Door lock flash detection device and detection method, elevator control system and computer readable storage medium

Abstract

The invention discloses a door lock flash detection device and method, an elevator control system and a computer readable storage medium, the door lock flash detection device comprises a first voltage sampling unit and a main control unit, the input end of the first voltage sampling unit is connected with the tail end of a door lock loop, and the input end of the main control unit is connected with the tail end of the door lock loop; the first voltage sampling unit samples the terminal voltage value of the door lock loop, the output end of the first voltage sampling unit is connected with the main control unit, and the main control unit judges whether door lock flash occurs in the door lock loop according to the terminal voltage value of the door lock loop; by analyzing the sampled terminal voltage value of the door lock loop, the abnormal flash phenomenon of the door lock can be accurately and reliably detected, the scheme is simple and reliable, and the cost is low.

Description

Technical Field

[0001] The present application relates to the technical field of elevator control, and in particular to a door lock flash detection device and detection method, an elevator control system and a computer-readable storage medium. Background Art

[0002] During the operation of the elevator, due to abnormal conditions such as aging of the door lock, door knife rubbing against the door ball, etc., the door lock may be disconnected briefly in milliseconds and then return to normal (flash disconnection). The flash disconnection of the door lock may cause the elevator to report other faults besides the door lock, and the cause of the fault is difficult to find out. Therefore, it is very important to detect the status of the door lock and eliminate the factors that cause the flash disconnection of the door lock in time for the reliable operation of the elevator system. The existing technology usually uses the following methods to detect the door lock:

[0003] Mechanical locking devices use mechanical structures to close and open the door lock. This method is simple, but easy to wear and tear, and cannot monitor the status of the lock in real time, especially millisecond-level status changes are difficult to capture.

[0004] Electrical switch monitoring uses an electrical switch (such as a micro switch) to detect whether the door lock is in a locked state; this method is relatively simple and easy to install, but there is also a certain error, and it cannot accurately and effectively detect the instantaneous shutdown of the switch.

[0005] Photoelectric sensor uses photoelectric sensor to detect the state of door lock, and confirms whether the door lock is closed by infrared or laser beam. This method has high sensitivity, but it may be affected by dust, dirt and other environments, resulting in misjudgment.

[0006] The existing technology cannot accurately and reliably detect the flashing of door locks, and the solution is costly, so it is necessary to develop a low-cost and reliable solution to solve the above problem. Summary of the invention

[0007] The main purpose of the present invention is to provide a door lock flash detection device and detection method, an elevator control system and a computer-readable storage medium, aiming to solve the situation where the door lock flash cannot be reliably detected.

[0008] To achieve the above objectives, this application provides the following technical solutions:

[0009] According to one aspect of the present invention, a door lock flash detection device is provided, the door lock flash detection device comprising a first voltage sampling unit and a main control unit, the input end of the first voltage sampling unit is connected to the end of the door lock circuit, the first voltage sampling unit samples the terminal voltage value of the door lock circuit, the output end of the first voltage sampling unit is connected to the main control unit, and the main control unit judges whether the door lock flash occurs in the door lock circuit according to the terminal voltage value of the door lock circuit;

[0010] The door lock circuit includes a power supply, a door lock unit and a load, wherein the power supply, the door lock unit and the load are connected in series in sequence, and the end of the door lock circuit is the connection end between the door lock unit and the load; the door lock unit includes one or more door locks, and when multiple door locks are included, the multiple door locks are electrically connected in series.

[0011] Optionally, the door lock flash detection device also includes a second voltage sampling unit, the input end of the second voltage sampling unit is connected to the head end of the door lock circuit, the head end of the door lock circuit is the connection end between the door lock unit and the power supply, and the main control unit determines whether a door lock flash occurs in the door lock circuit based on the terminal voltage value of the door lock circuit and the head end voltage value of the door lock circuit.

[0012] Optionally, the door lock flash detection device also includes a communication circuit, which is connected to the main control unit, and the main control unit exchanges information with an external control system through the communication circuit.

[0013] According to another aspect of the present invention, a door lock flash detection method is provided, the method is applied to a door lock flash detection device, and the door lock flash detection method comprises:

[0014] Close all door locks in the door lock unit to make the door lock circuit electrically conductive;

[0015] Continuously obtaining the terminal voltage value of the door lock circuit;

[0016] It is determined whether there is a door lock flash failure in the door lock circuit according to the terminal voltage value of the door lock circuit.

[0017] Optionally, the step of judging whether there is a door lock flash failure in the door lock circuit according to the terminal voltage value of the door lock circuit includes:

[0018] If the terminal voltage value of the door lock circuit drops instantaneously, it is determined that there is a door lock flash disconnection in the door lock circuit. If the terminal voltage value of the door lock circuit does not drop instantaneously, it is determined that there is no door lock flash disconnection in the door lock circuit.

[0019] Optionally, the step of judging whether there is a door lock flash failure in the door lock circuit according to the terminal voltage value of the door lock circuit includes:

[0020] If the terminal voltage value of the door lock circuit drops instantaneously, and the instantaneous voltage drop amplitude of the terminal voltage value within a preset time range continues to be greater than the first voltage threshold, it is determined that there is a door lock flash in the door lock circuit; otherwise, it is determined that there is no door lock flash in the door lock circuit.

[0021] Optionally, before the step of judging whether there is a door lock flash in the door lock circuit according to the terminal voltage value of the door lock circuit, the door lock flash detection method further includes:

[0022] Continuously obtaining the voltage value of the first end of the door lock circuit;

[0023] The step of judging whether there is a door lock flash failure in the door lock circuit according to the terminal voltage value of the door lock circuit comprises:

[0024] It is determined whether there is a door lock flash failure in the door lock circuit according to the terminal voltage value and the head end voltage value of the door lock circuit.

[0025] Optionally, the step of judging whether there is a door lock flash failure in the door lock circuit according to the terminal voltage value and the head end voltage value of the door lock circuit includes:

[0026] If the terminal voltage value of the door lock circuit drops momentarily and the head-end voltage value does not drop momentarily, it is determined that there is a door lock flash failure in the door lock circuit; if the terminal voltage value of the door lock circuit drops momentarily and the head-end voltage value also drops momentarily, it is determined that there is no door lock flash failure in the door lock circuit.

[0027] Optionally, the step of judging whether there is a door lock flash failure in the door lock circuit according to the terminal voltage value and the head end voltage value of the door lock circuit includes:

[0028] If the terminal voltage value of the door lock circuit drops instantaneously, and the instantaneous drop amplitude of the terminal voltage within the preset time range is continuously greater than the first voltage threshold, and the instantaneous drop amplitude of the head end voltage value within the preset time range is continuously greater than the second voltage threshold, then it is determined that there is no door lock flash in the door lock circuit; otherwise, it is determined that there is a door lock flash in the door lock circuit.

[0029] Optionally, the door lock flash detection method further includes:

[0030] The lowest voltage value among the terminal voltage values ​​of the door lock circuit when a flash occurs in the door lock circuit is recorded, and the first voltage threshold is adjusted according to the lowest voltage value.

[0031] Optionally, the door lock flash detection method is applied to an elevator system, and the door lock is a car door lock or a floor hall door lock of the elevator system.

[0032] Optionally, the door lock flash detection method further includes:

[0033] In the case that the door lock flashes off in the door lock circuit, the floor information of the elevator car is determined according to the door lock flashing off time.

[0034] According to another aspect of the present invention, an elevator control system is provided, and the elevator control system includes the door lock flash detection device.

[0035] Optionally, the elevator control system further includes the door lock circuit and an elevator control unit, and the elevator control unit exchanges information with a main control unit of the door lock flash detection device via a communication circuit.

[0036] According to another aspect of the present invention, an elevator control system is provided, and the elevator control system executes the door lock flash detection method during operation.

[0037] The present invention also provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the door lock flash detection method described above are implemented.

[0038] The present invention has at least the following technical benefits:

[0039] The door lock flash-off device provided by the present invention comprises a first voltage sampling unit and a main control unit, wherein the input end of the first voltage sampling unit is connected to the end of the door lock circuit, the first voltage sampling unit samples the terminal voltage value of the door lock circuit, the output end of the first voltage sampling unit is connected to the main control unit, and the main control unit determines whether the door lock flashes according to the terminal voltage value of the door lock circuit. Compared with the prior art, the scheme of the present application is simple and reliable, and can detect the abnormal flash-off phenomenon of the door lock accurately and reliably at low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 A schematic diagram of the structure of a door lock flash detection device provided in an embodiment of the present application;

[0041] Figure 2 Another structural schematic diagram of the door lock flash detection device provided in an embodiment of the present application;

[0042] Figure 3 Another structural schematic diagram of the door lock flash detection device provided in an embodiment of the present application;

[0043] Figure 4 Another structural schematic diagram of the door lock flash detection device provided in an embodiment of the present application;

[0044] Figure 5 A schematic diagram of a door lock flash detection method flow chart provided in an embodiment of the present application;

[0045] Figure 6 A schematic diagram of the structure of an elevator control system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solutions and advantages of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0047] It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0048] In this application, the term "comprises", "includes" or any other variation thereof is intended to cover non-exclusive inclusion, so that a device or system including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such a device or system. In the absence of more restrictions, an element defined by the sentence "includes..." does not exclude the presence of other identical elements in the device or system including the element.

[0049] like Figure 1-4 As shown, an embodiment of the present application provides a door lock flash detection device 10, which includes a first voltage sampling unit 101 and a main control unit 103. The input end of the first voltage sampling unit 101 is connected to the end of the door lock circuit 20, and the first voltage sampling unit 101 samples the terminal voltage value of the door lock circuit 20. The output end of the first voltage sampling unit 101 is connected to the main control unit 103. The main control unit 103 determines whether the door lock circuit 20 has a door lock flash according to the voltage value of the terminal A of the door lock circuit 20.

[0050] The first voltage sampling unit 101 can adopt a common voltage sampling circuit or a voltage sampling chip (such as an AMC1301 sampling chip). The sampled voltage is sent to the main control unit 103 after processing. The main control unit 103 includes an MCU processor. The MCU processor analyzes the sampled voltage to determine whether there is a door lock flash in the lock unit 202; if all door locks in the door lock unit 202 are normal, the voltage at the end A of the door lock circuit 20 should be consistent with the output voltage of the power supply 201. For example, if the output voltage of the power supply 201 is a stable DC power supply, then the voltage at the end A of the door lock circuit 20 should also be a stable DC voltage.

[0051] The door lock circuit 20 includes a power supply 201, a door lock unit 202 and a load 203. The power supply 201, the door lock unit 202 and the load 203 are connected in series in sequence. The end A of the door lock circuit is the connection end between the door lock unit 202 and the load. The power supply 201 can be a DC power supply or an AC power supply. When it is a DC power supply, the positive end of the DC power supply is connected to the first end of the door lock 202, the second end of the door lock unit 202 is connected to the first end of the load 203, and the second end of the load 203 is connected to the negative end of the DC power supply. When it is an AC power supply, the first end of the AC power supply is connected to the first end of the door lock unit 202, the second end of the door lock unit 202 is connected to the first end of the load 203, and the second end of the load 203 is connected to the other end of the AC power supply. The door lock unit 202 includes one or more door locks. When it includes multiple door locks, such as Figure 2 As shown, multiple door locks (door lock 1, door lock 2, ..., door lock n) are electrically connected in series; the load 203 can be a resistor or other power-consuming devices or equipment, and the load 203 provides current limiting function for the door lock circuit 20.

[0052] The prior art uses mechanical locking devices, electrical switch monitoring or photoelectric sensors to detect door locks. However, these methods have poor reliability and are unable to detect door lock flash failure (door lock briefly disconnects for milliseconds and then returns to normal). Compared with the prior art, the present application scheme can accurately and reliably detect abnormal flash failures in the door lock by sampling and analyzing the voltage at the end A of the door lock circuit 20.

[0053] Optionally, the door lock flash-break detection device 10 further includes a second voltage sampling unit 102, the input end of the second voltage sampling unit 102 is connected to the head end B of the door lock circuit 20, the head end B of the door lock circuit is the connection end between the door lock unit and the power supply, and the main control unit 103 determines whether a flash-break occurs in the door lock circuit 20 according to the terminal voltage value of the door lock circuit and the head end voltage value of the door lock circuit. The second voltage sampling unit 102 can adopt the same scheme as the first voltage sampling unit 101, and the sampled voltage is sent to the main control unit 103 after processing. The MCU processor of the main control unit 103 performs a comprehensive analysis on the voltages sampled by the first voltage sampling unit 101 and the second voltage sampling unit 102 to determine whether a door lock flash-break occurs in the door lock unit 202, and the judgment conclusion is more reliable.

[0054] Optionally, the door lock flash detection device 10 also includes a communication circuit 104, which is connected to the main control unit 203, and the main control unit 203 exchanges information with the external control system through the communication circuit 104; the information interaction includes the door lock flash detection device 10 sending flash fault information to the external control system and / or the lock flash detection device 10 receiving control information from the external control system, thereby realizing information exchange between the flash detection device 10 and the external control system; the communication circuit 104 includes CAN communication or RS485 communication.

[0055] like Figure 5 As shown, it shows a flow chart of a door lock flash detection method provided in an embodiment of the present application. The door lock flash detection method is applied to the door lock flash detection device 10. The door lock flash detection method includes:

[0056] S101: Close all door locks in the door lock unit to make the door lock circuit electrically conductive;

[0057] S102: Continuously obtain the terminal voltage value of the door lock circuit;

[0058] S103: Determine whether there is a door lock flash failure in the door lock circuit 20 according to the terminal voltage value of the door lock circuit.

[0059] Specifically, the MCU processor of the main control unit 103 receives the voltage value of the terminal A of the door lock circuit 20 sampled by the first voltage sampling unit 101, and continuously samples and monitors the voltage value. If the door lock unit 202 in the door lock circuit 20 has a flash disconnection phenomenon, the sampled voltage value of the terminal A of the door lock circuit 20 will change, and the main control unit 103 can analyze and judge whether the door lock circuit 20 has a flash disconnection based on this voltage change. The flash disconnection detection method of the present application is simple and reliable, and only needs to sample the voltage of one point, and any one or more door locks in the door lock unit 202 can be detected.

[0060] Optionally, the step of judging whether there is a door lock flash failure in the door lock circuit by the terminal voltage value of the door lock circuit includes:

[0061] S1031: If the terminal voltage value of the door lock circuit drops instantaneously, it is determined that there is a door lock flash disconnection in the door lock circuit. If the terminal voltage value of the door lock circuit does not drop instantaneously, it is determined that there is no door lock flash disconnection in the door lock circuit.

[0062] Specifically, when any one or more door locks in the door lock unit 202 flash off, the door lock circuit 20 is equivalent to being disconnected during the flash off, and the voltage at point A at the end of the door lock circuit 20 will drop instantaneously. The time of the instantaneous drop is consistent with the duration of the flash off of the door lock, such as a drop of 5ms, 50ms, or 500ms. When the main control unit 103 detects the instantaneous drop, it can be determined that there is a door lock flash off in the door lock circuit 20.

[0063] Optionally, the step of judging whether there is a door lock flash failure in the door lock circuit by the terminal voltage value of the door lock circuit further includes:

[0064] S1032: If the terminal voltage value of the door lock circuit drops instantaneously, and the instantaneous drop amplitude of the terminal voltage value within the preset time range continues to be greater than the first voltage threshold, the instantaneous drop determines that there is a door lock flash in the door lock circuit; otherwise, it is determined that there is no door lock flash in the door lock circuit.

[0065] That is to say, since the power supply 201 of the door lock circuit 20 may fluctuate, by setting a threshold and a duration threshold for the instantaneous drop amplitude of the terminal voltage value, the sampling voltage changes caused by other reasons can be filtered out, making the flash judgment of the door lock more accurate.

[0066] Optionally, before the step of determining whether there is a door lock flash failure in the door lock circuit according to the terminal voltage value of the door lock circuit, the door lock flash failure detection method further includes:

[0067] S1021: Continuously obtain the voltage value of the first end of the door lock circuit;

[0068] The step of judging whether there is a door lock flash in the door lock circuit according to the terminal voltage value of the door lock circuit includes: S1033: judging whether there is a door lock flash in the door lock circuit according to the terminal voltage value and the head end voltage value of the door lock circuit.

[0069] By detecting the voltage value at the first end of the door lock circuit 20 and the voltage value at the end of the lock circuit 20 for comparison and analysis, the accuracy of judging whether the door lock is flickering can be further improved.

[0070] Optionally, the step of judging whether there is a door lock flash failure in the door lock circuit according to the terminal voltage value and the head end voltage value of the door lock circuit includes:

[0071] S10331: If the terminal voltage value of the door lock circuit drops instantaneously, and the voltage value at the head end does not drop instantaneously, it is determined that there is a door lock flash in the door lock circuit; if the terminal voltage value of the door lock circuit drops instantaneously, and the voltage value at the head end also drops instantaneously, it is determined that there is no door lock flash in the door lock circuit; in addition, if the terminal voltage value of the door lock circuit does not drop instantaneously, regardless of whether the voltage value at the head end drops instantaneously, it is determined that there is no door lock flash in the door lock circuit. By separately determining whether the voltage values ​​at the head end and the terminal end of the door lock circuit drop instantaneously, it is possible to avoid misjudging the existence of a door lock flash in the door lock circuit 20 due to the terminal voltage drop caused by the head end voltage drop, thereby further improving the accuracy of the judgment.

[0072] Optionally, the step of judging whether there is a door lock flash failure in the door lock circuit according to the terminal voltage value and the head end voltage value of the door lock circuit includes:

[0073] S10332: If the terminal voltage value of the door lock circuit drops instantaneously, and the instantaneous drop amplitude of the terminal voltage within the preset time range is continuously greater than the first voltage threshold, and the instantaneous drop amplitude of the head end voltage value within the preset time range is continuously greater than the second voltage threshold, then it is determined that there is no door lock flash in the door lock circuit; otherwise, it is determined that there is a door lock flash in the door lock circuit 20; it should be noted that the first voltage threshold and the second voltage threshold may be the same or different.

[0074] By respectively judging whether the voltage values ​​at the beginning and the end of the door lock circuit drop momentarily in the same time period, it is possible to further more accurately judge whether there is a door lock flash failure in the door lock circuit 20 .

[0075] Optionally, the door lock flash detection method also includes:

[0076] S104: Recording the lowest voltage value among the terminal voltage values ​​of the door lock circuit when a flash occurs in the door lock circuit, and adjusting the first voltage threshold according to the lowest voltage value.

[0077] Since the power supply 201 in the door lock circuit 20 may fluctuate, an unreasonable setting of the first voltage threshold may lead to a misjudgment of a door lock flash in the door lock circuit 20. If a misjudgment occurs, the first voltage threshold may be adjusted in combination with the lowest voltage value recorded during the flash.

[0078] Optionally, the door lock flash detection method of the present application is applied to an elevator system, and the door lock is a car door lock or a floor hall door lock of the elevator system. During the operation of the elevator, the elevator door lock may flash due to abnormal working conditions such as aging of the door lock, door knife rubbing against door ball, etc. The present application method can reliably detect the aging problem of the elevator car door lock or floor hall door lock, or mechanical installation problem, and timely maintenance and processing can be carried out, thereby improving the reliability of the elevator system.

[0079] Optionally, the door lock flash detection method also includes:

[0080] S105: When the door lock flashes in the door lock circuit, determine the floor information of the elevator car according to the flashing time of the door lock. During the operation of the elevator, when the car runs near the hall door of the floor, the elevator hall door ball is rubbed by the car door knife, which easily causes the hall door lock of the floor to flash. Therefore, when the flash occurs, the floor information of the elevator car is recorded at the flashing time, so that it can be known which floor's hall door lock flashes, and the maintenance personnel can quickly reach the floor to perform maintenance.

[0081] like Figure 6 As shown, an elevator control system provided in an embodiment of the present application is shown, and the elevator control system includes the above-mentioned door lock flash detection device 10.

[0082] Optionally, the elevator control system further includes a door lock circuit and an elevator control unit, and the elevator control unit exchanges information with the main control unit of the door lock flash detection device through a communication circuit. The elevator control unit 30 includes an elevator traction machine driver or other controllers of the elevator system 100, and the elevator control unit 30 is connected in communication with the main control unit 103 of the lock flash detection device 10, so that the elevator control unit 30 and the lock flash detection device 10 can realize information synchronization and sharing.

[0083] An embodiment of the present application also provides an elevator control system, which executes the above-mentioned door lock flash detection method during operation.

[0084] In addition, an embodiment of the present application further proposes a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, the steps of the above-mentioned door lock flash detection method are implemented.

[0085] The above are only some embodiments of the present application, and are not intended to limit the patent scope of the present application. All equivalent structural changes made using the contents of the present application specification and drawings under the technical concept of the present application, or direct / indirect application in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A door lock flash detection device, characterized in that: The door lock flash detection device includes a first voltage sampling unit and a main control unit, the input end of the first voltage sampling unit is connected to the end of the door lock circuit, the first voltage sampling unit samples the terminal voltage value of the door lock circuit, the output end of the first voltage sampling unit is connected to the main control unit, and the main control unit determines whether the door lock flash occurs in the door lock circuit according to the terminal voltage value of the door lock circuit; The door lock circuit includes a power supply, a door lock unit and a load, wherein the power supply, the door lock unit and the load are connected in series in sequence, and the end of the door lock circuit is the connection end between the door lock unit and the load; the door lock unit includes one or more door locks, and when multiple door locks are included, the multiple door locks are electrically connected in series.

2. The door lock flash detection device according to claim 1, characterized in that: The door lock flash detection device also includes a second voltage sampling unit, the input end of the second voltage sampling unit is connected to the head end of the door lock circuit, the head end of the door lock circuit is the connection end between the door lock unit and the power supply, and the main control unit determines whether the door lock flash occurs in the door lock circuit based on the terminal voltage value of the door lock circuit and the head end voltage value of the door lock circuit.

3. The door lock flash detection device according to any one of claims 1-2, characterized in that: The door lock flash detection device also includes a communication circuit, which is connected to the main control unit. The main control unit exchanges information with an external control system through the communication circuit.

4. A door lock flash detection method, characterized in that: Applied to the door lock flash detection device according to any one of claims 1 to 3, the door lock flash detection method comprises: Close all door locks in the door lock unit to make the door lock circuit electrically conductive; Continuously obtaining the terminal voltage value of the door lock circuit; It is determined whether there is a door lock flash failure in the door lock circuit according to the terminal voltage value of the door lock circuit.

5. The door lock flash detection method according to claim 4, characterized in that: The step of judging whether there is a door lock flash failure in the door lock circuit according to the terminal voltage value of the door lock circuit comprises: If the terminal voltage value of the door lock circuit drops instantaneously, it is determined that there is a door lock flash disconnection in the door lock circuit. If the terminal voltage value of the door lock circuit does not drop instantaneously, it is determined that there is no door lock flash disconnection in the door lock circuit.

6. The door lock flash detection method according to claim 4, characterized in that: The step of judging whether there is a door lock flash failure in the door lock circuit according to the terminal voltage value of the door lock circuit comprises: If the terminal voltage value of the door lock circuit drops instantaneously, and the instantaneous voltage drop amplitude of the terminal voltage value within a preset time range continues to be greater than the first voltage threshold, it is determined that there is a door lock flash in the door lock circuit; otherwise, it is determined that there is no door lock flash in the door lock circuit.

7. The door lock flash detection method according to claim 4, characterized in that: Before the step of judging whether there is a door lock flash failure in the door lock circuit according to the terminal voltage value of the door lock circuit, the door lock flash failure detection method further includes: Continuously obtaining the voltage value of the first end of the door lock circuit; The step of judging whether there is a door lock flash failure in the door lock circuit according to the terminal voltage value of the door lock circuit comprises: It is determined whether there is a door lock flash failure in the door lock circuit according to the terminal voltage value and the head end voltage value of the door lock circuit.

8. The door lock flash detection method according to claim 7, characterized in that: The step of judging whether there is a door lock flash failure in the door lock circuit according to the terminal voltage value and the head end voltage value of the door lock circuit comprises: If the terminal voltage value of the door lock circuit drops momentarily and the head-end voltage value does not drop momentarily, it is determined that there is a door lock flash failure in the door lock circuit; if the terminal voltage value of the door lock circuit drops momentarily and the head-end voltage value also drops momentarily, it is determined that there is no door lock flash failure in the door lock circuit.

9. The door lock flash detection method according to claim 7, characterized in that: The step of judging whether there is a door lock flash failure in the door lock circuit according to the terminal voltage value and the head end voltage value of the door lock circuit comprises: If the terminal voltage value of the door lock circuit drops instantaneously, and the instantaneous voltage drop amplitude of the terminal voltage value within the preset time range continues to be greater than the first voltage threshold, and the instantaneous voltage drop amplitude of the head end voltage value within the preset time range continues to be greater than the second voltage threshold, then it is judged that there is no door lock flash in the door lock circuit; otherwise, it is judged that there is a door lock flash in the door lock circuit.

10. The door lock flash detection method according to claim 6, characterized in that: The door lock flash detection method also includes: The lowest voltage value among the terminal voltage values ​​of the door lock circuit when a flash occurs in the door lock circuit is recorded, and the first voltage threshold is adjusted according to the lowest voltage value.

11. The door lock flash detection method according to any one of claims 4 to 10, characterized in that: The door lock flash detection method is applied to an elevator system, and the door lock is a car door lock or a floor hall door lock of the elevator system.

12. The door lock flash detection method according to claim 11, characterized in that: The door lock flash detection method also includes: In the case that the door lock flashes off in the door lock circuit, the floor information of the elevator car is determined according to the door lock flashing off time.

13. An elevator control system, characterized in that: The elevator control system comprises the door lock flash detection device as described in any one of claims 1-3.

14. The elevator control system according to claim 13, characterized in that: The elevator control system also includes the door lock circuit and an elevator control unit. The elevator control unit exchanges information with the main control unit of the door lock flash detection device through a communication circuit.

15. An elevator control system, characterized in that: The elevator control system executes the door lock flash detection method as described in any one of claims 4-12 during operation.

16. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the door lock flash detection method described in any one of claims 4 to 12 are implemented.

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