Elevator door lock fault early warning method, system and equipment and storage medium

Abstract

The invention discloses an elevator door lock fault early warning method, system and device and a storage medium, tail end electric signals of a door lock loop are collected when an elevator door is closed, the tail end electric signals are tail end voltage or tail end current, and the change rate of the tail end electric signals is calculated based on the tail end electric signals collected at multiple collection moments; whether the change rate is larger than a preset rate or not is judged, when the change rate is larger than the preset rate, a door lock fault early warning signal is sent, and fault early warning is conducted on faults, caused by oxidation, vulcanization, dust accumulation, abrasion and the like, of a door lock contact in advance according to the change rate of the tail end electric signal, so that the door lock is maintained; and the running stability and the transportation efficiency of the elevator are improved.

Description

Technical Field

[0001] The present invention relates to elevator fault warning technology, and in particular to an elevator door lock fault warning method, system, equipment and storage medium. Background Art

[0002] Each floor door and car door of the elevator should be equipped with an electrical safety device to verify the closure of the floor door and car door. The electrical safety device is usually called a floor door lock, a car door lock, or a door lock. When the door is not closed, the elevator is not allowed to start.

[0003] In actual use, since the elevator has multiple floor doors, one or more car doors, and each door has several door locks, generally these door locks are connected in series to form a loop. As long as one door lock is cut off, the detection device can detect that the door lock circuit is cut off, thereby prohibiting the elevator from starting.

[0004] Since the door lock contacts frequently operate, the elevator shaft environment is sometimes harsh, and some door mechanical installations are not properly adjusted, it is easy to cause door lock failures, which can cause the elevator to be unable to operate. Summary of the invention

[0005] The present 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 fault warning method, comprising:

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

[0008] Calculating the rate of change of the terminal electrical signal based on the terminal electrical signal collected at multiple collection moments;

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

[0010] When the rate of change is greater than a preset rate, a door lock failure warning signal is issued.

[0011] Optionally, calculating the rate of change of the terminal electrical signal based on the terminal electrical signal collected at multiple collection moments includes:

[0012] Performing data processing on the terminal electrical signals collected every day, and calculating characteristic values ​​of the terminal electrical signals collected every day, wherein the characteristic values ​​include but are not limited to the average value, the maximum value, and the median;

[0013] Calculate the difference between the characteristic value of the electric signal at the end of the current day and the characteristic value of the electric signal at the end of the day before the preset day;

[0014] The quotient of the difference and the preset day is calculated to obtain the rate of change of the terminal electrical signal.

[0015] Optionally, the elevator door lock failure warning method also includes:

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

[0017] Determining whether the first-end voltage is less than a first threshold;

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

[0019] If not, determine whether the terminal electrical signal is greater than a second threshold and less than a third threshold, the second threshold being the terminal electrical signal when the door lock is disconnected, and the third threshold being less than the door lock disconnection signal trigger voltage of the door lock open / close identification load;

[0020] If so, a door lock failure warning signal is issued.

[0021] Optionally, the elevator door lock failure warning method also includes:

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

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

[0024] If so, a door lock failure warning signal is issued.

[0025] Optionally, the elevator door lock failure warning method also includes:

[0026] During the process of the elevator door opening, collecting the second time duration for the terminal electrical signal to change from the fifth threshold value to the fourth threshold value and stabilize;

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

[0028] If so, a door lock failure warning signal is issued.

[0029] Optionally, the elevator door lock failure warning method also includes:

[0030] Based on the first duration corresponding to multiple elevator door closings, the change rate of the first duration is calculated, or based on the second duration corresponding to multiple elevator door openings, the change rate of the second duration is calculated;

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

[0032] If the change rate of the first time length is greater than the first rate threshold, or the change rate of the second time length is greater than the second rate threshold, a door lock failure warning signal is issued.

[0033] In a second aspect, the present invention further provides an elevator door lock failure warning system, comprising:

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

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

[0036] A door lock open / close identification load, which is connected in series at the end of the door lock circuit;

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

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

[0039] In a third aspect, the present invention further provides an electronic device, comprising:

[0040] one or more processors;

[0041] A 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 failure warning method provided in the first aspect of the present invention.

[0043] In a fourth aspect, the present invention further 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 provided in the first aspect of the present invention.

[0044] The elevator door lock fault warning method provided by the present invention collects the terminal electrical signal of the door lock circuit when the elevator door is closed, the terminal electrical signal is the terminal voltage or the terminal current, and based on the terminal electrical signals collected at multiple collection moments, calculates the change rate of the terminal electrical signal, and determines whether the change rate is greater than the preset rate. When the change rate is greater than the preset rate, a door lock fault warning signal is issued. Through the change rate of the terminal electrical signal, a fault warning is issued in advance for the door lock contact caused by oxidation, sulfidation, dust accumulation, wear and the like, so as to maintain the door lock, thereby improving the stability of the elevator operation and the transportation efficiency.

[0045] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. 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 creative work.

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

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

[0049] Figure 3 A schematic diagram of the structure of an elevator door lock failure warning system provided by the present invention;

[0050] Figure 4 A schematic diagram of the structure of an elevator door lock failure warning device provided by the present invention;

[0051] Figure 5 The present invention provides a schematic structural diagram of an electronic device.

[0052] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0053] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings 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 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 and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

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

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

[0057] In the embodiment of the present invention, the terminal electrical signal of the door lock circuit is collected when the elevator door is closed, and the terminal electrical signal is the terminal voltage or the terminal current. In the embodiment of the present invention, multiple door locks are connected in series to form a door lock circuit, and the end of the door lock circuit refers to the end of the last door lock away from the door lock circuit power supply according to the current direction.

[0058] Exemplarily, the terminal voltage Vn of the door lock circuit is collected when the elevator door is closed. Since the elevator can still work normally at this time, the collected terminal voltage Vn is greater than the door lock disconnect signal trigger voltage Vload of the door lock opening and closing identification load. The door lock opening and closing identification load is connected in series to 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 opening and closing identification load determines that the door lock circuit is closed and sends a door lock closing 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 opening and closing identification load determines that the door lock circuit is disconnected and sends a door lock disconnect signal. Specifically, the door lock disconnect signal trigger voltage Vload of the door lock opening and closing identification load can be obtained by pre-learning.

[0059] In other embodiments of the present invention, electrical signals may be collected from one end of each door lock away from the door lock circuit power supply, and fault warning may be issued to the door lock based on the electrical signals. The embodiments of the present invention will not be described in detail here. However, since the electrical signals need to be collected and processed from one end of each door lock away from the door lock circuit power supply, the cost is relatively high.

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

[0061] In the embodiment of the present invention, the rate of change of the terminal electrical signal is calculated based on the terminal electrical signal collected at multiple collection moments.

[0062] Exemplarily, the present invention is described by taking the case where the terminal electrical signal is a terminal voltage as an example. 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 the present invention will not be described in detail herein.

[0063] In an embodiment of the present invention, data processing is performed on the terminal voltage collected every day, and characteristic values ​​of the terminal electrical signals collected every day are calculated. The characteristic values ​​include but are not limited to the average value, the maximum value, and the median, which are not limited in the embodiment of the present invention. Exemplarily, in an embodiment of the present invention, the average value is used as the characteristic value for illustration. Specifically, the average value is used as the terminal voltage of the day, and the difference between the average value of the terminal electrical signal of the current day and the average value of the terminal electrical signal of the day before the preset day is calculated, and the quotient of the difference and the preset day is calculated to obtain the rate of change of the terminal electrical signal.

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

[0065] Exemplarily, in some embodiments of the present invention, each time the elevator door closes, a terminal voltage Vn is recorded, and all the terminal voltages Vn collected are arithmetic averaged every day to obtain Vni (where Vni represents the average value of Vn collected after several door closings on the i-th day); and starting from the 8th day from the beginning of collection, the difference between the i-th day (the current day) and the i+7th day is calculated, that is, ΔVn1=Vn8-Vn1, ΔVn2=Vn9-Vn2,..., ΔVni=Vni+7-Vni, and the rate of change of the terminal voltage is Vi=ΔVni / 7.

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

[0067] The contact of the elevator door lock is eroded by the electric arc, resulting in chemical changes (carbon and oxygen elements in the air combine with silver and copper elements of the contact, and there are also miscellaneous components of dust on the surface of the contact), dust accumulation on the contact (there is a lot of dust in the well, and the airflow brought by the operation of the car easily causes dust to accumulate on the contact surface), contact wear (linear wear: mechanical friction of the contact during contact and separation causes wear; pit wear: pits caused by the electric arc; reduction in contact metal thickness: plating vaporization caused by the electric arc) and other reasons will cause the contact resistance to increase. When the contact resistance increases to a certain extent, after the door lock circuit is closed, the voltage divided by the door lock opening and closing identification load is less than the voltage Vload that the door lock opening and closing identification load can detect the door lock closing, resulting in the elevator control system judging that the door is not closed after the door is closed. When the rate of change of the terminal electrical signal is greater than the preset rate, it means that the door lock in the door lock circuit is about to fail, and a door lock failure warning signal is issued.

[0068] In an embodiment of the present invention, based on the terminal voltage Vn collected at multiple collection moments, the change (increase) rate of the terminal voltage Vn is calculated, and it is determined whether the current change rate is greater than the preset rate. If so, it means that the door lock in the door lock circuit is about to fail, and a door lock failure warning signal is issued.

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

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

[0071] The elevator door lock fault warning method provided by the present invention collects the terminal electrical signal of the door lock circuit when the elevator door is closed, the terminal electrical signal is the terminal voltage or the terminal current, and based on the terminal electrical signals collected at multiple collection moments, calculates the change rate of the terminal electrical signal, and determines whether the change rate is greater than the preset rate. When the change rate is greater than the preset rate, a door lock fault warning signal is issued. Through the change rate of the terminal electrical signal, a fault warning is issued in advance for the door lock contact caused by oxidation, sulfidation, dust accumulation, wear and the like, so as to maintain the door lock, thereby improving the stability of the elevator operation and the transportation efficiency.

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

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

[0074] In the embodiment of the present invention, the voltage V0 at the head end of the door lock circuit is collected. In the embodiment of the present invention, a plurality of door locks are connected in series to form a door lock circuit. The head end of the door lock circuit refers to the end of the first door lock close to the door lock circuit power supply according to the current direction. In other embodiments of the present invention, the voltage V0 at the head end may also be the output voltage of the door lock circuit power supply.

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

[0076] In the embodiment of the present invention, it is determined whether the first-end voltage V0 is less than a first threshold value V0c. The first threshold value V0c is used to indicate a boundary voltage of an output voltage failure of the door lock loop power supply.

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

[0078] If the first-end voltage V0 is less than the first threshold V0c, it is determined that the power supply of the door lock circuit is faulty, and a fault reminder is issued to remind that the power supply of the door lock circuit is faulty.

[0079] 4. If not, determine whether the terminal electrical signal is greater than the second threshold and less than the third threshold. The second threshold is the terminal 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 open and close identification load.

[0080] If the head-end voltage V0 is not less than the first threshold V0c, then continue to judge whether the terminal voltage is greater than the second threshold Vop and less than the third threshold Vnc. The second threshold Vop is the terminal voltage when the door lock is disconnected, and the third threshold Vnc is less than the door lock disconnection signal trigger voltage Vload of the door lock opening and closing identification load.

[0081] 5. If yes, a door lock failure warning signal is issued.

[0082] If the terminal voltage is greater than the second threshold Vop and less than the third threshold Vnc, it means that the contact resistance increases due to oxidation, sulfidation, dust accumulation, wear and tear, and a fault is about to occur, and a door lock fault warning signal is issued.

[0083] During the operation of the elevator, the door lock may also be defective or poorly installed, resulting in the force mode (size, angle, etc.) of the door lock exceeding the design range during use, causing the door lock to undergo mechanical deformation, and ultimately the contacts cannot be closed, so that after the door is closed, the elevator control system determines that the door is not closed. For example, contact displacement: the contact is impacted when the door is closed due to poor installation or product, causing the contact position to change; contact deformation: the contact is impacted when the door is closed due to poor installation or product, causing the contact to deform; contact breakage: the contact is impacted when the door is closed due to poor installation or product, causing the contact to break; contact seat breakage: the contact seat is impacted when the door is closed due to poor installation or product, causing the contact seat to break, etc.

[0084] In response to 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 warning method provided by the present invention is shown in FIG. Figure 2 As shown, the elevator door lock failure warning method includes:

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

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

[0087] Wherein, 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 floor where the current car is located. Stability means that when Vn enters the corresponding voltage state (Vn>Vnclose'), it maintains this voltage state during the duration of Tclose and Topen.

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

[0091] In the embodiment of the present invention, it is determined whether the first time length Tmclose is greater than the first preset time length Tclosec, wherein Tclosec is a constant and Tclosec<Tclose.

[0092] S203: When the first time duration is greater than a first preset time duration, a door lock failure warning signal is issued.

[0093] When the first time length Tmclose is greater than the first preset time length Tclosec, it indicates that the door lock itself is defective or the door lock is poorly installed, and the door lock undergoes mechanical deformation, resulting in a prolonged door closing time. A door lock failure may occur, and therefore a door lock failure warning signal is issued.

[0094] In some embodiments of the present invention, the elevator door lock fault warning method can also determine whether there is a fault caused by a defective door lock itself or a poor installation of the door lock according to the change duration of the terminal electrical signal during the elevator door opening process. Specifically, the elevator door lock fault warning method includes:

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

[0096] In the embodiment of the present invention, in each elevator door opening process, the second time period Tmopen taken for the terminal voltage to change from the fifth threshold value Vnclose' to the fourth threshold value Vnopen' and stabilize is collected.

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

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

[0099] 3. If yes, a door lock failure warning signal is issued.

[0100] When the second time length Tmopen is greater than the second preset time length Topenc, it indicates that the door lock itself is defective or the door lock is poorly installed, the door lock undergoes mechanical deformation, resulting in prolonged door opening time, and a door lock failure may occur, so a door lock failure warning signal is issued.

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

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

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

[0104] Exemplarily, the collected first time length Tmclose and the second time length Tmopen are subjected to data filtering processing and are sorted in the order of collection time, and then the change rates of the first time length Tmclose and the second time length Tmopen are calculated. Specifically, the method for calculating the change rate can refer to the method for calculating the change rate of the terminal voltage in the aforementioned embodiment, and the embodiments of the present invention will not be repeated here.

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

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

[0107] 3. If the rate of change of the first time length is greater than the first rate threshold, or the rate of change of the second time length is greater than the second rate threshold, a door lock failure warning signal is issued.

[0108] If the change rate of the first time duration is greater than the first rate threshold, or the change rate of the second time duration is greater than the second rate threshold, the door lock itself is defective or the door lock is poorly installed, the door lock undergoes mechanical deformation, resulting in prolonged door opening time, and a door lock failure may occur, so a door lock failure warning signal is issued.

[0109] Figure 3 A schematic diagram of the structure of an elevator door lock fault warning system provided by the present invention is shown in FIG. Figure 3 As shown, the elevator door lock failure warning system includes:

[0110] Door lock circuit power supply Power, used to power the door lock circuit;

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

[0112] The door lock open and close identification load Load is connected in series at the end of the door lock circuit to determine whether the door lock circuit is on or off;

[0113] The controller MCU is connected to the head end, the end end and the door lock opening and closing identification load of the door lock circuit respectively, and is used to execute the elevator door lock fault warning method provided by any of the aforementioned embodiments of the present invention.

[0114] In some embodiments of the present invention, the elevator door lock fault warning system also includes a first anti-current backflow device and a second anti-current backflow device, the input end of the first anti-current backflow device is connected to the door lock circuit power supply Power, the output end of the first anti-current backflow device is connected to the controller MCU, the input end of the second anti-current backflow device is connected to the end of the door lock circuit, and the output end of the second anti-current backflow device is connected to the controller MCU. The controller MCU collects the head end voltage through the first anti-current backflow device and collects the terminal voltage through the second anti-current backflow device. In addition, the first anti-current backflow device can also prevent the current from being backflowed to the head end of the door lock circuit, and the second anti-current backflow device can also prevent the current from being backflowed to the door lock opening and closing identification load Load.

[0115] Exemplarily, 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, 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 A schematic diagram of the structure of an elevator door lock fault warning device provided by the present invention is shown in FIG. Figure 4 As shown, the elevator door lock failure warning device includes:

[0117] The terminal signal acquisition module 201 is used to collect the terminal electrical signal of the door lock circuit when the elevator door is closed, and the terminal electrical signal is the terminal voltage or the terminal current;

[0118] A signal rate calculation module 202, used to calculate the rate of change of the terminal electrical signal based on the terminal electrical signal collected at multiple collection moments;

[0119] A first judging module 203, used to judge whether the change rate is greater than a preset rate;

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

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

[0122] A data processing submodule is used to process the terminal electrical signals collected every day and calculate the characteristic values ​​of the terminal electrical signals collected every day, wherein the characteristic values ​​include the average value, the maximum value and the median value;

[0123] A difference calculation submodule, used to calculate the difference between the characteristic value of the electrical signal at the end of the current day and the characteristic value of the electrical signal at the end of the day before the preset day;

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

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

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

[0127] A second judgment module, used to judge whether the first-end voltage is less than a first threshold;

[0128] A power failure determination module, used to determine that there is a fault in the power supply of the door lock circuit when the voltage at the first end is less than a first threshold value, and to issue a fault reminder;

[0129] A third judgment module is used to judge whether the terminal electrical signal is greater than a second threshold and less than a third threshold when the head-end voltage is not less than a first threshold, wherein the second threshold is the terminal 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 warning module is used to issue a door lock failure 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 failure warning device further includes:

[0132] A first duration acquisition module, used for acquiring a first duration taken for the terminal electrical signal to change from a fourth threshold value to a fifth threshold value and stabilize during the closing process of the elevator door;

[0133] A fourth determination module, used to determine whether the first duration is greater than a first preset duration;

[0134] The third warning module is used to send a door lock failure warning signal when the first time length is greater than a first preset time length.

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

[0136] A second time acquisition module is used to acquire a second time taken for the terminal electrical signal to change from the fifth threshold to the fourth threshold and stabilize during the process of the elevator door opening;

[0137] A fifth determination module, used to determine whether the second duration is greater than a second preset duration;

[0138] The fourth warning module is used to send a door lock failure warning signal when the second time period is greater than a second preset time period.

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

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

[0141] a sixth determination module, configured to determine whether the change rate of the first duration is greater than a first rate threshold, or whether the change rate of the second duration is greater than a second rate threshold;

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

[0143] The above-mentioned elevator door lock failure warning device can execute the elevator door lock failure warning method provided by the aforementioned embodiment of the present invention, and has the corresponding functional modules and beneficial effects of executing the elevator door lock failure warning method.

[0144] Figure 5 A schematic diagram of the structure 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 may also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, 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 examples and are not intended to limit the implementation of the present invention described and / or required herein.

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

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

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

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

[0149] Various implementations 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 chips (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various implementations can include: being implemented in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which can be a special purpose or general purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0150] Computer programs for implementing 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, so that when the computer program is executed by the processor, the functions / operations specified in the flow chart and / or block diagram are implemented. The computer program may be executed entirely on the machine, partially on the machine, partially on the machine and partially on a remote machine as a stand-alone software package, or entirely on a remote machine or server.

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

[0152] To provide interaction with a user, the systems and techniques described herein may 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 a pointing device (e.g., a mouse or trackball) through which the user can provide input to the electronic device. Other types of devices may also be used to provide interaction with the user; for example, the feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form (including acoustic input, voice input, or tactile input).

[0153] The systems and techniques described herein may be implemented in a computing system that includes backend components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes frontend components (e.g., a user computer with a graphical user interface or a web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such backend components, middleware components, or frontend components. The components of the system may be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0154] A computing system may include a client and a server. The client and the server are generally remote from each other and usually interact through a communication network. The client and server relationship is generated by computer programs running on the corresponding computers and having a client-server relationship with each other. The server may be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system to solve the defects of difficult management and weak business scalability in traditional physical hosts and VPS services.

[0155] An embodiment of the present invention further provides a computer program product, including a computer program, which, when executed by a processor, implements the elevator door lock failure warning method provided in any embodiment of the present application.

[0156] In the process of implementation, the computer program product can be written in one or more programming languages ​​or a combination thereof to perform the computer program code of the present invention, including object-oriented programming languages, such as Java, Smalltalk, C++, and conventional procedural programming languages, such as "C" language or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer can be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or can be connected to an external computer (for example, using an Internet service provider to connect through the Internet).

[0157] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0158] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An elevator door lock failure early warning method, characterized in that: include: When the elevator door is closed, a terminal electrical signal of the door lock circuit is collected, wherein the terminal electrical signal is a terminal voltage or a terminal current; Calculating the rate of change of the terminal electrical signal based on the terminal electrical signal collected at multiple collection moments; Determining whether the change rate is greater than a preset rate; When the rate of change is greater than a preset rate, a door lock failure warning signal is issued.

2. The elevator door lock failure early warning method according to claim 1, characterized in that: Based on the terminal electrical signals collected at multiple collection moments, the change rate of the terminal electrical signals is calculated, including: Performing data processing on the terminal electrical signals collected every day, and calculating characteristic values ​​of the terminal electrical signals collected every day, wherein the characteristic values ​​include but are not limited to the average value, the maximum value, and the median; Calculate the difference between the characteristic value of the electric signal at the end of the current day and the characteristic value of the electric signal at the end of the day before the preset day; The quotient of the difference and the preset day is calculated to obtain the rate of change of the terminal electrical signal.

3. The elevator door lock failure early warning method according to claim 1, characterized in that: Also includes: Collect the voltage at the first end of the door lock circuit; Determining whether the first-end voltage is less than a first threshold; If yes, it is determined that there is a fault in the power supply of the door lock circuit, and a fault reminder is issued; If not, determine whether the terminal electrical signal is greater than a second threshold and less than a third threshold, the second threshold being the terminal electrical signal when the door lock is disconnected, and the third threshold being less than the door lock disconnection signal trigger voltage of the door lock open / close identification load; If so, a door lock failure warning signal is issued.

4. The elevator door lock failure early warning method according to claim 1, characterized in that: Also includes: During the closing process of the elevator door, collecting the first time duration for the terminal electrical signal to change from the fourth threshold value to the fifth threshold value and stabilize; Determining whether the first duration is greater than a first preset duration; If so, a door lock failure warning signal is issued.

5. The elevator door lock failure early warning method according to claim 4 is characterized in that: Also includes: During the process of the elevator door opening, collecting the second time length taken for the terminal electrical signal to change from the fifth threshold value to the fourth threshold value and stabilize; Determining whether the second duration is greater than a second preset duration; If so, a door lock failure warning signal is issued.

6. The elevator door lock failure early warning method according to claim 5, characterized in that: Also includes: Based on the first duration corresponding to multiple elevator door closings, the change rate of the first duration is calculated, or based on the second duration corresponding to multiple elevator door openings, the change rate of the second duration is calculated; Determine whether the change rate of the first duration is greater than a first rate threshold, or whether the change rate of the second duration is greater than a second rate threshold; If the change rate of the first time length is greater than the first rate threshold, or the change rate of the second time length is greater than the second rate threshold, a door lock failure warning signal is issued.

7. An elevator door lock failure warning system, characterized in that: include: Door lock circuit power supply, used to power the door lock circuit; Multiple door locks, multiple door locks are connected in series on the door lock circuit power supply to form a door lock circuit; A door lock open / close identification load, which is connected in series at the end of the door lock circuit; A controller, wherein the controller is respectively connected to the head end, the end end and the door lock opening and closing identification load of the door lock circuit, and is used to execute the elevator door lock fault early warning method as described in any one of claims 1-6.

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

9. An electronic device, characterized in that: include: one or more processors; A 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 failure warning method as described in any one of claims 1-6.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the elevator door lock failure warning method as described in any one of claims 1 to 6 is implemented.

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