An escalator network safety operation monitoring system

Abstract

The present invention relates to the technical field of escalator and moving walkway monitoring systems, and specifically discloses an escalator network-connected safe operation monitoring system, comprising: an escalator function detection subsystem, which is used to detect the state of the escalator function system to record the operation and braking data of the escalator in real time; a self-monitoring subsystem, which is used to regularly perform no-load downward deceleration detection on the escalator to determine the no-load downward acceleration numerical state of the escalator; a brake subsystem, which is used to control the brake function of the escalator's working brake and auxiliary brake; a power module; a control module, which is used to store and compare the data detected by the escalator function detection subsystem and the self-monitoring subsystem to determine whether to trigger the brake subsystem; the escalator network-connected safe operation monitoring system can prevent or resolve the occurrence of personal safety accidents and equipment damage and other events, and at the same time, greatly reduce the workload of elevator maintenance personnel, supervisors and third-party inspectors.

Description

Technical Field

[0001] The present invention relates to the technical field of escalator and moving walkway monitoring systems, and in particular to an escalator networked safety operation monitoring system. Background Art

[0002] The escalator auxiliary brake is required to be installed on public transportation escalators used in crowded places such as urban rails, railway stations, airports, and bus stations. It is a very important safety component for high-load carrying equipment. Its main function is to be able to operate in emergency situations (especially under high load) such as failure of the working brake, reversal of the escalator, and overspeed, and play the role of slowing down and stopping the escalator. It is the last "checkpoint" to prevent the escalator or moving walkway from sliding out of control.

[0003] We know that the brake is an important component of the escalator. When the main brake cannot effectively stop the escalator, the escalator will reverse and slip, causing harm to the passengers.

[0004] Since the main brake loses the power control of the steps due to the disengagement or disconnection of the drive chain, in this case, whether the action of the auxiliary brake is reliable will play a decisive role in the consequences of the accident. However, the existing escalators have the following problems:

[0005] 1. Due to the normal operation of the escalator, the deceleration speed is controlled at 0.2-1.0g n In fact, it can only be tested and confirmed under no-load operation. Sometimes the deceleration is too large. If the elevator stops suddenly for some reason during the actual operation, the deceleration will be too large, which may cause passengers to fall and get injured.

[0006] 2. The additional brakes of most escalators are installed in a relatively hidden location, which is inconvenient for maintenance. As a result, the additional brakes are often neglected during the maintenance of the escalator;

[0007] 3. On the other hand, many elevator maintenance personnel do not fully understand the working principle and maintenance methods of the auxiliary brake, and fail to master the correct skills, making it impossible to properly maintain the auxiliary brake.

[0008] 4. Some escalator manufacturers only keep the additional brake on-load stopping at the type test stage, and do not conduct functional inspection after installation. Some units also do not conduct reliability tests and corresponding maintenance after completing a functional inspection when delivering the escalator, which buries the potential safety hazard of ineffective stopping.

[0009] 5. In addition, the current national standard only provides for detection devices for the 1.4 times overspeed protection and stopping distance detection items of the electronic safety function control module, but does not provide for regular functional inspection of the additional brakes on site after acceptance. There is also no specific value for the stopping distance, only the deceleration requirements during operation. Summary of the invention

[0010] In order to overcome the defects of the prior art, the present invention provides an escalator network safety operation monitoring system and a brake self-test method to solve the above-mentioned problems.

[0011] The technical solution adopted by the present invention to solve the technical problem is: an escalator network safety operation monitoring system, characterized in that it includes:

[0012] An escalator function detection subsystem, which is used to detect the status of the escalator function system through a detection step to record the operation and braking data of the escalator in real time;

[0013] The self-monitoring subsystem is used to periodically detect the no-load downward deceleration of the escalator to determine the numerical state of the no-load downward acceleration of the escalator;

[0014] The brake subsystem is used to control the brake function of the escalator's working brake and auxiliary brake;

[0015] A power module, which is used to provide power to the escalator function system;

[0016] A control module, which is used to store and compare the data detected by the escalator function detection subsystem and the self-monitoring subsystem, and determine whether to trigger the brake stop subsystem;

[0017] The communication module connects the control module to the Internet via 5G or Beidou communication network for data upload and command transmission;

[0018] The detection steps of the escalator function detection subsystem include:

[0019] S1. Check the braking distance and approximate uniform deceleration value of the escalator's working brake and auxiliary brake, and determine the braking distance and approximate uniform deceleration value to be between 0.6 and 0.8 g. n The braking distance and approximate uniform deceleration value of the escalator are compared with the braking load digital model of the virtual host through the transfer function;

[0020] S2. Determine whether there is a braking abnormality. If there is a dynamic abnormality, the transfer function is output to the control module and a command is issued to the brake subsystem through the control module to stop the escalator or issue maintenance instructions and information.

[0021] Furthermore, the escalator operation system includes a truss, a handrail and steps arranged on the truss, a main power unit, a working brake and an additional brake;

[0022] The truss is provided with a main driving wheel for driving the steps to move, and an encoder is connected to one side of the main driving wheel;

[0023] The encoder is used to control and detect the real-time direction and speed of the main driving wheel to obtain the running and braking data of the escalator. A control module installed in the truss is provided on one side of the power main engine;

[0024] A virtual host is stored and installed in the control module;

[0025] The working brake is connected to the main engine reduction box through the motor, and is used to make the escalator have a nearly uniform deceleration stopping process until it stops, and keep the escalator in a stopped state;

[0026] The additional brake is connected to the truss and the main drive wheel through transmission parts and electrical parts respectively and is fixed reliably. The steps are connected to the main drive wheel through traction chains. It is used when the working brake has abnormalities such as the step overspeeding or the drive chain breaking. At this time, the additional brake slows down and stops the main drive wheel of the escalator and keeps the escalator stationary.

[0027] Furthermore, the escalator function system includes 1.2 times overspeed protection, 1.4 times overspeed protection, reversal protection, step missing protection, handrail underspeed protection, brake release monitoring and stopping distance detection.

[0028] Specifically, the escalator operation and braking data include braking distances of the working brake and the auxiliary brake and approximate uniform deceleration values.

[0029] Furthermore, the escalator self-monitoring subsystem also includes the following monitoring steps:

[0030] In the no-load stage of the escalator, the escalator is put into normal operation state, and the no-load downward acceleration value of the working brake and the no-load downward acceleration value of the auxiliary brake are respectively detected;

[0031] Determine whether the no-load downward acceleration values ​​of the working brake and the auxiliary brake are abnormal;

[0032] When the no-load downward acceleration values ​​of the working brake and the detection auxiliary brake are normal, the no-load downward acceleration values ​​of the working brake and the detection auxiliary brake are stored in the control module, and the escalator operates normally;

[0033] When the no-load downward acceleration values ​​of the working brake and the detection auxiliary brake are abnormal, the escalator sends a command to the brake stop subsystem through the control module to stop the escalator and issue a maintenance command.

[0034] Specifically, the no-load downward acceleration value of the working brake and the detection additional brake is 0.6~0.8g n .

[0035] Specifically, when the escalator is in the inspection and operation state, an automatic simulation test of full-load or no-load descent is carried out, and its data is stored in the braking load digital model formed by the virtual host as a standard value for subsequent action comparison.

[0036] More specifically, the steps of obtaining the digital model of the braking load include:

[0037] First, during the escalator inspection process, the inspection data is used to establish an initial database and stored in the virtual host;

[0038] The braking distance and the approximate uniform deceleration value during the braking process are determined to be between 0.6 and 0.8 gn, and are stored in the primary database to form a secondary database;

[0039] During the no-load downlink automatic simulation test, the no-load data is simultaneously stored in the secondary database to form a digital model of the braking load.

[0040] Furthermore, the transfer function is the following function formula:

[0041]

[0042] Among them, X i is the input value and X0 is the output value.

[0043] Specifically, the braking distance and approximate uniform deceleration values ​​of the escalator are compared with the braking load digital model of the virtual host through the transfer function. If it is judged to be normal, the no-load downward acceleration value of the self-monitoring subsystem is measured to obtain feedback, which is again input into the transfer function for comparison and judgment.

[0044] The beneficial effects of the present invention are:

[0045] 1. The control module stores and compares the data detected by the escalator function detection subsystem and the self-monitoring subsystem to determine whether to trigger the brake subsystem to stop the escalator. The escalator function detection subsystem can detect the status of the escalator function system in real time, and cooperate with the self-monitoring subsystem to regularly detect the escalator's no-load downward deceleration, which can better understand the status of the escalator function system, prevent or resolve personal safety accidents and equipment damage. At the same time, the workload of elevator maintenance personnel, supervisors and third-party inspectors is greatly reduced, making difficult problems easy;

[0046] 2. The communication module facilitates the networking of the control module, which is convenient for supervision by managers at all levels and can get the response and processing of maintenance personnel in the first time. The key point is that when the operating status of the escalator is intelligently processed or solved, its safe use and effective management become a reality. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 It is a structural diagram of the escalator operation system of the present invention.

[0048] Figure 2 This is a composition diagram of the escalator network safety operation monitoring system of the present invention.

[0049] Figure 3 This is a transfer function determination flow chart of the present invention. DETAILED DESCRIPTION

[0050] The specific embodiments of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0051] like Figure 1 As shown, an escalator network safety operation monitoring system includes:

[0052] An escalator function detection subsystem, which is used to detect the status of the escalator function system through a detection step to record the operation and braking data of the escalator in real time;

[0053] The self-monitoring subsystem is used to periodically detect the no-load downward deceleration of the escalator to determine the numerical state of the no-load downward acceleration of the escalator;

[0054] The brake subsystem is used to control the brake function of the escalator's working brake and auxiliary brake;

[0055] A power module, which is used to provide power to the escalator function system;

[0056] The control module uses AI technology to store and compare the data detected by the escalator function detection subsystem and the self-monitoring subsystem to determine whether to trigger the brake subsystem. Since the control module stores and compares the data detected by the escalator function detection subsystem and the self-monitoring subsystem, it is easy to determine whether to trigger the brake subsystem to stop the escalator. The escalator function detection subsystem can detect the status of the escalator function system in real time, and cooperate with the self-monitoring subsystem to regularly detect the no-load downward deceleration of the escalator, so as to better understand the status of the escalator function system, prevent or resolve personal safety accidents and equipment damage. At the same time, the workload of elevator maintenance personnel, supervisors and third-party inspectors is greatly reduced, making difficult problems easy;

[0057] The communication module connects the control module to the Internet through the 5G or Beidou communication network for data upload and command transmission. The communication module facilitates the connection of the control module to the Internet, which is convenient for management personnel at all levels to supervise and can get the response and processing of maintenance personnel in the first time. The key point is that when the operating status of the escalator is intelligently processed or resolved, its safe use and effective management become a reality.

[0058] like Figure 2 As shown, the escalator operation system includes a truss 1, a handrail 3 and steps 2 arranged on the truss, a working brake and an additional brake. A main driving wheel 4 for driving the step 2 to run is installed on the truss 1, and an encoder 5 is connected to one side of the main driving wheel 4. The encoder 5 is used to control and detect the real-time direction and real-time speed of the main driving wheel 4 (i.e., the step 2 is running) to obtain the operation and braking data of the escalator, wherein the operation and braking data of the escalator include the braking distance of the working brake and the additional brake and the approximate uniform deceleration value. A brake installed on the truss is arranged on one side of the power main machine. 1, wherein a virtual host is stored and installed in the control module 6; the working brake is connected to the host reduction box through the motor, and is used to make the escalator have a nearly uniform deceleration stopping process until it stops, and keep the escalator in a stopped state; the additional brake is respectively connected to the truss 1 and the main drive wheel 4 through the transmission parts and the electrical parts, and is fixed reliably, and the step 2 is connected to the main drive wheel 4 through the traction chain, and is used for the step 2 to go down overspeed or the drive chain is broken. When the working brake is abnormal, at this time, the additional brake decelerates and stops the escalator main drive wheel 4, and keeps the escalator in a stationary state.

[0059] The encoder 5 is connected to the control module 6 so that the control module 6 can obtain corresponding data in time, so that the control module 6 can judge whether the escalator is abnormal according to the obtained data, and upload information through the communication module or notify the maintenance personnel for maintenance in time.

[0060] The escalator function system includes 1.2 times overspeed protection, 1.4 times overspeed protection, reverse protection, step loss protection, handrail underspeed protection, brake release monitoring and stopping distance detection. The following is a description of the escalator function system:

[0061] 1.2 times overspeed protection: When the monitored escalator speed exceeds the nominal speed by 1.2 times, the 1.2 times safety relay is disconnected to cut off the power supply of the escalator's working brake, safety circuit and control circuit, causing it to stop running immediately.

[0062] 1.4 times overspeed protection: When the speed of the monitored escalator exceeds 1.4 times the nominal speed, the 1.2 times safety relay and the 1.4 times safety relay are disconnected at the same time to cut off the power supply of the escalator's working brake, auxiliary brake, safety circuit and control circuit, causing it to stop running immediately;

[0063] Reverse protection: When the running direction of the monitored escalator or inclined walkway (α≥ 6°) does not conform to the specified running direction, the 1.2-fold safety relay and the 1.4-fold safety relay are disconnected to cut off the power supply of the escalator's working brake, auxiliary brake, safety circuit and control circuit, causing it to stop running immediately;

[0064] Step missing protection: A detection device for detecting step missing is installed at both ends of the escalator drive. Once a step missing is detected, the 1.2 times safety relay is disconnected to cut off the power supply of the escalator's working brake safety circuit and control circuit, so that the escalator stops before the gap appears from the comb plate position caused by the step missing;

[0065] Handrail underspeed protection: monitor the handrail speed of the escalator. When its speed is lower than 15% of the nominal speed of the step speed, the 1.2 times safety relay is disconnected to cut off the power supply of the escalator's working brake, safety circuit and control circuit, causing it to stop running immediately.

[0066] Brake release monitoring: After the escalator starts, the brake system is not released and the escalator cannot start; when monitoring the escalator operation, when its brake command and brake feedback logic are inconsistent, disconnect the 1.2 times safety relay to cut off the power supply of the escalator's working brake, safety circuit and control circuit, so that it stops running immediately;

[0067] Braking distance detection: If the braking distance exceeds 1.2 times of the specified maximum value (0.6-0.8gn), stop the vehicle immediately and restart it only after the fault lock is reset. Maintenance personnel should check the braking system and take corrective and preventive measures before resetting the fault.

[0068] Combination Figure 1 and Figure 3 As shown, the detection steps of the escalator function detection subsystem in this embodiment include:

[0069] S1. Check the braking distance and approximate uniform deceleration value of the escalator's working brake and auxiliary brake, and determine the braking distance and approximate uniform deceleration value to be between 0.6 and 0.8 g. n The braking distance and approximate uniform deceleration value of the escalator are compared with the braking load digital model of the virtual host through the transfer function;

[0070] S2. Determine whether there is a braking abnormality. If there is a braking abnormality, the transfer function is output to the control module 6 and a command is issued to the brake subsystem through the control module 6 to stop the escalator or issue maintenance instructions and information.

[0071] Through the detection steps of the escalator function detection subsystem, the abnormality of the braking distance of the working brake and the auxiliary brake can be discovered in time, so that the control module 6 can issue a brake stop instruction and a maintenance instruction to prevent accidents.

[0072] The escalator self-monitoring subsystem also includes the following monitoring steps:

[0073] In the no-load stage of the escalator, the escalator is put into normal operation state, and the no-load downward acceleration value of the working brake and the no-load downward acceleration value of the auxiliary brake are respectively detected;

[0074] Determine whether the no-load downward acceleration values ​​of the working brake and the detection additional brake are abnormal. The no-load downward acceleration values ​​of the working brake and the detection additional brake are 0.6~0.8g n ;

[0075] When the no-load downward acceleration values ​​of the working brake and the detection additional brake are normal, the no-load downward acceleration values ​​of the working brake and the detection additional brake are stored in the control module 6, and the escalator operates normally;

[0076] When the no-load downward acceleration values ​​of the working brake and the detection auxiliary brake are abnormal, that is, exceeding 0.6~0.8g n If the escalator is within the numerical range, the control module 6 sends a command to the brake subsystem to stop the escalator and issue a maintenance command.

[0077] The escalator self-monitoring subsystem can be used to perform self-monitoring during the no-load period, so as to promptly detect whether the no-load downward acceleration value of the escalator is abnormal, thereby preventing passengers from using faulty escalators, preventing accidents in advance, and playing an early warning role.

[0078] During the monitoring process of the escalator self-monitoring subsystem, an automatic simulation test of no-load downward movement is carried out when the escalator stops running, and its data is stored in the braking load digital model formed by the virtual host as a standard value for comparison of subsequent actions, so as to better discover quality problems of the escalator.

[0079] The brake load digital model is used as a standard for numerical comparison. The steps for obtaining the brake load digital model include:

[0080] First, during the escalator inspection process, the inspection data is used to establish an initial database and stored in the virtual host;

[0081] The braking distance and approximate uniform deceleration value during the braking process are determined to be between 0.6 and 0.8 gn (the larger value is taken for no-load test), and are stored in the primary database to form a secondary database, where the braking process includes the braking process of the working brake and the auxiliary brake;

[0082] During the no-load downlink automatic simulation test, the no-load data is simultaneously stored in the secondary database to form a digital model of the braking load.

[0083] The transfer function in this implementation is as follows:

[0084]

[0085] Among them, X i is the input value and X0 is the output value.

[0086] like Figure 3 As shown, specifically, the braking distance and approximate uniform deceleration values ​​of the escalator are compared with the braking load digital model of the virtual host through the transfer function. If it is judged to be normal, the no-load downward acceleration value of the self-monitoring subsystem is measured to obtain the feedback value, which is again input into the transfer function for comparison and judgment.

[0087] In order to better understand the implementation of this solution, the following are relevant embodiments:

[0088] 1. Protection against escalator overspeed of 1.2 times: the braking distance of the working brake and its approximate uniform deceleration value are both entered into the virtual host for storage and comparison through the encoder 7 and the control module 6. During the braking process of the working brake, they are compared with the digital model of the braking load stored in the virtual host. When the recognition system shows an abnormality, the control module 6 issues a stop command; or sends a maintenance command and information to the escalator; or displays that the escalator has stopped running for repair.

[0089] If the working brake stops in the brake load determination table, when the deceleration exceeds 1.2 times the specified maximum value (0.6-0.8gn), the vehicle should be stopped immediately and restarted only after the fault lock is reset. The maintenance personnel should inspect and repair the brake system before resetting the fault and take corrective measures.

[0090] 2. Overspeed 1.4 times protection: The braking distance of the additional brake and its approximate uniform deceleration and other values ​​are stored and compared in the virtual host through the encoder 7 and the control module 6. During the braking process of the additional brake, when compared with the digital model of the braking load stored in the virtual host, if the identification system shows an abnormality, the control module 6 will issue a stop command; or send a maintenance command and information to the escalator; or display that the escalator has stopped running for repair.

[0091] If the additional brake stops in the brake load determination table, when the deceleration exceeds 1.2 times the specified maximum value (0.6-0.8gn), the vehicle should be stopped immediately and restarted only after the fault lock is reset. The maintenance personnel should inspect and repair the brake system before resetting the fault, and take corrective and preventive measures.

[0092] 3. For the reverse protection, step loss protection, handrail underspeed protection, brake release monitoring, and stopping distance detection functions in the above escalator function system, they are electrically connected with their own electronic devices and encoder 7, and are stored and compared with the control module 6 in the virtual host. During the operation of the escalator, it is compared with various data stored in the virtual host. When the identification is displayed as abnormal, the operating system issues a stop command; or sends maintenance instructions and information to the escalator; or displays warning operations such as the escalator stops running for repair.

[0093] 5. The present invention can also use the Beidou land-based enhanced system to scan and locate the horizontal or inclined sections of the escalator steps when they are running, and to enter and store relevant data; and regularly and automatically complete the no-load downward deceleration monitoring program. That is, in a period of time when there are no passengers on the escalator, the automatic test function of the working brake and the additional brake is started to put the escalator into normal operation, and the no-load downward acceleration value is tested to see if it meets the specified value (0.6-0.8gn), and confirmed. If not, the escalator enters the state of waiting for maintenance and indicates it in text; if it meets the requirements, the data is stored and it enters normal operation. And enters the regular function automatic detection program.

[0094] In this embodiment, the Beidou land-based enhanced system can also be used to scan and locate the horizontal or inclined sections of the escalator steps when they are running, and to enter and store relevant data. The Beidou land-based enhanced system is a prior art and will not be described in detail here. The self-monitoring subsystem can also be monitored automatically and regularly, that is, during a period when there are no passengers on the escalator, the automatic test function of the working brake and the additional brake is started to put the escalator into normal operation. The no-load downward acceleration value is tested to see if it meets the specified value of 0.6 to 0.8 gn, and confirmed. If not, the escalator enters the waiting for maintenance state and indicates it in text. If it meets the requirements, the data is stored and switched to normal operation, and the regular function automatic detection program is entered. This monitoring function is particularly suitable for outdoor escalators.

[0095] In this embodiment, the status of the self-monitoring subsystem can also be used to record the operation and braking data of the escalator in real time and import them into the inspection system of a third-party elevator inspection agency. That is, through its 5G and other networked automatic detection systems, combined with the escalator-related technical parameters input by the customer online and the real-time operation and braking data monitored, the system automatically generates and prints out the whole machine inspection report at the output terminal of the inspection equipment of the third-party elevator inspection agency.

[0096] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments are made without departing from the principles and spirit of the present invention, and still fall within the scope of protection of the present invention.

Claims

1. An escalator network safety operation monitoring system, characterized in that: include: An escalator function detection subsystem, which is used to detect the status of the escalator function system through a detection step to record the operation and braking data of the escalator in real time; The self-monitoring subsystem is used to periodically detect the no-load downward deceleration of the escalator to determine the numerical state of the no-load downward acceleration of the escalator; The brake subsystem is used to control the brake function of the escalator's working brake and auxiliary brake; A power module, which is used to provide power to the escalator function system; A control module, which is used to store and compare the data detected by the escalator function detection subsystem and the self-monitoring subsystem, and determine whether to trigger the brake stop subsystem; The communication module connects the control module to the Internet via 5G or Beidou communication network for data upload and command transmission; The detection steps of the escalator function detection subsystem include: S1. Check the braking distance and approximate uniform deceleration value of the escalator's working brake and auxiliary brake, and determine the braking distance and approximate uniform deceleration value to be between 0.6 and 0.8 g. n The braking distance and approximate uniform deceleration value of the escalator are compared with the braking load digital model of the virtual host through the transfer function; S2. Determine whether there is a braking abnormality. If there is a braking abnormality, the transfer function is output to the control module (6) and a command is issued to the brake stop subsystem through the control module (6) to stop the escalator or issue a maintenance command and information. The steps of obtaining the digital model of the braking load include: First, during the escalator inspection process, the inspection data is used to establish an initial database and stored in the virtual host; The braking distance and approximate uniform deceleration value during braking are set between 0.6 and 0.8 g. n and store it in the primary database to form a secondary database; During the no-load downlink automatic simulation test, the no-load data is simultaneously stored in the secondary database to form a digital model of the braking load; The transfer function is the following function formula: Among them, X i is the input value, X0 is the output value; The braking distance and approximate uniform deceleration values ​​of the escalator are compared with the braking load digital model of the virtual host through the transfer function. If it is judged to be normal, the no-load downward acceleration value of the self-monitoring subsystem is measured to obtain the feedback value, which is again input into the transfer function for comparison and judgment.

2. The escalator network safety operation monitoring system according to claim 1 is characterized in that: The escalator operation system comprises a truss (1), a handrail (3) and steps (2) arranged on the truss, a main power unit, a working brake and an additional brake; A main driving wheel (4) for driving the steps (2) is installed on the truss (1), and an encoder (5) is connected to one side of the main driving wheel (4); The encoder (5) is used to control and detect the real-time direction and real-time speed of the main driving wheel (4) to obtain the operation and braking data of the escalator. A control module (6) installed in the truss (1) is provided on one side of the main power unit; The control module (6) stores and installs a virtual host; The working brake is connected to the main engine reduction box through the motor, and is used to make the escalator have a nearly uniform deceleration stopping process until it stops, and keep the escalator in a stopped state; The auxiliary brake is connected to the truss (1) and the main drive wheel (4) respectively through transmission parts and electrical parts, and is fixed reliably. The step (2) is connected to the main drive wheel (4) through a traction chain. When the working brake is abnormal, such as the step (2) overspeeding or the drive chain breaking, the auxiliary brake decelerates and stops the main drive wheel (4) of the escalator, and keeps the escalator in a stationary state.

3. The escalator network safety operation monitoring system according to claim 1 is characterized in that: The escalator function system includes 1.2 times overspeed protection, 1.4 times overspeed protection, reverse protection, step missing protection, handrail underspeed protection, brake release monitoring and stopping distance detection.

4. The escalator network safety operation monitoring system according to claim 2 is characterized in that: The escalator operation and braking data include the braking distance of the working brake and the auxiliary brake and the approximate uniform deceleration value.

5. The escalator network safety operation monitoring system according to claim 1 is characterized in that: The escalator self-monitoring subsystem also includes the following monitoring steps: In the no-load stage of the escalator, the escalator is put into normal operation state, and the no-load downward acceleration value of the working brake and the no-load downward acceleration value of the auxiliary brake are respectively detected; Determine whether the no-load downward acceleration values ​​of the working brake and the auxiliary brake are abnormal; When the no-load downward acceleration values ​​of the working brake and the detection auxiliary brake are normal, the no-load downward acceleration values ​​of the working brake and the detection auxiliary brake are stored in the control module (6), and the escalator operates normally; When the no-load downward acceleration values ​​of the working brake and the detection auxiliary brake are abnormal, the escalator sends a command to the brake stop subsystem through the control module (6), stops the escalator from running, and issues a maintenance command.

6. The escalator network safety operation monitoring system according to claim 5, characterized in that: The no-load downward acceleration value of the working brake and the detection additional brake is 0.6~0.8gn.

7. The escalator network safety operation monitoring system according to claim 5, characterized in that: When the escalator is in the inspection and operation state, an automatic simulation test of full-load or no-load descent is carried out, and its data is stored in the braking load digital model formed by the virtual host as a standard value for comparison of subsequent actions.

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