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

Abstract

The application discloses an elevator car door opening limiting device automatic detection method, comprising the following steps: S1, a cloud end sends a detection request to an elevator, and the elevator locally checks preconditions of the detection; if the preconditions are met, the elevator switches to a special detection operation mode; S2, the car is controlled to run at a low speed for a preset displacement, so that the car is separated from a door area; if the car cannot be separated from the door area after multiple times of running, it is determined that an abnormality occurs and the detection is exited; S3, a door machine is controlled to actively apply an opening force with an incremental torque, and the opening width of a car door is collected in real time; if the opening width reaches a preset protection threshold, the opening is immediately stopped and an abnormality is recorded, and the maximum opening width of this time is recorded after a preset detection duration; and S4, the cloud end determines the state of the car door opening limiting device, and corresponding disposal processes are performed according to the determination result. The application can solve the technical problems that the prior art can only be passively monitored, cannot automatically check the opening limiting device, and manual detection is inefficient and difficult to trace, and can avoid safety hazards in the detection process through multiple safety protection mechanisms.

Description

Technical Field

[0001] This invention relates to the field of elevators, and in particular to an automated 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 standard, when the car is outside the unlocking area (door zone), the car door opening restriction device must meet the following requirements: when an external force of no more than 1000N is applied to open the car door, the maximum opening width of the car door shall not exceed 50mm, so as to prevent people from falling into the shaft.

[0003] Existing technologies are all passive safety monitoring solutions, which have the following four major technical drawbacks: 1. Existing technology can only trigger the elevator stop protection when the car door is manually opened outside the door zone, and cannot actively verify whether the car door opening restriction device itself has failed.

[0004] 2. Inspection relies on manual labor and lacks automation: The existing solution lacks proactive self-inspection logic, and verifying the effectiveness of the limiting device can only rely on on-site manual operation by maintenance personnel: manually stopping the car outside the door zone, manually applying force to open the door, and visually judging the opening width. This method results in low inspection frequency, inability to quantify and store inspection data, and delayed detection of device failures, posing safety hazards.

[0005] 3. Lack of dedicated safety protection logic for automatic detection scenarios: If the combination of "car leaving the door zone + active controlled door opening" is executed automatically, there are secondary safety risks such as people being trapped, accidental opening of landing doors, and excessively wide opening of car doors. Existing technologies do not have a full-process multi-level safety monitoring, rapid exit from anomalies, or fault classification and handling mechanism for active detection scenarios, and cannot guarantee the safety of elevator operation throughout the entire process of automated detection.

[0006] 4. The existing elevator operation protection logic cannot cover the special scenario of automatically detecting the limiting device when opening the door outside the door zone, so special protection logic needs to be added.

[0007] To address the aforementioned shortcomings, existing technologies have provided the following solutions, but these solutions still do not resolve the aforementioned technical deficiencies. 1. Chinese patents CN102530671B and CN110077943A: passively monitor abnormal events such as the car door outside the door zone being manually opened, and trigger post-event safety linkage protection. 2. Chinese Patent CN100546896C: Relying solely on floor station signals to identify abnormal opening of landing doors is also a form of reactive monitoring.

[0008] The aforementioned existing technologies only provide passive protection after the failure of the car door opening restriction device, and cannot verify in advance whether the function of the car door opening restriction device itself is effective. Summary of the Invention

[0009] 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.

[0010] This invention provides an automated detection method and system for elevator car door opening restriction devices to solve the following technical problems: 1. This addresses the issue that existing technologies can only passively monitor abnormal door opening in the door zone and cannot automatically and actively verify the effectiveness of the car door opening restriction device.

[0011] 2. To solve the technical problems of low efficiency, lack of data traceability, and delayed exposure of potential failures in existing manual inspection technologies.

[0012] 3. To address the safety risks posed by the car leaving the door zone and actively opening the door during automated detection, the lack of supporting multiple safety constraints, incomplete elevator protection logic coverage, and the failure to cover the special scenario of automatically detecting and limiting the newly added door leaving the door zone.

[0013] To address the aforementioned technical problems, this invention provides an automated detection method for elevator car door opening restriction devices, which is executed collaboratively by a cloud-based scheduling platform and the elevator's local control system. The method comprises four core technical modules: cloud-based scheduling logic, local detection execution process, full-process parallel safety monitoring, and closed-loop processing of post-detection results. Simultaneously, it provides an automated elevator detection and control system for executing this method.

[0014] The automated detection method for elevator car door opening restriction device provided by the present invention includes the following steps: S1, the cloud sends a detection request to the elevator, the elevator verifies the detection prerequisites locally, and switches to the dedicated detection operation mode after the prerequisites are met; the prerequisites include the elevator being in fully automatic operation mode, door-closed standby state, and door-free system related faults. S2 controls the car to run at a low speed to a preset displacement, so that the car can stably (uniformly) leave the door area; if it fails to leave the door area after multiple runs, it is judged as abnormal and the detection is terminated. S3 controls the door operator to actively apply the opening force with incremental torque and collects the car door opening width in real time; if the opening width reaches the preset protection threshold, the door opening is stopped immediately and the abnormality is recorded; after the preset detection time is reached, the maximum opening width is recorded. S4, the cloud determines the status of the car door opening restriction device based on the maximum opening width and the preset validity threshold, and executes the corresponding processing procedure based on the determination result.

[0015] Preferably, the automated detection method for the elevator car door opening restriction device is further improved in that steps S2 and S3 are performed in parallel with multiple safety monitoring, and the door opening is immediately terminated and the detection is exited when any safety monitoring is triggered.

[0016] Preferably, the automated detection method for the elevator car door opening restriction device is further improved as follows: after the detection is completed or the abnormal exit occurs, the car is controlled to return to the original stopping and leveling position at a low speed; a normal door opening and closing action is performed to re-inspect the door system; the dedicated detection operation mode is exited and the elevator resumes fully automatic operation; and the detection data, including the maximum door opening width and the type of abnormality, is uploaded to the cloud.

[0017] Preferably, the automated detection method for the elevator car door opening restriction device is further improved, and step S1 further includes: configuring periodic scheduling rules for unattended periods in the cloud and issuing detection tasks; after the elevator receives the detection request, it performs a local secondary verification of the safety circuit, landing door lock, and no internal or external call registration status.

[0018] Preferably, the automated detection method for the elevator car door opening restriction device is further improved, wherein the multiple safety monitoring includes: monitoring of personnel inside the car; The method for identifying and monitoring people inside the car is as follows: monitoring the action signal of the registration button inside the car, the trigger signal of the door opening and closing button, and the person identification signal of the camera inside the car. If any signal is valid, it is determined that there is someone inside the car, and the detection is immediately terminated.

[0019] Preferably, in a further improved automated detection method for the elevator car door opening restriction device, the multiple safety monitoring further includes at least one of the following: (1) Door opening width monitoring: The door operator encoder works in conjunction with the door travel switch to synchronously verify the door opening width. If the width exceeds the protection threshold or the two values ​​do not match, the door opening will stop immediately. (2) Door opening speed monitoring: Real-time acquisition of car door opening speed; if the speed exceeds the preset threshold, the door opening will stop immediately. (3) Floor door lock monitoring: If the floor door lock signal is disconnected during the detection process, the door opening will be terminated immediately; (4) Timeout monitoring: If the total detection time exceeds the preset limit, the detection will automatically exit; (5) Operation mode preemption monitoring: When the elevator receives high-priority operation instructions such as independent operation or fire protection operation, it immediately exits the monitoring.

[0020] Preferably, in a further improved automated detection method for the elevator car door opening restriction device, the cloud-based processing flow includes: 1) Maximum door opening width ≤ validity threshold: The device is deemed normal, the test record is archived, and the next test is scheduled by the cloud on a periodic basis; where validity threshold < protection threshold ≤ 50mm; 2) Maximum door opening width > validity threshold: Determine device failure and generate manual review maintenance work order; 3) Due to passengers in the car or high-priority mode preemption and exit: the cloud will reissue the detection task at a preset interval; 4) Exit due to fault: Rescheduling is allowed. If multiple consecutive tests fail, an emergency repair work order will be issued directly.

[0021] Preferably, in the further improved automated detection method of the elevator car door opening restriction device, the door operator torque control and width threshold setting method in step S3 is as follows: the door operator initially adopts the rated torque fraction to start and uniformly increase the torque, and the maximum torque limit is less than 1000N.

[0022] Preferably, the automated detection method for the elevator car door opening restriction device is further improved. After the door system re-inspection is performed, if the door system fails M times in a series of N consecutive door opening and closing operations after the inspection, a special maintenance work order for the door system is generated in the cloud, where N≥2 and M≥1.

[0023] This invention provides an automated detection and control system for elevator car door opening restriction devices, used to execute any of the above-described automated detection methods for elevator car door opening restriction devices, including a cloud scheduling platform, an elevator local control unit, a door operator drive module, a door width acquisition module, a car passenger detection module, and a safety signal acquisition module; The cloud-based scheduling platform communicates bidirectionally with the elevator's local control unit to issue detection tasks, receive detection data, determine device status, and generate maintenance work orders. The elevator local control unit is electrically connected to the door operator drive module, door width acquisition module, car occupant detection module, and safety signal acquisition module, respectively. The elevator local control unit has built-in dedicated detection operation mode switching logic, car door detachment zone control logic, and detection reset control logic. The door operator drive module is used to receive instructions from the elevator local control unit and output an increasing controlled torque to drive the car door to open. The door width acquisition module includes a door operator encoder and a door limit switch, which are used to acquire the car door opening width in real time and transmit it back to the elevator local control unit. The in-car occupant detection module includes in-car operation buttons and an in-car camera, used to output in-car occupant identification signals; The safety signal acquisition module is used to acquire floor door lock signals, door opening speed signals, elevator operation mode signals, and detection timing signals.

[0024] The working principle of the present invention is explained below based on the above technical solution; The cloud platform issues testing tasks as needed. The elevator first verifies its unmanned and fault-free standby state locally before switching to a dedicated testing mode. After the car moves at low speed away from the door zone, the door operator actively attempts to open the car door with controlled, incremental torque, and the encoder quantifies the door opening width in real time. The entire testing process involves simultaneous and parallel multi-level safety monitoring of personnel, door width, landing door locks, door opening speed, and operating priority. After testing, the car automatically levels and resets, and the door system is re-inspected. Testing data is transmitted back to the cloud, which automatically determines whether the limiting device has failed based on a preset width threshold, generating maintenance work orders as needed to form a digital closed-loop management system. By actively applying controllable external forces to quantify the door opening width, the compliance capability of the limiting device to resist external force opening is directly verified, while the entire process of safety constraints avoids secondary risks associated with automated testing.

[0025] 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 (such as CN100546896C, CN102530671B, CN110077943A) only provide post-event protection for abnormal door opening outside the door zone. They do not have an active torque application or door zone self-test process, and do not have the logic to actively verify the performance of the device itself. They can only passively respond to faults and cannot verify the effectiveness of the device in advance.

[0026] This invention eliminates the need for on-site maintenance personnel, enabling remote scheduling of periodic automatic inspections via the cloud, with flexible increases in inspection frequency. The encoder quantifies and stores door opening width data, and inspection records are archived in the cloud for traceability. Device failures can be warned in advance, avoiding long-term missed inspections and achieving automated and proactive self-inspection of the limiting device, thus eliminating the shortcomings of manual inspection.

[0027] (2) Existing technologies are mainly used for safety protection in normal elevator operation scenarios. They do not have a dedicated multi-monitoring and abnormal exit logic designed for the special working conditions of "active door opening zone + forced door opening". Existing automatic detection schemes for limiting devices have safety hazards.

[0028] This invention simultaneously monitors the number of people inside the elevator car, the door opening width, the door opening speed, the landing door lock, and the elevator's high-priority operating mode throughout the entire detection process. If any risk is triggered, the detection is immediately terminated and the elevator is reset. After the detection is completed, the doors are forcibly opened and closed for re-inspection to confirm that the door system is undamaged. It balances the detection function with the daily operation safety of the elevator, and implements multiple parallel safety protections throughout the entire process to prevent secondary safety accidents caused by automated detection and eliminate safety hazards.

[0029] (3) Existing technologies lack cloud-based elevator local linkage detection and scheduling, automatic result judgment and maintenance work order generation links. Manual detection data lacks unified digital storage and cannot automatically trigger maintenance processes.

[0030] This invention enables cloud-based automatic differentiation of various detection results, including normal operation, device failure, personnel interference, and equipment malfunction. It then performs categorized archiving, work order dispatching, rescheduling, and escalation of emergency repairs. Furthermore, it provides automatic early warnings for multiple consecutive failed detections, enabling preventative maintenance and reducing elevator downtime.

[0031] (4) Existing passive protection schemes only set a single door opening protection threshold and do not have a graded judgment logic for early diagnosis of attenuation. They can only cut off after a fault occurs and cannot provide early warning of performance degradation.

[0032] This invention sets an effectiveness judgment threshold that is lower than the protection threshold. It can determine the performance degradation of the device before the door opening width reaches the safety cut-off limit, arrange maintenance in advance, and avoid directly triggering the elevator protection shutdown after the safety cut-off threshold is reached, thus realizing advanced fault diagnosis. Attached Figure Description

[0033] 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.

[0034] Figure 1 This is a schematic diagram of the overall process of the automated detection method for the elevator car door opening restriction device of the present invention; Explanation of reference numerals in the attached figures: S1, Detection condition judgment; S2, Car leaving the door zone judgment; S3, Slow door opening; S4, Termination of detection fault judgment; S5, Resumption of normal operation; S6, Cloud result judgment. Detailed Implementation

[0035] 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.

[0036] First embodiment; refer to Figure 1 As shown, this invention provides an automated detection method for elevator car door opening restriction devices. This embodiment is applicable to elevator systems equipped with a door operator torque control module, a door width encoder, an in-car human-machine interaction device, a camera (optional), and a cloud-based remote communication module. The execution steps include: S1, Detection condition verification and mode switching: The cloud sends a detection request to the elevator; the elevator locally verifies whether the elevator is in fully automatic operation, door-closed standby, or has doorless system-related faults. After all conditions are met, it switches to a dedicated detection operation mode. S2, Car moves away from door zone at low speed: The car moves at low speed with a preset displacement (greater than the elevator door zone range by 400mm), and the car stops outside the door zone; if it cannot move away from the door zone after multiple runs, it is judged as abnormal and the detection is directly terminated; S3, Controlled Force Opening from Outside the Door Zone: The door operator applies an increasing torque to open the door, with the upper limit of the torque not exceeding 1000N; the door operator encoder collects the door opening width in real time; if the opening width reaches the preset protection threshold, the door opening stops immediately and the abnormality is recorded; the maximum opening width is recorded when the preset detection time is reached. S4, Safety Monitoring (executed in parallel with S2 and S3): Real-time monitoring of passenger signals, door opening width, door opening speed, landing door lock signals, detection timeout, and elevator high-priority operation mode; if any safety monitoring is triggered, the door opening action is immediately terminated and the detection process is exited. S5, Resume Normal Operation: After the test is completed or the abnormal exit occurs, the car returns to the original stop floor at low speed; performs a complete normal door opening and closing operation to verify the door system function; exits the dedicated test operation mode and the elevator resumes fully automatic operation; uploads the maximum door opening width and abnormal type data to the cloud. S6, Cloud Result Judgment: The cloud compares the door opening width with the preset validity threshold to determine whether the limiting device is normal or malfunctioning; if malfunctioning, a maintenance work order is generated; if the device is removed due to safety monitoring, it is handled according to the abnormality type.

[0037] Second embodiment; The second embodiment of the present invention is a further improvement based on the first embodiment described above. The same parts will not be repeated. The specific improvements are as follows; 1) Cloud-based scheduling: Configure timed scheduling rules in the cloud to limit the issuance of detection tasks to late-night, unattended periods, thus avoiding peak passenger flow. 2) Local secondary verification of elevator: After receiving the cloud detection request, the safety circuit, landing door lock, and car door are checked for faults and there are no internal or external call registrations. 3) Cloud-based tiered processing: (1) Normal test result: Archive the test record for this test and schedule the next test according to the cycle; (2) Equipment failure: Generate a manual on-site verification maintenance work order; (3) Passengers in the car / fire mode preemptive exit: The cloud-based system reissues the detection task after a preset interval; (4) Warning-type equipment failures: Rescheduling is allowed, and manual inspection is triggered after 3 consecutive detection failures; (5) Elevator stoppage malfunctions: Issue an emergency repair work order directly; (6) Frequent failures of the back door system: After the test, the door failed M times in N consecutive opening and closing operations, and the special maintenance work order was upgraded in the cloud.

[0038] Third embodiment; The third embodiment of the present invention is a further improvement based on the first or second embodiment described above. The same parts will not be repeated. The specific improvements are as follows; Parallel security monitoring in S4 includes six types of synchronous monitoring: 1. Passenger detection inside the car: The detection will immediately exit if any of the following signals are valid: activation of the registration button inside the car, triggering of the door open / close button, or detection of a person by the camera inside the car. 2. Dual verification of door opening width: The door operator encoder and the door limit switch synchronously collect the door opening width. If the value exceeds the protection threshold, the door opening command is immediately cut off; if the encoder and limit switch values ​​do not match, it is also judged as an abnormality and exits. 3. Door opening speed monitoring: The door opening speed is collected in real time during the controlled door opening phase, and the door opening is stopped immediately if the preset speed threshold is exceeded; 4. Landing door lock monitoring: If the landing door lock signal is disconnected during the opening process from the outside of the door zone, it is determined that there is a risk of the landing door being opened unexpectedly, and the opening will be stopped immediately; 5. Global Timeout Monitoring: The overall detection process has a maximum time limit. If the process fails to complete within the time limit, it will automatically exit and record the fault. 6. High-priority mode preemption: When the elevator receives an independent operation or fire protection operation command, it immediately terminates the detection, and responds to the high-priority command after the car is leveled and reset.

[0039] Fourth embodiment; The fourth embodiment of the present invention is a further improvement based on any one of the first to third embodiments described above. The same parts will not be described again. The specific improvements are as follows; 1. Torque increment control: The gantry crane starts with 1 / 5 of the rated torque and increases the torque at a constant speed. The maximum torque limit shall not exceed 1000N as specified in the standard. 2. Dual threshold parameter configuration: Set the validity threshold: W_valid and the protection threshold: W_protection. The two width thresholds must meet the condition that W_valid < W_protection ≤ 50mm (TSG T700 specification). 3. Test result determination: If the maximum door opening width ≤ W_ is valid, the device is in good working order; if W_ is valid < maximum door opening width ≤ W_ is protected, the device performance is degraded, and early warning maintenance is required; if the maximum door opening width > W_ is protected, the device is faulty, the door opening should be stopped immediately and a maintenance work order should be issued.

[0040] Fifth embodiment; This invention provides an automated detection system for elevator car door opening restriction devices, which is used to implement the automated detection method for elevator car door opening restriction devices described in the first to fourth embodiments above. First, it should be noted that the automated detection system for elevator car door opening restriction devices provided by this invention is a preferred solution for implementing the automated detection method for elevator car door opening restriction devices, but it should not be construed as a limitation on the automated detection system for elevator car door opening restriction devices. Any hardware capable of implementing the corresponding functions of this invention should be considered as part of the automated detection system for elevator car door opening restriction devices described in this invention, which includes: Cloud-based dispatching platform, elevator local control unit, door operator drive module, door width acquisition module, car occupant detection module, safety signal acquisition module; Cloud-based dispatching platform: It communicates with the elevator's local control unit to issue detection tasks, receive detection data, automatically determine device status, and generate maintenance work orders; Elevator local control unit: It is communicatively connected to the door operator drive module, door width acquisition module, car occupant detection module, and safety signal acquisition module; it is configured with dedicated detection operation mode switching logic, car door-out zone operation control logic, and post-detection reset control logic. Door operator drive module: Receives commands from the elevator local control unit and outputs an increasing controlled torque to drive the car door to open; the upper limit of the torque does not exceed 1000N; Door width acquisition module: includes door operator encoder and door limit switch, which collects the car door opening width in real time and transmits it back to the elevator local control unit; Car occupant detection module: includes in-car operation buttons and in-car camera, outputs in-car occupant identification signal; Safety signal acquisition module: Acquires floor door lock signals, door opening speed signals, elevator operation mode signals, and detection timing signals; 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.

[0041] 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 automated detection method for an elevator car door opening restriction device, characterized in that, Includes the following steps: S1, the cloud sends a detection request to the elevator, the elevator verifies the detection prerequisites locally, and switches to the dedicated detection operation mode after the prerequisites are met. S2 controls the car to move at a low speed and to a preset displacement, causing the car to move away from the door zone; If the test fails to exit the gate zone after multiple attempts, it is considered abnormal and the test is terminated. S3 controls the door operator to actively apply the opening force with incremental torque and collects the car door opening width in real time; if the opening width reaches the preset protection threshold, the door opening is stopped immediately and the abnormality is recorded; after the preset detection time is reached, the maximum opening width is recorded. S4, the cloud determines the status of the car door opening restriction device based on the maximum opening width and the preset validity threshold, and executes the corresponding processing procedure based on the determination result.

2. The automated detection method for the elevator car door opening restriction device as described in claim 1, characterized in that: Steps S2 and S3 are executed in parallel with multiple security monitoring processes. When any security monitoring is triggered, the door opening is immediately terminated and the detection is exited.

3. The automated detection method for the elevator car door opening restriction device as described in claim 1, characterized in that: After the inspection is completed or the elevator exits abnormally, the elevator car is controlled to return to the original stopping and leveling position at low speed; a normal door opening and closing action is performed to re-inspect the door system; the dedicated inspection operation mode is exited and the elevator resumes fully automatic operation; the inspection data, including the maximum door opening width and the type of abnormality, is uploaded to the cloud.

4. The automated detection method for the elevator car door opening restriction device as described in claim 1, characterized in that, Step S1 also includes: configuring periodic scheduling rules for unattended periods in the cloud and issuing detection tasks; after receiving the detection request, the elevator performs a secondary verification of the safety circuit, floor door lock, and no internal or external call registration status locally.

5. The automated detection method for the elevator car door opening restriction device as described in claim 2, characterized in that, The multiple security monitoring systems include: in-car occupant identification and monitoring; The method for identifying and monitoring people inside the car is as follows: monitoring the action signal of the registration button inside the car, the trigger signal of the door opening and closing button, and the person identification signal of the camera inside the car. If any signal is valid, it is determined that there is someone inside the car, and the detection is immediately terminated.

6. The automated detection method for the elevator car door opening restriction device as described in claim 5, characterized in that, The multi-layered security monitoring also includes at least one of the following: (1) Door opening width monitoring: The door operator encoder works in conjunction with the door travel switch to synchronously verify the door opening width. If the width exceeds the protection threshold or the two values ​​do not match, the door opening will stop immediately. (2) Door opening speed monitoring: Real-time acquisition of car door opening speed; if the speed exceeds the preset threshold, the door opening will stop immediately. (3) Floor door lock monitoring: If the floor door lock signal is disconnected during the detection process, the door opening will be terminated immediately; (4) Timeout monitoring: If the total detection time exceeds the preset limit, the detection will automatically exit; (5) Operation mode preemption monitoring: When the elevator receives high-priority operation instructions such as independent operation or fire protection operation, it immediately exits the monitoring.

7. The automated detection method for the elevator car door opening restriction device as described in claim 1, characterized in that, The cloud-based processing procedure includes: 1) Maximum door opening width ≤ validity threshold: The device is deemed normal, the test record is archived, and the next test is scheduled by the cloud on a periodic basis; where validity threshold < protection threshold ≤ 50mm; 2) Maximum door opening width > validity threshold: Determine device failure and generate manual review maintenance work order; 3) Due to passengers in the car or high-priority mode preemption and exit: the cloud will reissue the detection task at a preset interval; 4) Exit due to fault: Rescheduling is allowed. If multiple consecutive tests fail, an emergency repair work order will be issued directly.

8. The automated detection method for the elevator car door opening restriction device as described in claim 7, characterized in that, In step S3, the method for controlling the gantry crane torque and setting the width threshold is as follows: the gantry crane initially uses the rated torque fraction to start and the torque increases at a constant speed, with the maximum torque limit being less than 1000N.

9. The automated detection method for the elevator car door opening restriction device as described in claim 3, characterized in that: After the door system is re-inspected, if the door system fails M times in a series of N consecutive opening and closing operations after the inspection, a special maintenance work order for the door system will be generated in the cloud, where N≥2 and M≥1.

10. An automated detection and control system for an elevator car door opening restriction device, used to execute the automated detection method for the elevator car door opening restriction device as described in any one of claims 1-7, characterized in that, This includes a cloud-based dispatching platform, elevator local control unit, door operator drive module, door width acquisition module, car occupant detection module, and safety signal acquisition module; The cloud-based scheduling platform communicates bidirectionally with the elevator's local control unit to issue detection tasks, receive detection data, determine device status, and generate maintenance work orders. The elevator local control unit is electrically connected to the door operator drive module, door width acquisition module, car occupant detection module, and safety signal acquisition module, respectively. The elevator local control unit has built-in dedicated detection operation mode switching logic, car door detachment zone control logic, and detection reset control logic. The door operator drive module is used to receive instructions from the elevator local control unit and output an increasing controlled torque to drive the car door to open. The door width acquisition module is used to collect the car door opening width in real time and transmit it back to the elevator local control unit. The passenger detection module is used to output passenger identification signals. The safety signal acquisition module is used to acquire floor door lock signals, door opening speed signals, elevator operation mode signals, and detection timing signals.

Images