A method, system, device and storage medium for early warning of elevator door lock failure

Abstract

This invention discloses an elevator door lock fault early warning method, system, device, and storage medium. When the elevator door is closed, the method collects the terminal electrical signal of the door lock circuit. The terminal electrical signal is either terminal voltage or terminal current. Based on the terminal electrical signals collected at multiple acquisition times, the method calculates the rate of change of the terminal electrical signal and determines whether the rate of change is greater than a preset rate. If the rate of change is greater than the preset rate, a door lock fault early warning signal is issued. By observing the rate of change of the terminal electrical signal, the method provides early warning of faults in the door lock contacts caused by oxidation, sulfidation, dust accumulation, wear, etc., enabling door lock maintenance and improving the stability and transportation efficiency of the elevator operation.

Description

Technical Field

[0001] This invention relates to elevator fault early warning technology, and more particularly to an elevator door lock fault early warning method, system, device and storage medium. Background Technology

[0002] Each landing door and car door of an elevator should be equipped with an electrical safety device to verify that the landing and car doors are closed. This electrical safety device is usually called a landing door lock or car door lock, and is collectively referred to as a door lock. The elevator must not be started when the doors are not closed.

[0003] In actual use, because elevators have multiple landing doors and one or more car doors, and each door has several locks, these locks are generally connected in series to form a circuit. If any lock is disconnected, the detection device can detect that the lock circuit has been broken, thus preventing the elevator from starting.

[0004] Because the door lock contacts operate frequently, and the elevator shaft environment can sometimes be quite harsh, coupled with improper mechanical installation and adjustment of some doors, door lock malfunctions can easily occur, causing the elevator to become inoperable. Summary of the Invention

[0005] This invention provides an elevator door lock fault early warning method, system, device, and storage medium to improve the stability of elevator operation and transportation efficiency.

[0006] In a first aspect, the present invention provides an elevator door lock malfunction early warning method, comprising:

[0007] When the elevator door closes, the terminal electrical signal of the door lock circuit is collected, and the terminal electrical signal is the terminal voltage or the terminal current;

[0008] The rate of change of the terminal electrical signal is calculated based on the terminal electrical signal collected at multiple acquisition times.

[0009] Determine whether the rate of change is greater than a preset rate;

[0010] When the rate of change exceeds a preset rate, a door lock malfunction warning signal is issued.

[0011] Optionally, based on the terminal electrical signals acquired at multiple acquisition times, the rate of change of the terminal electrical signals is calculated, including:

[0012] The terminal electrical signals collected daily are processed to calculate the characteristic values ​​of the terminal electrical signals collected daily, including but not limited to the average value, maximum value, and median.

[0013] Calculate the difference between the characteristic value of the current day's end electrical signal and the characteristic value of the end electrical signal of the day before the preset day;

[0014] The rate of change of the terminal electrical signal is obtained by calculating the quotient of the difference and the preset number of days.

[0015] Optionally, elevator door lock malfunction warning methods also include:

[0016] Collect the voltage at the beginning of the door lock circuit;

[0017] Determine whether the voltage at the beginning of the circuit is less than the first threshold.

[0018] If so, it is determined that there is a power supply fault in the door lock circuit, and a fault warning is issued;

[0019] If not, then determine whether the end electrical signal is greater than the second threshold and less than the third threshold. The second threshold is the end electrical signal when the door lock is open, and the third threshold is less than the door lock open signal trigger voltage of the door lock opening and closing identification load.

[0020] If so, a door lock malfunction warning signal will be issued.

[0021] Optionally, elevator door lock malfunction warning methods also include:

[0022] During the elevator door closing process, the first time taken for the terminal electrical signal to change from the fourth threshold to the fifth threshold and stabilize is collected;

[0023] Determine whether the first duration is greater than the first preset duration;

[0024] If so, a door lock malfunction warning signal will be issued.

[0025] Optionally, elevator door lock malfunction warning methods also include:

[0026] During the elevator door opening process, the second time taken for the terminal electrical signal to change from the fifth threshold to the fourth threshold and stabilize is collected;

[0027] Determine whether the second duration is greater than the second preset duration;

[0028] If so, a door lock malfunction warning signal will be issued.

[0029] Optionally, elevator door lock malfunction warning methods also include:

[0030] Calculate the rate of change of the first duration based on the first duration corresponding to multiple elevator door closings, or calculate the rate of change of the second duration based on the second duration corresponding to multiple elevator door openings.

[0031] Determine whether the rate of change of the first duration is greater than the first rate threshold, or whether the rate of change of the second duration is greater than the second rate threshold;

[0032] If the rate of change of the first duration is greater than the first rate threshold, or the rate of change of the second duration is greater than the second rate threshold, a door lock malfunction warning signal will be issued.

[0033] Secondly, the present invention also provides an elevator door lock malfunction early warning system, comprising:

[0034] Door lock circuit power supply, used to supply power to the door lock circuit;

[0035] Multiple door locks are connected in series with the door lock circuit power supply to form a door lock circuit;

[0036] The door lock opening and closing recognition load is connected in series at the end of the door lock circuit;

[0037] The controller is connected to the beginning and end of the door lock circuit and the door lock opening / closing identification load, respectively, and is used to execute the elevator door lock fault early warning method provided in the first aspect of the present invention.

[0038] Optionally, the elevator door lock fault warning system further includes a first anti-current backflow device and a second anti-current backflow device. The input terminal of the first anti-current backflow device is connected to the power supply of the door lock circuit, and the output terminal of the first anti-current backflow device is connected to the controller. The input terminal of the second anti-current backflow device is connected to the end of the door lock circuit, and the output terminal of the second anti-current backflow device is connected to the controller.

[0039] Thirdly, the present invention also provides an electronic device, comprising:

[0040] One or more processors;

[0041] Storage device for storing one or more programs;

[0042] When the one or more programs are executed by the one or more processors, the one or more processors implement the elevator door lock fault early warning method as provided in the first aspect of the present invention.

[0043] Fourthly, the present invention also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the elevator door lock fault warning method as provided in the first aspect of the present invention.

[0044] The elevator door lock fault early warning method provided by this invention collects the end electrical signal of the door lock circuit when the elevator door is closed. The end electrical signal is the end voltage or end current. Based on the end electrical signal collected at multiple collection times, the rate of change of the end electrical signal is calculated, and it is determined whether the rate of change is greater than a preset rate. When the rate of change is greater than the preset rate, a door lock fault early warning signal is issued. By using the rate of change of the end electrical signal, fault warnings are given in advance for door lock contacts caused by oxidation, sulfidation, dust accumulation, wear, etc., so as to maintain the door lock and improve the stability of elevator operation and transportation efficiency.

[0045] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0046] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0047] Figure 1 A flowchart of an elevator door lock fault early warning method provided by the present invention;

[0048] Figure 2 A flowchart of another elevator door lock fault early warning method provided by the present invention;

[0049] Figure 3 This is a schematic diagram of the structure of an elevator door lock fault early warning system provided by the present invention;

[0050] Figure 4 This is a schematic diagram of the structure of an elevator door lock fault early warning device provided by the present invention;

[0051] Figure 5 This is a schematic diagram of the structure of an electronic device provided by the present invention.

[0052] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0053] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0054] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0055] Figure 1 This is a flowchart of an elevator door lock fault early warning method provided by the present invention. This embodiment can be applied to extracting and warning of elevator door lock faults. The method can be executed by the elevator door lock fault detection device provided in this embodiment of the invention. This device can be implemented by software and / or hardware, and is usually configured in electronic devices, such as... Figure 1 As shown, the elevator door lock malfunction early warning method includes the following steps:

[0056] S101. When the elevator door is closed, collect the end electrical signal of the door lock circuit. The end electrical signal is the end voltage or the end current.

[0057] In this embodiment of the invention, the terminal electrical signal of the door lock circuit is collected when the elevator door closes. The terminal electrical signal is either the terminal voltage or the terminal current. In this embodiment of the invention, multiple door locks are connected in series to form a door lock circuit. The terminal of the door lock circuit refers to the end of the last door lock furthest from the power source of the door lock circuit, in the direction of current flow.

[0058] For example, the terminal voltage Vn of the door lock circuit is collected when the elevator door is closed. Since the elevator can still operate normally at this time, the collected terminal voltage Vn is greater than the door lock open / close recognition load's door lock disconnect signal trigger voltage Vload. The door lock open / close recognition load is connected in series at the end of the door lock circuit. When the elevator door is closed and the terminal voltage is greater than or equal to the door lock disconnect signal trigger voltage Vload, the door lock open / close recognition load determines that the door lock circuit is closed and sends a door lock closed signal; when the elevator door is closed, but the terminal voltage is less than the door lock disconnect signal trigger voltage Vload, the door lock open / close recognition load determines that the door lock circuit is open and sends a door lock disconnect signal. Specifically, the door lock disconnect signal trigger voltage Vload of the door lock open / close recognition load can be obtained through pre-learning.

[0059] In other embodiments of the present invention, electrical signals can be collected separately from the end of each lock furthest from the power supply of the lock circuit, and fault warnings can be issued for that lock based on these electrical signals. This will not be elaborated further in the embodiments of the present invention. However, the need to collect and process electrical signals separately from the end of each lock furthest from the power supply of the lock circuit results in higher costs.

[0060] S102. Calculate the rate of change of the terminal electrical signal based on the terminal electrical signal collected at multiple acquisition times.

[0061] In this embodiment of the invention, the rate of change of the terminal electrical signal is calculated based on the terminal electrical signal collected at multiple acquisition times.

[0062] For example, this invention is described using the terminal electrical signal as a terminal voltage. The case where the terminal electrical signal is a terminal current is similar to the case where the terminal electrical signal is a terminal voltage, and will not be described again here.

[0063] In this embodiment of the invention, the terminal voltage collected daily is processed to calculate the characteristic values ​​of the terminal electrical signal collected daily. These characteristic values ​​include, but are not limited to, the average, maximum, and median, and are not limited thereto in this embodiment. For example, in this embodiment, the average value is used as the characteristic value. Specifically, this average value is used as the terminal voltage for the current day. The difference between the average value of the terminal electrical signal for the current day and the average value of the terminal electrical signal for the day prior to the preset date is calculated. The quotient of this difference and the preset date is then calculated to obtain the rate of change of the terminal electrical signal.

[0064] Specifically, each time the elevator door closes, the terminal voltage Vn of the door lock circuit is collected, and the collected data is processed by filtering and other data processing. The collected terminal voltage Vn is sorted according to the time sequence of collection, and its rate of change (increase) is calculated.

[0065] For example, in some embodiments of the present invention, after each elevator door closes, an end voltage Vn is recorded. The arithmetic average of all the end voltages Vn collected each day is calculated to obtain Vni (where Vni represents the average value of Vn collected after several door closes on day i). Starting from the 8th day of the collection, the difference between day i (the current day) and day i+7 is calculated, i.e., ΔVn1=Vn8-Vn1, ΔVn2=Vn9-Vn2, ..., ΔVni=Vni+7-Vni, and the rate of change of the end voltage is Vi=ΔVni / 7.

[0066] S103. Determine whether the rate of change is greater than the preset rate.

[0067] Elevator door lock contacts experience increased resistance due to various factors, including: arc erosion leading to chemical changes (combination of carbon and oxygen from the air with silver and copper elements in the contacts, as well as impurities from dust on the contact surface); dust accumulation (due to the high dust levels in the shaft and the airflow from the car); and contact wear (linear wear caused by mechanical friction during contact and separation; pitting wear caused by arc erosion; and reduction in metal thickness due to plating vaporization caused by arc erosion). When this resistance increases to a certain level, the voltage across the door lock's opening / closing recognition load becomes lower than the voltage Vload required to detect door closure after the door lock circuit closes. Consequently, the elevator control system interprets the door as not closed after it is closed. When the rate of change of the terminal electrical signal exceeds a preset rate, it indicates an impending door lock malfunction, triggering a door lock malfunction warning signal.

[0068] In this embodiment of the invention, based on the terminal voltage Vn collected at multiple acquisition times, the rate of change (increase) of the terminal voltage Vn is calculated, and it is determined whether the current rate of change is greater than the preset rate. If so, it indicates that the door lock in the door lock circuit is about to malfunction, and a door lock malfunction warning signal is issued.

[0069] S104. When the rate of change is greater than the preset rate, issue a door lock malfunction warning signal.

[0070] For example, if the rate of change (increase) of the terminal voltage Vn is greater than the preset rate, it indicates that the door lock in the door lock circuit is about to malfunction, and a door lock malfunction warning signal is issued.

[0071] The elevator door lock fault early warning method provided by this invention collects the end electrical signal of the door lock circuit when the elevator door is closed. The end electrical signal is the end voltage or end current. Based on the end electrical signal collected at multiple collection times, the rate of change of the end electrical signal is calculated, and it is determined whether the rate of change is greater than a preset rate. When the rate of change is greater than the preset rate, a door lock fault early warning signal is issued. By using the rate of change of the end electrical signal, fault warnings are given in advance for door lock contacts caused by oxidation, sulfidation, dust accumulation, wear, etc., so as to maintain the door lock and improve the stability of elevator operation and transportation efficiency.

[0072] In some embodiments of the present invention, the elevator door lock fault early warning method further includes:

[0073] 1. Collect the voltage at the beginning of the door lock circuit.

[0074] In this embodiment of the invention, the voltage V0 at the beginning of the door lock circuit is collected. In this embodiment of the invention, multiple door locks are connected in series to form a door lock circuit. The beginning of the door lock circuit refers to the end of the first door lock closest to the power supply of the door lock circuit, in the direction of current. In other embodiments of the invention, the voltage V0 at the beginning can also be the output voltage of the door lock circuit power supply.

[0075] 2. Determine whether the voltage at the first end is less than the first threshold.

[0076] In this embodiment of the invention, it is determined whether the first-end voltage V0 is less than the first threshold V0c, where the first threshold V0c is used to represent the boundary voltage of the output voltage fault of the door lock circuit power supply.

[0077] 3. If so, it is determined that there is a power supply fault in the door lock circuit, and a fault warning is issued.

[0078] If the initial voltage V0 is less than the first threshold V0c, it is determined that there is a power supply fault in the door lock circuit, and a fault reminder is issued to indicate that the power supply of the door lock circuit has failed.

[0079] 4. If not, determine whether the end electrical signal is greater than the second threshold and less than the third threshold. The second threshold is the end electrical signal when the door lock is disconnected, and the third threshold is less than the door lock disconnection signal trigger voltage of the door lock opening and closing recognition load.

[0080] If the initial voltage V0 is not less than the first threshold V0c, then it is further determined whether the final voltage is greater than the second threshold Vop and less than the third threshold Vnc. The second threshold Vop is the final voltage when the door lock is open, and the third threshold Vnc is less than the door lock open signal trigger voltage Vload of the door lock opening and closing identification load.

[0081] 5. If so, a door lock malfunction warning signal will be issued.

[0082] If the terminal voltage is greater than the second threshold Vop and less than the third threshold Vnc, it indicates that the contact resistance has increased due to oxidation, sulfidation, dust accumulation, wear, etc., and a fault is about to occur. In this case, a door lock fault warning signal will be issued.

[0083] During elevator operation, door locks may malfunction due to inherent defects or improper installation. This can cause the door lock to be subjected to forces (magnitude, angle, etc.) exceeding design limits, leading to mechanical deformation and ultimately preventing the contacts from closing. Consequently, the elevator control system interprets the door as not closed even after it has been closed. Examples include: contact displacement (due to installation or product defects, the contact point may shift during closing); contact deformation (due to installation or product defects, the contact point may deform during closing); contact breakage (due to installation or product defects, the contact point may break during closing); and contact seat breakage (due to installation or product defects, the contact seat may break during closing).

[0084] To address this type of fault, the present invention provides an elevator door lock fault early warning method. Figure 2 A flowchart of another elevator door lock fault early warning method provided by the present invention is shown below. Figure 2 As shown, elevator door lock malfunction early warning methods include:

[0085] S201. During the elevator door closing process, the first time taken for the terminal electrical signal to change from the fourth threshold to the fifth threshold and stabilize is collected.

[0086] In this embodiment of the invention, during each elevator door closing process, the first time Tmclose is taken for the terminal voltage to change from the fourth threshold Vnopen' to the fifth threshold Vnclose' and stabilize.

[0087] Where Vnclose' = Vnopen + c*(Vnclose - Vnopen);

[0088] Vnopen'=Vnclose-c*(Vnclose-Vnopen).

[0089] When the door lock circuit is open, the terminal voltage is Vnopen. Specifically, when Vn < Vload and the duration exceeds Topen, the terminal voltage at this time is recorded as Vopen. When the door lock circuit is closed, the terminal voltage is Vclose. Specifically, when Vn > Vload and the duration exceeds Tclose, the terminal voltage at this time is recorded as Vclose. c is a constant and 0 < c < 1, and m is the current floor of the car. Stability means that after Vn enters the corresponding voltage state (Vn > Vnclose'), it maintains that voltage state for the durations Tclose and Topen.

[0090] S202. Determine whether the first duration is greater than the first preset duration.

[0091] In this embodiment of the invention, it is determined whether the first duration Tmclose is greater than the first preset duration Tclosec, where Tclosec is a constant and Tclosec < Tclose.

[0092] S203. When the first duration exceeds the first preset duration, a door lock malfunction warning signal is issued.

[0093] When the first duration Tmclose is greater than the first preset duration Tclosec, it indicates that there is a problem with the door lock itself or improper installation, or that the door lock has undergone mechanical deformation, resulting in an extended closing time. This may indicate that a door lock malfunction is about to occur, so a door lock malfunction warning signal is issued.

[0094] In some embodiments of the present invention, the elevator door lock fault early warning method can also determine whether there is a fault caused by a faulty door lock itself or a faulty door lock installation based on the duration of the change in the end electrical signal during the elevator door opening process. Specifically, the elevator door lock fault early warning method includes:

[0095] 1. During the elevator door opening process, the second time taken for the terminal electrical signal to change from the fifth threshold to the fourth threshold and stabilize.

[0096] In this embodiment of the invention, during each elevator door opening process, the second time Tmopen is collected to measure the change in the terminal voltage from the fifth threshold Vnclose' to the fourth threshold Vnopen' and the time it takes to stabilize.

[0097] 2. Determine whether the second duration is greater than the second preset duration.

[0098] In this embodiment of the invention, it is determined whether the first duration Tmopen is greater than the second preset duration Topenc, where Topenc is a constant and Topenc < Topen.

[0099] 3. If so, a door lock malfunction warning signal will be issued.

[0100] When the second duration Tmopen is greater than the second preset duration Topenc, it indicates that there is a problem with the door lock itself or improper installation, or that the door lock has undergone mechanical deformation, resulting in an extended opening time. This may indicate that a door lock malfunction is about to occur, so a door lock malfunction warning signal is issued.

[0101] In some embodiments of the present invention, the elevator door lock fault early warning method further includes:

[0102] 1. Calculate the rate of change of the first duration based on the first duration corresponding to multiple elevator door closings, or calculate the rate of change of the second duration based on the second duration corresponding to multiple elevator door openings.

[0103] In this embodiment of the invention, the rate of change of the first duration Tmclose is calculated based on the first duration Tmclose corresponding to multiple elevator door closings, or the rate of change of the second duration Tmopen is calculated based on the second duration Tmopen corresponding to multiple elevator door openings.

[0104] For example, the first duration Tmclose and the second duration Tmopen are filtered and sorted according to the time sequence of acquisition. Then, the change rate of the first duration Tmclose and the second duration Tmopen is calculated. Specifically, the calculation method of the change rate can refer to the calculation method of the change rate of the terminal voltage in the previous embodiment. The present invention will not be described again here.

[0105] 2. Determine whether the rate of change of the first duration is greater than the first rate threshold, or whether the rate of change of the second duration is greater than the second rate threshold.

[0106] In this embodiment of the invention, it is determined whether the rate of change of the first duration is greater than a first rate threshold, or whether the rate of change of the second duration is greater than a second rate threshold.

[0107] 3. If the rate of change of the first duration is greater than the first rate threshold, or the rate of change of the second duration is greater than the second rate threshold, a door lock malfunction warning signal will be issued.

[0108] If the rate of change of the first duration is greater than the first rate threshold, or the rate of change of the second duration is greater than the second rate threshold, it indicates that the door lock itself is faulty or the door lock is not installed properly, or that the door lock has undergone mechanical deformation, resulting in a prolonged door opening time. This may indicate that a door lock malfunction is about to occur, and therefore a door lock malfunction warning signal is issued.

[0109] Figure 3 This is a schematic diagram of the structure of an elevator door lock fault early warning system provided by the present invention, as shown below. Figure 3 As shown, the elevator door lock malfunction early warning system includes:

[0110] The door lock circuit power supply is used to power the door lock circuit.

[0111] Multiple door locks S are connected in series with the door lock circuit power supply to form a door lock circuit;

[0112] The door lock opening and closing recognition load is connected in series at the end of the door lock circuit and is used to determine the continuity of the door lock circuit.

[0113] The controller MCU is connected to the first end, the last end, and the door lock opening / closing identification load of the door lock circuit, and is used to execute the elevator door lock fault early warning method provided in any of the foregoing embodiments of the present invention.

[0114] In some embodiments of the present invention, the elevator door lock fault early warning system further includes a first anti-current backflow device and a second anti-current backflow device. The input terminal of the first anti-current backflow device is connected to the door lock circuit power supply (Power), and the output terminal of the first anti-current backflow device is connected to the controller (MCU). The input terminal of the second anti-current backflow device is connected to the end of the door lock circuit, and the output terminal of the second anti-current backflow device is connected to the controller (MCU). The controller (MCU) collects the voltage at the beginning of the circuit through the first anti-current backflow device and the voltage at the end of the circuit through the second anti-current backflow device. Furthermore, the first anti-current backflow device can prevent current from flowing back to the beginning of the door lock circuit, and the second anti-current backflow device can prevent current from flowing back to the door lock opening / closing identification load (Load).

[0115] For example, in some embodiments of the present invention, the first anti-current backflow device includes a first diode D1, and the second anti-current backflow device includes a second diode D2. The anode of the first diode D1 is connected to the door lock circuit power supply Power, and the cathode of the first diode D1 is connected to the controller MCU. The anode of the second diode D2 is connected to the end of the door lock circuit, and the cathode of the second diode D2 is connected to the controller MCU.

[0116] Figure 4 This is a schematic diagram of the structure of an elevator door lock fault early warning device provided by the present invention, as shown below. Figure 4 As shown, the elevator door lock malfunction early warning device includes:

[0117] The end signal acquisition module 201 is used to acquire the end electrical signal of the door lock circuit when the elevator door is closed. The end electrical signal is the end voltage or the end current.

[0118] The signal rate calculation module 202 is used to calculate the rate of change of the terminal electrical signal based on the terminal electrical signal collected at multiple acquisition times.

[0119] The first judgment module 203 is used to determine whether the rate of change is greater than a preset rate;

[0120] The first early warning module 204 is used to issue a door lock malfunction early warning signal when the rate of change is greater than a preset rate.

[0121] In some embodiments of the present invention, the signal rate calculation module 202 includes:

[0122] The data processing submodule is used to process the terminal electrical signals collected daily and calculate the characteristic values ​​of the terminal electrical signals collected daily, including the average value, the maximum value, and the median.

[0123] The difference calculation submodule is used to calculate the difference between the characteristic value of the current day's end electrical signal and the characteristic value of the end electrical signal of the day before the preset day;

[0124] The rate calculation submodule is used to calculate the quotient of the difference and the preset number of days to obtain the rate of change of the terminal electrical signal.

[0125] In some embodiments of the present invention, the elevator door lock malfunction early warning device further includes:

[0126] The first-end voltage acquisition module is used to acquire the first-end voltage of the door lock circuit;

[0127] The second judgment module is used to determine whether the voltage at the first end is less than the first threshold.

[0128] The power supply fault detection module is used to determine that there is a power supply fault in the door lock circuit when the voltage at the first end is less than a first threshold, and to issue a fault warning.

[0129] The third judgment module is used to determine whether the end electrical signal is greater than the second threshold and less than the third threshold when the first end voltage is not less than the first threshold. The second threshold is the end electrical signal when the door lock is disconnected, and the third threshold is less than the door lock disconnection signal trigger voltage of the door lock opening and closing identification load.

[0130] The second early warning module is used to issue a door lock malfunction early warning signal when the terminal electrical signal is greater than the second threshold and less than the third threshold.

[0131] In some embodiments of the present invention, the elevator door lock malfunction early warning device further includes:

[0132] The first duration acquisition module is used to acquire the first duration taken for the end electrical signal to change from the fourth threshold to the fifth threshold and stabilize during the elevator door closing process.

[0133] The fourth judgment module is used to determine whether the first duration is greater than the first preset duration;

[0134] The third early warning module is used to issue a door lock malfunction early warning signal when the first duration exceeds the first preset duration.

[0135] In some embodiments of the present invention, the elevator door lock malfunction early warning device further includes:

[0136] The second duration acquisition module is used to acquire the second duration during the elevator door opening process, which is the time it takes for the terminal electrical signal to change from the fifth threshold to the fourth threshold and stabilize.

[0137] The fifth judgment module is used to determine whether the second duration is greater than the second preset duration;

[0138] The fourth early warning module is used to issue a door lock malfunction early warning signal when the second duration exceeds the second preset duration.

[0139] In some embodiments of the present invention, the elevator door lock malfunction early warning device further includes:

[0140] The duration rate calculation module is used to calculate the rate of change of the first duration based on the first duration corresponding to multiple elevator door closings, or to calculate the rate of change of the second duration based on the second duration corresponding to multiple elevator door openings.

[0141] The sixth judgment module is used to determine whether the rate of change of the first duration is greater than the first rate threshold, or whether the rate of change of the second duration is greater than the second rate threshold.

[0142] The fifth early warning module is used to issue a door lock malfunction early warning signal when the rate of change for the first duration is greater than the first rate threshold, or the rate of change for the second duration is greater than the second rate threshold.

[0143] The aforementioned elevator door lock fault warning device can execute the elevator door lock fault warning method provided in the foregoing embodiments of the present invention, and has the corresponding functional modules and beneficial effects of executing the elevator door lock fault warning method.

[0144] Figure 5 This is a schematic diagram of an electronic device provided by the present invention. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processors, cellular phones, smartphones, wearable devices (such as helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely illustrative and are not intended to limit the implementation of the invention described and / or claimed herein.

[0145] like Figure 5As shown, the electronic device includes at least one processor 11 and a memory, such as a read-only memory (ROM) 12 or a random access memory (RAM) 13, communicatively connected to the at least one processor 11. The memory stores computer programs executable by the at least one processor. The processor 11 can perform various appropriate actions and processes based on the computer program stored in the ROM 12 or loaded into the RAM 13 from storage unit 18. The RAM 13 can also store various programs and data required for the operation of the electronic device. The processor 11, ROM 12, and RAM 13 are interconnected via a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0146] Multiple components in the electronic device are connected to the I / O interface 15, including: an input unit 16, such as a keyboard, mouse, etc.; an output unit 17, such as various types of displays, speakers, etc.; a storage unit 18, such as a disk, optical disk, etc.; and a communication unit 19, such as a network card, modem, wireless transceiver, etc. The communication unit 19 allows the electronic device to exchange information / data with other devices through computer networks such as the Internet and / or various telecommunications networks.

[0147] Processor 11 can be a variety of general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special-purpose artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any suitable processor, controller, microcontroller, etc. Processor 11 performs the various methods and processes described above, such as an elevator door lock fault warning method.

[0148] In some embodiments, the elevator door lock malfunction warning method may be implemented as a computer program tangibly contained in a computer-readable storage medium, such as storage unit 18. In some embodiments, part or all of the computer program may be loaded into and / or installed on an electronic device via ROM 12 and / or communication unit 19. When the computer program is loaded into RAM 13 and executed by processor 11, one or more steps of the elevator door lock malfunction warning method described above may be performed. Alternatively, in other embodiments, processor 11 may be configured to perform the elevator door lock malfunction warning method by any other suitable means (e.g., by means of firmware).

[0149] Various embodiments of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field-programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), application-specific standard products (ASSPs), systems-on-a-chip (SoCs), payload-programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments may include implementations in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which may be a dedicated or general-purpose programmable processor, capable of receiving data and instructions from a storage system, at least one input device, and at least one output device, and transmitting data and instructions to the storage system, the at least one input device, and the at least one output device.

[0150] Computer programs used to implement the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, such that when executed by the processor, the computer programs cause the functions / operations specified in the flowcharts and / or block diagrams to be performed. The computer programs may be executed entirely on a machine, partially on a machine, or as a standalone software package, partially on a machine and partially on a remote machine, or entirely on a remote machine or server.

[0151] In the context of this invention, a computer-readable storage medium can be a tangible medium that may contain or store a computer program for use by or in conjunction with an instruction execution system, apparatus, or device. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination thereof. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. More specific examples of machine-readable storage media include electrical connections based on one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof.

[0152] To provide interaction with a user, the systems and techniques described herein can be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and pointing device (e.g., a mouse or trackball) through which the user provides input to the electronic device. Other types of devices can also be used to provide interaction with the user; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including sound input, voice input, or tactile input).

[0153] The systems and technologies described herein can be implemented in computing systems that include backend components (e.g., as data servers), or computing systems that include middleware components (e.g., application servers), or computing systems that include frontend components (e.g., user computers with graphical user interfaces or web browsers through which users can interact with implementations of the systems and technologies described herein), or any combination of such backend, middleware, or frontend components. The components of the system can be interconnected via digital data communication of any form or medium (e.g., communication networks). Examples of communication networks include local area networks (LANs), wide area networks (WANs), blockchain networks, and the Internet.

[0154] A computing system can include clients and servers. Clients and servers are generally located far apart and typically interact through communication networks. The client-server relationship is created by computer programs running on the respective computers and having a client-server relationship with each other. The server can be a cloud server, also known as a cloud computing server or cloud host, which is a hosting product within the cloud computing service system to address the shortcomings of traditional physical hosts and VPS services, such as high management difficulty and weak business scalability.

[0155] This invention also provides a computer program product, including a computer program that, when executed by a processor, implements the elevator door lock fault early warning method provided in any embodiment of this application.

[0156] In implementing the computer program product, computer program code for performing the operations of this invention can be written in one or more programming languages ​​or a combination thereof. Programming languages ​​include object-oriented programming languages ​​such as Java, Smalltalk, and C++, as well as conventional procedural programming languages ​​such as C or similar languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network—including a local area network (LAN) or a wide area network (WAN)—or can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0157] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0158] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A method for early warning of elevator door lock malfunctions, characterized in that, include: When the elevator door closes, the terminal electrical signal of the door lock circuit is collected, and the terminal electrical signal is the terminal voltage or the terminal current; The rate of change of the terminal electrical signal is calculated based on the terminal electrical signal collected at multiple acquisition times. Determine whether the rate of change is greater than a preset rate; When the rate of change exceeds a preset rate, a door lock malfunction warning signal is issued; Based on the terminal electrical signals acquired at multiple acquisition times, the rate of change of the terminal electrical signals is calculated, including: The terminal electrical signals collected daily are processed to calculate the characteristic values ​​of the terminal electrical signals collected daily, including but not limited to the average value, maximum value, and median. Calculate the difference between the characteristic value of the current day's end electrical signal and the characteristic value of the end electrical signal of the day before the preset day; The rate of change of the terminal electrical signal is obtained by calculating the quotient of the difference and the preset number of days.

2. The elevator door lock fault early warning method according to claim 1, characterized in that, Also includes: Collect the voltage at the beginning of the door lock circuit; Determine whether the voltage at the beginning of the circuit is less than the first threshold. If so, it is determined that there is a power supply fault in the door lock circuit, and a fault warning is issued; If not, then determine whether the end electrical signal is greater than the second threshold and less than the third threshold. The second threshold is the end electrical signal when the door lock is open, and the third threshold is less than the door lock open signal trigger voltage of the door lock opening and closing identification load. If so, a door lock malfunction warning signal will be issued.

3. The elevator door lock fault early warning method according to claim 1, characterized in that, Also includes: During the elevator door closing process, the first time taken for the terminal electrical signal to change from the fourth threshold to the fifth threshold and stabilize is collected; Determine whether the first duration is greater than the first preset duration; If so, a door lock malfunction warning signal will be issued.

4. The elevator door lock fault early warning method according to claim 3, characterized in that, Also includes: During the elevator door opening process, the second time taken for the terminal electrical signal to change from the fifth threshold to the fourth threshold and stabilize is collected; Determine whether the second duration is greater than the second preset duration; If so, a door lock malfunction warning signal will be issued.

5. The elevator door lock fault early warning method according to claim 4, characterized in that, Also includes: Calculate the rate of change of the first duration based on the first duration corresponding to multiple elevator door closings, or calculate the rate of change of the second duration based on the second duration corresponding to multiple elevator door openings. Determine whether the rate of change of the first duration is greater than the first rate threshold, or whether the rate of change of the second duration is greater than the second rate threshold; If the rate of change of the first duration is greater than the first rate threshold, or the rate of change of the second duration is greater than the second rate threshold, a door lock malfunction warning signal will be issued.

6. An elevator door lock malfunction early warning system, characterized in that, include: Door lock circuit power supply, used to supply power to the door lock circuit; Multiple door locks are connected in series with the door lock circuit power supply to form a door lock circuit; The door lock opening and closing recognition load is connected in series at the end of the door lock circuit; The controller is connected to the first end, the last end of the door lock circuit and the door lock opening / closing identification load, respectively, and is used to execute the elevator door lock fault early warning method as described in any one of claims 1-5.

7. The elevator door lock fault early warning system according to claim 6, characterized in that, It also includes a first anti-current backflow device and a second anti-current backflow device. The input terminal of the first anti-current backflow device is connected to the power supply of the door lock circuit, and the output terminal of the first anti-current backflow device is connected to the controller. The input terminal of the second anti-current backflow device is connected to the end of the door lock circuit, and the output terminal of the second anti-current backflow device is connected to the controller.

8. An electronic device, characterized in that, include: One or more processors; Storage device for storing one or more programs; When the one or more programs are executed by the one or more processors, the one or more processors implement the elevator door lock fault early warning method as described in any one of claims 1-5.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the program is executed by the processor, it implements the elevator door lock fault early warning method as described in any one of claims 1-5.

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