APS system for maintenance of vertical elevator and use method of APS system

Abstract

The invention discloses an APS system for maintenance of a vertical elevator and a using method of the APS system. The APS system comprises a fault monitoring module, an APS server and a mobile phone APP terminal. The fault monitoring module collects the brand, the model, the position, the elevator safety circuit state, the hall door lock circuit state, the car door lock circuit state and the brake frequency of an elevator and transmits the information to the APS server through a 4G / 5G network. The APS server obtains a lowest maintenance personnel cost scheme and an optimal elevator maintenance scheduling plan according to a brake shoe wear empirical formula, a maintenance man-hour model formula and a maintenance personnel cost model formula, and issues a maintenance task to the mobile phone APP terminal; the mobile phone APP terminal reminds corresponding maintenance personnel to complete work and submits an electronic customer return visit list, and the customer completes return visit in the APP; according to the method, the real-time running state information of the elevator is networked, the lowest maintenance personnel cost and the optimal maintenance scheduling plan are realized according to the elevator state and fault information, and the maximum elevator maintenance efficiency is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of elevator maintenance, and in particular to an APS system for elevator maintenance and a method of using the system. Background Art

[0002] With the acceleration of urbanization, the number of elevators, as an indispensable means of vertical transportation in high-rise buildings, has increased rapidly. The safe operation of elevators is directly related to the safety of people's lives and property, so elevator maintenance is of vital importance. However, traditional elevator maintenance management methods are mostly based on post-fault maintenance and regular maintenance, and fault diagnosis is based on on-site inspection and operation combined with fault code reading on the display screen. Toshiba and Hitachi both use this method, which results in low maintenance efficiency.

[0003] With the development of science and technology, new elevator maintenance and management methods have also emerged. For example, Chinese patent CN119079729A discloses a cloud-based elevator maintenance and management method, device and system that uses real-time collection of elevator data, and obtains warning results through a pre-trained fault warning model to complete the automation and intelligence of elevator maintenance and management. However, the inconsistency of elevator electrical control systems and communication interfaces under different brands makes it impossible to directly read elevator sensor data, and the elevator operation status data cannot be remotely monitored. Therefore, how to design an elevator maintenance APS system for remote monitoring, fault diagnosis, low operation and maintenance costs, and reasonable dispatch is a technical problem that urgently needs to be solved. Summary of the invention

[0004] In view of this, the present invention proposes an APS system for elevator maintenance and a method of using the system to solve technical problems of all existing brands of elevators such as difficulty in real-time monitoring, difficulty in fault diagnosis, high operation and maintenance costs, and complex dispatching.

[0005] To achieve the above object, the technical solution of the present invention is implemented as follows:

[0006] On the one hand, the present invention provides an APS system for elevator maintenance, which includes a fault monitoring module, an APS server and a mobile phone APP terminal;

[0007] The fault monitoring module is connected to the APS server via a 4G / 5G network to collect information on the brand, model, location, elevator safety circuit status, hall door lock circuit status, car door lock circuit status, and brake times of the elevator, and the fault monitoring module transmits the information to the APS server via the 4G / 5G network;

[0008] The APS server is connected to the mobile phone APP terminal through a 4G / 5G network to receive real-time information from the fault monitoring module. According to the elevator maintenance requirements provided by the elevator manufacturer, the technical level of the maintenance personnel of the maintenance company, the maintenance working hours, and the maintenance information content, the brake shoe wear experience formula, the maintenance working hour model formula, and the maintenance personnel cost model formula are substituted. The minimum maintenance personnel cost plan and the optimal maintenance scheduling plan for the elevator are calculated in sequence by enumeration method, and the maintenance tasks are sent to the mobile phone APP terminal through the Internet;

[0009] The mobile phone APP terminal receives the work order task plan of the APS server through the 4G / 5G network, uses the APP pop-up window to remind the corresponding maintenance personnel to complete the corresponding work, and submit the electronic customer return form.

[0010] Preferably, the fault monitoring module includes a safety circuit current sensor, a hall door lock circuit current sensor, a car door lock circuit current sensor, a brake coil current sensor, a keyboard, a display, an MCU controller and a 4G / 5G module;

[0011] The safety loop current sensor is connected to the AD port of the MCU controller, and is used to collect the current value of the elevator safety loop, and send the signal to the MCU controller via the AD port at 4-20mA;

[0012] The hall door lock loop current sensor is connected to the AD port of the MCU controller, and is used to collect the current value of the elevator hall door lock loop, and send the signal to the MCU controller via the AD port at 4-20mA;

[0013] The car door lock loop current sensor is connected to the AD port of the MCU controller, and is used to collect the current value of the elevator car door lock loop, and send the signal to the MCU controller via the AD port at 4-20mA;

[0014] The brake coil current sensor is connected to the AD port of the MCU controller, and is used to collect the current value of the elevator brake coil, and send the signal to the MCU controller via the AD port at 4-20mA;

[0015] The keyboard is connected to the I / O port of the MCU controller, and is used to input the brand, model, and location information of the elevator, and send the signal to the MCU controller via the I / O port;

[0016] The display is connected to the IIC port of the MCU controller, and is used to receive the brand, model, location, safety circuit status, hall door lock circuit status, car door lock circuit status and brake number information sent by the IIC port protocol of the MCU controller and complete the display;

[0017] The MCU controller is connected to the 4G / 5G module through a TTL serial port, and is used to receive query commands, collect the elevator safety circuit current, hall door lock circuit current and car door lock circuit current, and compare them with the preset current threshold range to determine the status of the safety circuit, hall door lock circuit and car door lock circuit, as well as calculate the number of brake times and determine the brake status through the number of changes in the brake coil current, which are issued by the 4G / 5G module.

[0018] On the other hand, the present invention provides a method for using an APS system for elevator maintenance, comprising the following steps:

[0019] S1. Power on the elevator power supply system and input the elevator brand number, model number, location number, average braking load and average braking speed through the fault monitoring module keyboard;

[0020] S2, collect the elevator safety circuit current, hall door lock circuit current, car door lock circuit current and brake times information through the fault monitoring module, and compare the collected information with the corresponding threshold interval preset in the fault monitoring module to determine whether the elevator has a fault;

[0021] S3. When the elevator fails, the fault monitoring module directly sends the fault information to the APS server;

[0022] S4. When the elevator has no faults, the APS server periodically sends a query command to the fault monitoring module. After receiving the query command, the fault monitoring module sends a response message and uploads the elevator brand, model, elevator safety circuit status, hall door lock circuit status, car door lock circuit status and brake times to the APS server;

[0023] S5. After the APS server receives the information sent by the fault monitoring module, it automatically determines the content of the regular maintenance operation of the elevator based on the empirical formula of brake shoe wear and the working time of the elevator;

[0024] S6. The APS server uses the maintenance time model formula and the maintenance personnel cost model formula according to the technical level of the maintenance personnel, the maintenance working hours and the maintenance information content, and calculates the lowest maintenance personnel cost plan of the elevator in sequence through enumeration method, and uses the elevator maintenance scheduling algorithm to calculate and formulate the optimal maintenance scheduling plan of the elevator, and sends the maintenance task to the mobile APP terminal of the corresponding maintenance personnel through the Internet;

[0025] S7. The mobile APP terminal prompts the corresponding maintenance personnel in the form of a pop-up window, so that they know the content of the maintenance task, the estimated completion time, and execute the maintenance task;

[0026] S8. When the maintenance personnel complete the maintenance task, they will first confirm it on the APP and upload the confirmation information to the APS server through the APP. Then, the APS server will send an electronic customer return form to the customer. The customer will fill in the return content on the APP and confirm it, and finally upload it to the APS server for archiving.

[0027] Further, in step S3, the fault information is a custom string ALARM-ABTE, wherein ALARM represents the fault information header byte, A represents the specific address number of the elevator, B represents the brand number of the elevator, T represents the model number of the elevator, and E represents the fault code of the elevator.

[0028] Further, in step S4, the query command is a custom string GET-ABT-ALL, wherein GET represents a request to obtain the information header byte, A represents the specific address number of the elevator, B represents the brand number of the elevator, T represents the model number of the elevator, and ALL represents all information of the elevator;

[0029] The response information is a custom string ECHO-ABT-M1-M2-M3-N, where ECHO represents the response information header byte, A represents the specific address number of the elevator, B represents the brand number of the elevator, T represents the model number of the elevator, M1 represents the safety circuit status, M2 represents the hall door lock circuit status, M3 represents the car door lock circuit status, and N represents the number of brakes.

[0030] Furthermore, in step S5, the brake shoe wear empirical formula is as follows:

[0031] d=kN×F m ×V n

[0032] Among them, k is the correction coefficient; N is the number of brake engagements; F is the average braking load, in kg; V is the average braking speed, in m / s; m is the empirical index of the average braking load, generally between 0.3-0.6; n is the empirical index of the average braking speed, generally between 0.2-0.4; d is the wear thickness of the brake shoe, in mm.

[0033] Furthermore, in step S6, the maintenance man-hour model formula is as follows:

[0034]

[0035] Where T represents the total man-hours of the maintenance project; x i represents the maintenance difficulty coefficient of the ith sub-project. The difficulty coefficient of routine maintenance is 1, the difficulty coefficient of general failure is 1.1-1.2, and the difficulty coefficient of major failure is 1.2-1.5; t irepresents the theoretical maintenance time of the ith sub-project; i Indicates the skill level of the maintenance personnel involved in the ith sub-project. The coefficient of junior workers is 0.7-0.9, the coefficient of intermediate workers is 0.9-1.1, and the coefficient of senior workers is 1.1-1.5; δ i Represents the correction coefficient of the i-th sub-item, i=1...n.

[0036] Furthermore, in step S6, the maintenance personnel cost model formula is as follows:

[0037]

[0038] Among them, Q represents the total cost of the maintenance project; T represents the total man-hours of the maintenance project; q represents the average labor cost per hour; λ i represents the skill level of the maintenance personnel involved in the ith sub-project. The coefficient of junior workers is 0.7-0.9, the coefficient of intermediate workers is 0.9-1.1, and the coefficient of senior workers is 1.1-1.5; γ i Represents the correction coefficient of the i-th sub-item, i=1...n.

[0039] Furthermore, the minimum maintenance personnel cost plan is to search the maintenance personnel database in the APS server for a list of maintenance personnel who are idle and meet the qualification requirements, and use the enumeration method to substitute the maintenance personnel skill levels corresponding to the personnel in the list into the maintenance personnel cost model formula in turn, solve the minimum cost plan and determine the maintenance personnel.

[0040] Furthermore, the process of obtaining the optimal elevator maintenance scheduling plan by the elevator maintenance scheduling algorithm is as follows:

[0041] L1. Create a work calendar in the APS server and set the working hours to 9:00-17:00 on weekdays;

[0042] L2. Average the maintenance difficulty coefficient of each maintenance item of the elevator to obtain the average maintenance difficulty coefficient of each maintenance item; wherein each maintenance item contains several sub-items, and averaging the maintenance difficulty coefficient of each maintenance item means calculating the arithmetic mean of the sum of the maintenance difficulty coefficients of all sub-items contained in each maintenance item;

[0043] L3. If the average maintenance difficulty coefficient of a maintenance project is greater than 1, it means that the maintenance project contains a fault repair sub-project. Among all the projects whose average maintenance difficulty coefficient is greater than 1 that have not been implemented, they should be re-arranged in descending order according to the difficulty coefficient and inserted from the front of the work calendar. At the same time, ensure that the time interval between the start of the previous and next projects of the same maintenance personnel is greater than or equal to the maintenance time of the previous project to ensure that the project is completed on schedule;

[0044] L4. If the average maintenance difficulty coefficient of a maintenance project is equal to 1, it means that all of them are routine maintenance sub-projects. Among all the projects whose average maintenance difficulty coefficient is equal to 1 that have not been implemented, they are re-arranged in order according to the deadline of the maintenance project. The start time of the project is determined by subtracting the maintenance duration from the deadline of the last project in the work calendar, and the project is inserted into the work calendar from the back to the front.

[0045] L5. If the aforementioned maintenance items have been completed and the subsequent maintenance items have not yet started, the start time of the subsequent maintenance items that have not yet started can be dynamically advanced.

[0046] The APS system for elevator maintenance and the use method thereof provided by the present invention have the following beneficial effects compared with the prior art:

[0047] (1) The fault monitoring module remotely collects elevator operation status and monitors fault information, abandoning the traditional elevator scheduled maintenance and on-site fault diagnosis methods;

[0048] (2) The brake shoe wear empirical formula, elevator maintenance man-hour model formula, and maintenance personnel cost model formula were constructed. The minimum elevator maintenance personnel cost plan can be calculated based on the elevator maintenance man-hour model formula and the maintenance personnel cost model formula, thereby determining the maintenance personnel corresponding to the minimum maintenance cost;

[0049] (3) Adopt advanced elevator maintenance scheduling algorithm to establish the optimal elevator maintenance scheduling plan by setting the work calendar, maintenance duration, and calculating the average maintenance difficulty coefficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0051] Figure 1 This is a structural diagram of an APS system for elevator maintenance of the present invention;

[0052] Figure 2 It is a structural diagram of the fault monitoring module of the present invention;

[0053] Figure 3 The present invention is a flowchart of a method for using the APS system for elevator maintenance. DETAILED DESCRIPTION

[0054] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0055] Embodiment 1: Figure 1-Figure 2 As shown, an APS system for elevator maintenance provided by an embodiment of the present invention includes a fault monitoring module, an APS server and a mobile phone APP terminal; wherein:

[0056] The fault monitoring module is connected to the APS server through the 4G / 5G network to collect information about the elevator's brand, model, location, elevator safety circuit status, hall door lock circuit status, car door lock circuit status, and brake times, which are then transmitted to the APS server through the 4G / 5G network by the fault monitoring module;

[0057] The APS server is connected to the mobile APP terminal through the 4G / 5G network to receive real-time information from the fault monitoring module. According to the elevator maintenance requirements provided by the elevator manufacturer, the technical level of the maintenance company's maintenance personnel, the maintenance working hours, and the maintenance information content, the brake shoe wear experience formula, the maintenance working hour model formula, and the maintenance personnel cost model formula are substituted. The minimum maintenance personnel cost plan and the optimal maintenance scheduling plan are calculated in sequence through the enumeration method, and the maintenance tasks are sent to the mobile APP terminal through the Internet;

[0058] The mobile APP terminal receives the work order task plan from the APS server through the 4G / 5G network, uses the APP pop-up window to remind the corresponding maintenance personnel to complete the corresponding work and submit the electronic customer return form.

[0059] This system uses a fault monitoring module, an APS server and a mobile APP terminal to implement an APS system for elevator maintenance. The system remotely collects elevator operating status and monitors fault information through the fault monitoring module, uses the brake shoe wear empirical formula, the elevator maintenance working hour model formula and the maintenance personnel cost model formula to determine the elevator's minimum maintenance personnel cost plan, and uses advanced elevator maintenance scheduling algorithms to establish the optimal elevator maintenance scheduling plan, thereby maximizing elevator maintenance efficiency. Through design, simulation and verification, a modular product is formed, which can achieve rapid transplantation between different platforms and accelerate the product development process.

[0060] Specifically, in the first embodiment, the fault monitoring module includes a safety circuit current sensor, a hall door lock circuit current sensor, a car door lock circuit current sensor, a brake coil current sensor, a keyboard, a display, an MCU controller and a 4G / 5G module; wherein:

[0061] The safety circuit current sensor is connected to the AD port of the MCU controller to collect the current value of the elevator safety circuit and send the signal to the MCU controller via the AD port at 4-20mA;

[0062] The hall door lock circuit current sensor is connected to the MCU controller AD port to collect the current value of the elevator hall door lock circuit and send the signal to the MCU controller via the AD port at 4-20mA;

[0063] The car door lock circuit current sensor is connected to the MCU controller AD port to collect the current value of the elevator car door lock circuit and send the signal to the MCU controller via the AD port at 4-20mA;

[0064] The brake coil current sensor is connected to the AD port of the MCU controller to collect the current value of the elevator brake coil and send the signal to the MCU controller via the AD port at 4-20mA;

[0065] The keyboard is connected to the I / O port of the MCU controller to input the brand, model, and location information of the elevator, and send the signal to the MCU controller through the I / O port;

[0066] The display is connected to the IIC port of the MCU controller to receive the brand, model, location, safety circuit status, hall door lock circuit status, car door lock circuit status and brake times information sent by the IIC port protocol of the MCU controller, and complete the display;

[0067] The MCU controller is connected to the 4G / 5G module through a TTL serial port to receive query commands, collect the elevator safety circuit current, hall door lock circuit current and car door lock circuit current, and compare them with the preset current threshold range to determine the status of the safety circuit, hall door lock circuit and car door lock circuit, as well as calculate the number of brake times and determine the brake status through the number of changes in the brake coil current, which are then sent out by the 4G / 5G module.

[0068] Specifically, in the first embodiment, the 4G / 5G module is implemented by Hezhou Air780E full network access, the MCU controller hardware adopts STM32F103C8T6, and the KeiluVision 5 software C language is used for compilation.

[0069] The APS system for elevator maintenance in the first embodiment adopts a fault monitoring module, an APS server and a mobile phone APP terminal to realize an APS system for elevator maintenance. The system remotely collects the elevator operation status and monitors the fault information through the fault monitoring module, uses the brake shoe wear empirical formula, the elevator maintenance working hour model formula and the maintenance personnel cost model formula to determine the elevator minimum maintenance personnel cost plan, and uses the elevator maintenance scheduling algorithm to establish the optimal elevator maintenance scheduling plan, thereby maximizing the elevator maintenance efficiency; through design, simulation and verification, a modular product is formed, which can realize rapid transplantation between different platforms and accelerate the product development process.

[0070] Embodiment 2: Figure 3 As shown, an embodiment of the present invention provides a method for using an APS system for elevator maintenance, which adopts the APS system for elevator maintenance as described in Example 1, and specifically includes the following steps:

[0071] S1. Power on the elevator power supply system and input the elevator brand number, model number, location number, average braking load and average braking speed through the fault monitoring module keyboard;

[0072] S2, collect the elevator safety circuit current, hall door lock circuit current, car door lock circuit current and brake times information through the fault monitoring module, and compare the collected information with the corresponding threshold interval preset in the fault monitoring module to determine whether the elevator has a fault;

[0073] S3. When the elevator fails, the fault monitoring module directly sends the fault information to the APS server;

[0074] S4. When the elevator has no faults, the APS server periodically sends a query command to the fault monitoring module. After receiving the query command, the fault monitoring module sends a response message and uploads the elevator brand, model, elevator safety circuit status, hall door lock circuit status, car door lock circuit status and brake times to the APS server;

[0075] S5. After the APS server receives the information sent by the fault monitoring module, it automatically determines the content of the regular maintenance operation of the elevator based on the empirical formula of brake shoe wear and the working time of the elevator;

[0076] S6. The APS server uses the maintenance time model formula and the maintenance personnel cost model formula according to the technical level of the maintenance personnel, the maintenance working hours and the maintenance information content, and calculates the lowest maintenance personnel cost plan of the elevator in sequence through enumeration method, and uses the elevator maintenance scheduling algorithm to calculate and formulate the optimal maintenance scheduling plan of the elevator, and sends the maintenance task to the mobile APP terminal of the corresponding maintenance personnel through the Internet;

[0077] S7. The mobile APP terminal prompts the corresponding maintenance personnel in the form of a pop-up window, so that they know the content of the maintenance task, the estimated completion time, and execute the maintenance task;

[0078] S8. When the maintenance personnel complete the maintenance task, they will first confirm it on the APP and upload the confirmation information to the APS server through the APP. Then, the APS server will send an electronic customer return form to the customer. The customer will fill in the return content on the APP and confirm it, and finally upload it to the APS server for archiving.

[0079] Specifically, in the second embodiment, the fault information is a custom string ALARM-ABTE, wherein ALARM represents the fault information header byte, A represents the specific address number of the elevator, B represents the brand number of the elevator, T represents the model number of the elevator, and E represents the fault code of the elevator.

[0080] Specifically, in the second embodiment, the query command is a custom string GET-ABT-ALL, wherein GET represents a request to obtain the information header byte, A represents the specific address number of the elevator, B represents the brand number of the elevator, T represents the model number of the elevator, and ALL represents all information of the elevator.

[0081] Specifically, in the second embodiment, the response information is a custom string ECHO-ABT-M1-M2-M3-N, where ECHO represents the response information header byte, A represents the specific address number of the elevator, B represents the brand number of the elevator, T represents the model number of the elevator, M1 represents the safety circuit status, M2 represents the hall door lock circuit status, M3 represents the car door lock circuit status, and N represents the number of brake times.

[0082] Specifically, in the second embodiment, the brake shoe wear empirical formula is as follows:

[0083] d=kN×F m ×V n

[0084] Among them, k is the correction coefficient; N is the number of brake engagements; F is the average braking load, in kg; V is the average braking speed, in m / s; m is the empirical index of the average braking load, generally between 0.3-0.6; n is the empirical index of the average braking speed, generally between 0.2-0.4; d is the wear thickness of the brake shoe, in mm.

[0085] Specifically, in the second embodiment, the maintenance man-hour model formula is as follows:

[0086]

[0087] Where T represents the total man-hours of the maintenance project; xi represents the maintenance difficulty coefficient of the ith sub-project. The difficulty coefficient of routine maintenance is 1, the difficulty coefficient of general failure is 1.1-1.2, and the difficulty coefficient of major failure is 1.2-1.5; t i represents the theoretical maintenance time of the ith sub-project; i Indicates the skill level of the maintenance personnel involved in the ith sub-project. The coefficient of junior workers is 0.7-0.9, the coefficient of intermediate workers is 0.9-1.1, and the coefficient of senior workers is 1.1-1.5; δ i Represents the correction coefficient of the i-th sub-item, i=1...n.

[0088] Specifically, in the second embodiment, the maintenance personnel cost model formula is as follows:

[0089]

[0090] Among them, Q represents the total cost of the maintenance project; T represents the total man-hours of the maintenance project; q represents the average labor cost per hour; λ i represents the skill level of the maintenance personnel involved in the ith sub-project. The coefficient of junior workers is 0.7-0.9, the coefficient of intermediate workers is 0.9-1.1, and the coefficient of senior workers is 1.1-1.5; γ i Represents the correction coefficient of the i-th sub-item, i=1...n.

[0091] Specifically, in the second embodiment, the lowest maintenance personnel cost plan is to search the maintenance personnel database in the APS server for a list of maintenance personnel who are idle and meet the qualification requirements, and use the enumeration method to substitute the maintenance personnel skill levels corresponding to the personnel in the list into the maintenance working hour model formula and the maintenance personnel cost model formula in turn to solve the lowest cost plan and determine the maintenance personnel.

[0092] Specifically, in the second embodiment, the process of the elevator maintenance scheduling algorithm obtaining the optimal elevator maintenance scheduling plan is as follows:

[0093] L1. Create a work calendar in the APS server and set the working hours to 9:00-17:00 on weekdays;

[0094] L2. Average the maintenance difficulty coefficient of each maintenance item of the elevator to obtain the average maintenance difficulty coefficient of each maintenance item; wherein each maintenance item contains several sub-items, and averaging the maintenance difficulty coefficient of each maintenance item means calculating the arithmetic mean of the sum of the maintenance difficulty coefficients of all sub-items contained in each maintenance item;

[0095] L3. If the average maintenance difficulty coefficient of a maintenance project is greater than 1, it means that the maintenance project contains a fault repair sub-project. Among all the projects whose average maintenance difficulty coefficient is greater than 1 that have not been implemented, they should be re-arranged in descending order according to the difficulty coefficient and inserted from the front of the work calendar. At the same time, ensure that the time interval between the start of the previous and next projects of the same maintenance personnel is greater than or equal to the maintenance time of the previous project to ensure that the project is completed on schedule;

[0096] L4. If the average maintenance difficulty coefficient of a maintenance project is equal to 1, it means that all of them are routine maintenance sub-projects. Among all the projects whose average maintenance difficulty coefficient is equal to 1 that have not been implemented, they are re-arranged in order according to the deadline of the maintenance project. The start time of the project is determined by subtracting the maintenance duration from the deadline of the last project in the work calendar, and the project is inserted into the work calendar from the back to the front.

[0097] L5. If the aforementioned maintenance items have been completed and the subsequent maintenance items have not yet started, the start time of the subsequent maintenance items that have not yet started can be dynamically advanced.

[0098] Through the above method, the optimal elevator maintenance scheduling plan can be obtained.

[0099] like Figure 3 As shown, after the elevator power supply system is powered on, the brand number, model number, position number, average braking load and average braking speed of the elevator are input, and the elevator safety circuit current, hall door lock circuit current, car door lock circuit current and brake number information are collected to determine the fault state. According to the empirical formula for brake shoe wear and the elevator working hours, the content of regular maintenance work is determined, and the maintenance man-hour model formula and the maintenance personnel cost model formula are used to obtain the lowest maintenance personnel cost plan. The elevator maintenance scheduling algorithm is used to establish the optimal elevator maintenance scheduling plan, thereby maximizing the elevator maintenance efficiency.

[0100] The method for using the APS system for elevator maintenance in the second embodiment is completed using standard C language, adopts a modular design method, and uses a fault monitoring module, an APS server and a mobile phone APP terminal to implement an APS system for elevator maintenance. The fault monitoring module remotely collects the elevator operation status and monitors the fault information, uses the brake shoe wear empirical formula, the elevator maintenance working hour model formula and the maintenance personnel cost model formula to determine the lowest cost plan, and uses the elevator maintenance scheduling algorithm to establish the optimal elevator maintenance scheduling plan, thereby maximizing the elevator maintenance efficiency.

[0101] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An APS system for elevator maintenance, mainly including: Fault monitoring module, APS server and mobile APP terminal; The fault monitoring module is connected to the APS server via a 4G / 5G network to collect information on the brand, model, location, elevator safety circuit status, hall door lock circuit status, car door lock circuit status, and brake times of the elevator, and the fault monitoring module transmits the information to the APS server via the 4G / 5G network; The APS server is connected to the mobile phone APP terminal through a 4G / 5G network to receive real-time information from the fault monitoring module. According to the elevator maintenance requirements provided by the elevator manufacturer, the technical level of the maintenance personnel of the maintenance company, the maintenance working hours, and the maintenance information content, the brake shoe wear experience formula, the maintenance working hour model formula, and the maintenance personnel cost model formula are substituted. The minimum maintenance personnel cost plan and the optimal maintenance scheduling plan for the elevator are calculated in sequence by enumeration method, and the maintenance tasks are sent to the mobile phone APP terminal through the Internet; The mobile phone APP terminal receives the work order task plan of the APS server through the 4G / 5G network, uses the APP pop-up window to remind the corresponding maintenance personnel to complete the corresponding work, and submit the electronic customer return form.

2. The APS system for elevator maintenance according to claim 1, characterized in that: The fault monitoring module includes a safety circuit current sensor, a hall door lock circuit current sensor, a car door lock circuit current sensor, a brake coil current sensor, a keyboard, a display, an MCU controller and a 4G / 5G module; The safety loop current sensor is connected to the AD port of the MCU controller, and is used to collect the current value of the elevator safety loop, and send the signal to the MCU controller via the AD port at 4-20mA; The hall door lock loop current sensor is connected to the AD port of the MCU controller, and is used to collect the current value of the elevator hall door lock loop, and send the signal to the MCU controller via the AD port at 4-20mA; The car door lock loop current sensor is connected to the AD port of the MCU controller, and is used to collect the current value of the elevator car door lock loop, and send the signal to the MCU controller via the AD port at 4-20mA; The brake coil current sensor is connected to the AD port of the MCU controller, and is used to collect the current value of the elevator brake coil, and send the signal to the MCU controller via the AD port at 4-20mA; The keyboard is connected to the I / O port of the MCU controller, and is used to input the brand, model, and location information of the elevator, and send the signal to the MCU controller via the I / O port; The display is connected to the IIC port of the MCU controller, and is used to receive the brand, model, location, safety circuit status, hall door lock circuit status, car door lock circuit status and brake number information sent by the IIC port protocol of the MCU controller, and complete the display; The MCU controller is connected to the 4G / 5G module through a TTL serial port, and is used to receive query commands, collect the elevator safety circuit current, hall door lock circuit current and car door lock circuit current, and compare them with the preset current threshold range to determine the status of the safety circuit, hall door lock circuit and car door lock circuit, as well as calculate the number of brake times and determine the brake status through the number of changes in the brake coil current, which are issued by the 4G / 5G module.

3. A method for using the APS system for elevator maintenance as claimed in claim 1, characterized in that: The steps include: S1. Power on the elevator power supply system and input the elevator brand number, model number, location number, average braking load and average braking speed through the fault monitoring module keyboard; S2, collect the elevator safety circuit current, hall door lock circuit current, car door lock circuit current and brake times information through the fault monitoring module, and compare the collected information with the corresponding threshold interval preset in the fault monitoring module to determine whether the elevator has a fault; S3. When the elevator fails, the fault monitoring module directly sends the fault information to the APS server; S4. When the elevator has no faults, the APS server periodically sends a query command to the fault monitoring module. After receiving the query command, the fault monitoring module sends a response message and uploads the elevator brand, model, elevator safety circuit status, hall door lock circuit status, car door lock circuit status and brake times to the APS server; S5. After the APS server receives the information sent by the fault monitoring module, it automatically determines the content of the regular maintenance operation of the elevator based on the empirical formula of brake shoe wear and the working time of the elevator; S6. The APS server uses the maintenance time model formula and the maintenance personnel cost model formula according to the technical level of the maintenance personnel, the maintenance working hours and the maintenance information content, and calculates the lowest maintenance personnel cost plan of the elevator in sequence through enumeration method, and uses the elevator maintenance scheduling algorithm to calculate and formulate the optimal maintenance scheduling plan of the elevator, and sends the maintenance task to the mobile APP terminal of the corresponding maintenance personnel through the Internet; S7. The mobile APP terminal prompts the corresponding maintenance personnel in the form of a pop-up window, so that they know the content of the maintenance task, the estimated completion time, and execute the maintenance task; S8. When the maintenance personnel complete the maintenance task, they will first confirm it on the APP and upload the confirmation information to the APS server through the APP. Then, the APS server will send an electronic customer return form to the customer. The customer will fill in the return content on the APP and confirm it, and finally upload it to the APS server for archiving.

4. The method for using the APS system for elevator maintenance as claimed in claim 3, characterized in that: In step S3, the fault information is a custom string ALARM-ABTE, wherein ALARM represents the fault information header byte, A represents the specific address number of the elevator, B represents the brand number of the elevator, T represents the model number of the elevator, and E represents the fault code of the elevator.

5. The method for using the APS system for elevator maintenance as claimed in claim 3, characterized in that: In step S4, the query command is a custom string GET-ABT-ALL, wherein GET indicates a request to obtain the information header byte, A indicates the specific address number of the elevator, B indicates the brand number of the elevator, T indicates the model number of the elevator, and ALL indicates all information of the elevator; The response information is a custom string ECHO-ABT-M1-M2-M3-N, where ECHO represents the response information header byte, A represents the specific address number of the elevator, B represents the brand number of the elevator, T represents the model number of the elevator, M1 represents the safety circuit status, M2 represents the hall door lock circuit status, M3 represents the car door lock circuit status, and N represents the number of brakes.

6. The method for using the APS system for elevator maintenance as claimed in claim 3, characterized in that: In step S5, the brake shoe wear empirical formula is as follows: d=kN×F m ×V n Among them, k is the correction coefficient; N is the number of brake engagements; F is the average braking load, in kg; V is the average braking speed, in m / s; m is the empirical index of the average braking load, generally between 0.3-0.6; n is the empirical index of the average braking speed, generally between 0.2-0.4; d is the wear thickness of the brake shoe, in mm.

7. The method for using the APS system for elevator maintenance as claimed in claim 3, characterized in that: In step S6, the maintenance time model formula is as follows: Where T represents the total man-hours of the maintenance project; x i represents the maintenance difficulty coefficient of the ith sub-project. The difficulty coefficient of routine maintenance is 1, the difficulty coefficient of general failure is 1.1-1.2, and the difficulty coefficient of major failure is 1.2-1.5; t i represents the theoretical maintenance time of the i-th sub-project; i Indicates the skill level of the maintenance personnel involved in the ith sub-project. The coefficient of junior workers is 0.7-0.9, the coefficient of intermediate workers is 0.9-1.1, and the coefficient of senior workers is 1.1-1.5; δ i Represents the correction coefficient of the i-th sub-item, i=1...n.

8. The method for using the APS system for elevator maintenance as claimed in claim 3, characterized in that: In step S6, the maintenance personnel cost model formula is as follows: Among them, Q represents the total cost of the maintenance project; T represents the total man-hours of the maintenance project; q represents the average labor cost per hour; λ i represents the skill level of the maintenance personnel involved in the ith sub-project. The coefficient of junior workers is 0.7-0.9, the coefficient of intermediate workers is 0.9-1.1, and the coefficient of senior workers is 1.1-1.5; γ i Represents the correction coefficient of the i-th sub-item, i=1...n.

9. The method for using the APS system for elevator maintenance as claimed in claim 3, characterized in that: The minimum maintenance personnel cost plan is to search the maintenance personnel database in the APS server for a list of maintenance personnel who are idle and meet the qualification requirements, and use the enumeration method to substitute the maintenance personnel skill levels corresponding to the personnel in the list into the maintenance personnel cost model formula in turn, solve the minimum cost plan and determine the maintenance personnel.

10. The method for using the APS system for elevator maintenance according to claim 3, characterized in that: In step S6, the process of obtaining the optimal elevator maintenance scheduling plan by the elevator maintenance scheduling algorithm is as follows: L1. Create a work calendar in the APS server and set the working hours to 9:00-17:00 on weekdays; L2. Average the maintenance difficulty coefficient of each maintenance item of the elevator to obtain the average maintenance difficulty coefficient of each maintenance item; wherein each maintenance item contains several sub-items, and averaging the maintenance difficulty coefficient of each maintenance item means calculating the arithmetic mean of the sum of the maintenance difficulty coefficients of all sub-items contained in each maintenance item; L3. If the average maintenance difficulty coefficient of a maintenance project is greater than 1, it means that the maintenance project contains a fault repair sub-project. Among all the projects whose average maintenance difficulty coefficient is greater than 1 that have not been implemented, they should be re-arranged in descending order according to the difficulty coefficient and inserted from the front of the work calendar. At the same time, ensure that the time interval between the start of the previous and next projects of the same maintenance personnel is greater than or equal to the maintenance time of the previous project to ensure that the project is completed on schedule; L4. If the average maintenance difficulty coefficient of a maintenance project is equal to 1, it means that all of them are routine maintenance sub-projects. Among all the projects whose average maintenance difficulty coefficient is equal to 1 that have not been implemented, they are re-arranged in order according to the deadline of the maintenance project. The start time of the project is determined by subtracting the maintenance duration from the deadline of the last project in the work calendar, and the project is inserted into the work calendar from the back to the front. L5. If the aforementioned maintenance items have been completed and the subsequent maintenance items have not yet started, the start time of the subsequent maintenance items that have not yet started can be dynamically advanced.

Images