not automatically restore the elevator; all exit actions are uniformly scheduled by the detection management module to complete the complete process of shutdown → door closing → re-leveling → restoration to fully automatic elevator mode.

[0043] The stratified determination after receiving the detection results in the cloud includes: Normal: Maximum door opening width ≤ validity threshold, archive periodic inspection records, and schedule the next inspection according to the preset cycle; Deterioration warning: When the effectiveness threshold is less than the maximum door opening width and less than the protection threshold, a routine maintenance reminder is triggered; Device failure: Maximum door opening width > protection threshold, immediately generate on-site maintenance work order; Serious hardware anomaly: Door operator or safety circuit malfunction; escalation of the fault and issuance of an emergency repair work order. Process interruption anomaly: differentiate between communication interruption, human intervention, and equipment failure, and reschedule the testing or transfer to emergency repair process; Parameter limitation: The effective threshold for the outward opening width of the door zone is less than the protection threshold for the outward opening width of the door zone, and ≤ 50mm.

[0044] Second embodiment; This invention provides an automatic detection method for elevator car door opening restriction devices, implemented based on the automatic detection system for elevator car door opening restriction devices described in the first embodiment, and includes the following steps: S1. The cloud generates detection requests periodically and sends them to the detection management module through the cloud communication interface; S2. The detection management module verifies all prerequisite safety conditions. After the verification is successful, it sends a detection mode start command to the elevator control module and the door system module. S3. The elevator control module calculates the safe target position and drives the car at a low speed of 0.3m / s to stop outside the door zone; S4, the door system module opens the car door with incremental torque and collects the opening width in real time; if the width exceeds the 50mm protection threshold, the door opening will stop immediately. S5: The detection and management module monitors the people inside the elevator car; the elevator control module monitors the car overspeed; the door system module monitors the door opening width, speed, and landing door status; any abnormality triggers an on-site shutdown and report. S6. After the test is completed, the elevator control module drives the car to reverse level, and the door system module performs a complete door opening and closing self-test. S7, the detection management module summarizes the maximum door opening width and all abnormal indicators, and uploads them to the cloud via the cloud communication interface; when the network is interrupted, the results are cached locally and automatically re-uploaded after the link is restored; S8 uses cloud-based comparison of dual-layer width threshold classification to automatically perform archiving, early warning, maintenance dispatch, and emergency repair escalation.

[0045] Unless otherwise defined, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It will also be understood that, unless explicitly defined herein, terms such as those defined in a general dictionary shall be interpreted as having the meaning consistent with their meaning in the relevant field context, and not as having an idealized or overly formal meaning.

[0046] The present invention has been described in detail above through specific embodiments and examples, but these are not intended to limit the invention. Many modifications and improvements can be made by those skilled in the art without departing from the principles of the invention, and these should also be considered within the scope of protection of the present invention.

Claims

1. An automatic detection system for an elevator car door opening restriction device, characterized in that, include: Cloud-based and elevator-side control cabinet; The cloud is used to issue detection request tasks, receive detection data uploaded from the elevator side, determine the working status of the car door opening restriction device according to the door zone's outward opening width, and trigger the corresponding maintenance business process. The elevator-side control cabinet integrates a communication interface module, a detection and management module, an elevator control module, a door system module, and a human-machine interaction module. The communication interface module is used for data interaction with the cloud. The detection management module is used to verify the pre-detection safety conditions of the elevator, execute the complete detection process, summarize all abnormal information and make unified decisions on the safe exit logic, and control the human-machine interaction module to output elevator detection prompts. The elevator control module is used to receive instructions from the detection management module, drive the car to leave the door zone at low speed, and reverse level at low speed after the detection is completed. During operation, it monitors the car for overspeed and overtravel abnormalities on-site and reports them to the detection management module. The door system module is used to drive the car door to open with controlled incremental torque, collect the car door opening width in real time, monitor door opening abnormalities on-site and immediately stop door opening, and report the abnormality to the detection and management module. The human-computer interaction module is used to receive instructions from the detection management module and output elevator detection shutdown prompts to the elevator floors.

2. The automatic detection system for elevator car door opening restriction device according to claim 1, characterized in that, The cloud and communication interface module only exchange two types of data: The system receives detection requests from the cloud and uploads detection results from the elevator. The elevator performs a complete local detection process independently. When the network is interrupted, the elevator caches the detection data and automatically re-uploads it to the cloud after communication is restored.

3. The automatic detection system for elevator car door opening restriction device according to claim 1, characterized in that, The elevator control module operates out of the door zone by driving the car at a specified speed at a low speed away from the current stopping position by a specified distance; if the offset target falls into the door zone of an adjacent floor, the target position is corrected to outside the door of the adjacent floor.

4. The automatic detection system for elevator car door opening restriction device according to claim 1, characterized in that: The incremental force application logic of the door system module is as follows: the torque is increased to the upper limit of the torque at the initial torque interval specified by time limit, and the upper limit of the torque is less than 1000N; the longest time for a single door opening force application is the first time limit.

5. The automatic detection system for elevator car door opening restriction device according to claim 1, characterized in that: The detection management module is configured with multi-level safety monitoring logic, including detection of people remaining in the car, overspeed protection of the car, over-limit protection of door opening width, over-limit protection of door opening speed, detection of accidental opening of landing doors, pre-test of the door system, and detection timeout protection. If any module detects an abnormality, it will only stop its own operation, and the detection management module will coordinate to stop door opening, reverse leveling of the car, and restore the elevator to fully automatic operation.

6. The automatic detection system for elevator car door opening restriction device according to claim 1, characterized in that: After the car returns to the door zone, the door system module automatically performs a complete door opening and closing self-test. If a door opening or closing malfunction is detected during the self-test, the door system module reports the abnormality to the detection management module, which then pushes it to the cloud via the communication interface module.

7. The automatic detection system for elevator car door opening restriction device according to claim 1, characterized in that: The cloud has a preset validity threshold for the outward opening width of the door zone, which is less than the protection threshold for the outward opening width of the door zone and not greater than the first threshold. Based on the comparison between the maximum door opening width and the effectiveness threshold and protection threshold, the cloud platform classifies the handling into four categories: normal archiving, degradation warning, device failure, and serious fault.

8. An automatic detection method for an elevator car door opening restriction device, implemented based on the automatic detection system for an elevator car door opening restriction device according to any one of claims 1 to 7, characterized in that, include; S1. Generate a detection request in the cloud and send it to the elevator-side detection management module; S2. The detection management module verifies all the pre-detection safety conditions of the elevator locally. After all conditions are met, it sends an instruction to enter the detection mode to the elevator control module and the door system module. S3. After receiving the instruction, the elevator control module controls the car to run at low speed to the designated position outside the door zone and then stop. S4. After receiving the instruction, the door system module applies an increasing torque to the car door and collects the car door opening width in real time. If the opening width exceeds the door opening width protection threshold outside the door zone, the opening action will stop immediately. S5. The detection management module performs safety monitoring on the car, elevator control module, and door system module. If any module of the elevator control module or door system module detects a safety abnormality, the detection management module will schedule and stop all detection actions. S6. After the inspection process is completed, the elevator control module drives the car to reverse level to the original stopping door area, and the door system module performs a complete door opening and closing self-test. S7. The detection management module summarizes the maximum door opening width and all abnormal indicators of this detection and uploads them to the cloud through the cloud communication interface module. When the network is interrupted, the detection results are cached locally and automatically re-uploaded after the communication is restored. S8. The cloud-based system compares the validity threshold of the door opening width in the door zone with the protection threshold of the door opening width in the door zone to determine the status of the car door opening restriction device, and performs corresponding record archiving, maintenance warning, maintenance dispatch, and emergency repair escalation.

9. The automatic detection method for the elevator car door opening restriction device according to claim 8, characterized in that: In step S4, the initial torque applied by the door system module is 1 / 5 of the rated torque of the door operator. The torque is increased in increments of 100~200ms, with the upper limit of the torque being less than 1000N. The upper limit of the single door opening detection time is 10s.

10. The automatic detection method for the elevator car door opening restriction device according to claim 8, characterized in that, Safety monitoring in step S5 includes: the detection management module monitoring for passengers remaining inside the car; the elevator control module monitoring for car overspeed and overtravel; and the door system module monitoring for door opening width exceeding limits, door opening speed exceeding limits, accidental opening of landing doors, and / or door operator encoder malfunctions.

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