Elevator landing door and car door lock short circuit detection circuit

Abstract

The embodiment of the invention relates to the field of circuit detection, and discloses an elevator landing door and car door lock short circuit detection circuit which is characterized in that a first connecting end of a front landing door lock is connected with a first electrical detection point, and a second connecting end of the front landing door lock is connected with a first common end after being connected with a first diode in series; a third connecting end of the rear landing door lock is connected with a second electrical detection point, and a fourth connecting end of the rear landing door lock is connected in series with a second diode and then is connected to a connecting line for connecting the first diode and the first common end through a first connecting point; the conduction directions of the second diode and the first diode connected to the circuit are opposite; the voltage detection module is connected with the first electrical detection point, the second electrical detection point and the first common end and used for detecting voltage signals of the front landing door lock and the rear landing door lock, short circuit of the elevator door lock can be accurately detected through the circuit, and the safety index of elevator operation is improved.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of circuits, and in particular to a short-circuit detection circuit for elevator hall door and car door locks. Background Art

[0002] An elevator is a device that moves vertically within a shaft and between different floors. There is a car door on the elevator car, and corresponding hall doors are provided on the shaft wall leading to each floor. Opening the car door and hall door allows passengers to enter and exit the car.

[0003] Unexpected car movement refers to the movement of the car leaving the landing without instructions in the unlocked area and with the door open, excluding movement caused by loading and unloading. When the elevator has double doors, if the front car door lock and the rear car door lock or the front hall door lock and the rear hall door lock are short-circuited and not detected, the elevator may move out of the door area with the door open, causing a safety accident. Summary of the invention

[0004] The purpose of the embodiments of the present application is to provide an elevator hall door and car door lock short-circuit detection circuit, which can accurately detect whether a short circuit occurs according to the change of the voltage signal when the front hall door lock and the rear hall door lock are short-circuited or the front car door lock and the rear car door lock are short-circuited, thereby improving the safety index of the elevator operation.

[0005] In order to solve the above technical problems, an embodiment of the present application provides an elevator hall door lock short circuit detection circuit, including: a first electrical detection point, a second electrical detection point, a first common terminal, a front hall door lock, a rear hall door lock, a first diode, a second diode and a voltage detection module;

[0006] The first connection end of the front hall door lock is connected to the first electrical detection point, and the second connection end of the front hall door lock is connected to the first common end after being connected in series with the first diode;

[0007] The third connection end of the rear hall door lock is connected to the second electrical detection point, and the fourth connection end of the rear hall door lock is connected in series with the second diode and then connected to the connection line connecting the first diode and the first common end through the first connection point; wherein the conduction direction of the second diode and the first diode connected to the circuit is opposite;

[0008] The voltage detection module is connected to the first electrical detection point, the second electrical detection point and the first common end respectively, and is used to detect voltage signals of the front hall door lock and the rear hall door lock respectively.

[0009] In the elevator hall door lock short circuit detection circuit as described above, the second connection end of the front hall door lock is connected in series with the first diode and then connected to the first common end, including: the second connection end of the front hall door lock is connected to the positive electrode of the first diode, and the negative electrode of the first diode is connected to the first common end.

[0010] In the elevator hall door lock short-circuit detection circuit as described above, the fourth connection end of the rear hall door lock is connected in series with the second diode, including: the fourth connection end of the rear hall door lock is connected to the cathode of the second diode, and the anode of the second diode is connected to the first connection point.

[0011] In the elevator hall door lock short circuit detection circuit as described above, the second connection end of the front hall door lock is connected in series with the first diode and then connected to the first common end, including: the second connection end of the front hall door lock is connected to the cathode of the first diode, and the anode of the first diode is connected to the first common end.

[0012] In the elevator hall door lock short-circuit detection circuit as described above, the fourth connection end of the rear hall door lock is connected in series with the second diode, including: the fourth connection end of the rear hall door lock is connected to the positive electrode of the second diode, and the negative electrode of the second diode is connected to the first connection point.

[0013] Another embodiment of the present application relates to an elevator car door lock short circuit detection circuit, characterized in that it includes: a third electrical detection point, a fourth electrical detection point, a second common terminal, a front car door lock, a rear car door lock, a third diode, a fourth diode and a voltage detection module;

[0014] The fifth connection end of the front car door lock is connected to the third electrical detection point, and the sixth connection end of the front car door lock is connected to the second common end after being connected in series with the third diode;

[0015] The seventh connection end of the rear car door lock is connected to the fourth electrical detection point, and the eighth connection end of the rear car door lock is connected in series with the fourth diode and then connected to the connection line connecting the third diode and the second common end through the second connection point; wherein the fourth diode and the third diode are connected to the circuit in opposite directions;

[0016] The voltage detection module is connected to the third electrical detection point, the fourth electrical detection point and the second common end respectively, and is used to detect voltage signals of the front car door lock and the rear car door lock respectively.

[0017] In the elevator car door lock short-circuit detection circuit as described above, the sixth connection end of the front car door lock is connected in series with the third diode and then connected to the second common end, including: the sixth connection end of the front car door lock is connected to the positive electrode of the third diode, and the negative electrode of the third diode is connected to the second common end.

[0018] In the elevator car door lock short-circuit detection circuit as described above, the eighth connection end of the rear car door lock is connected in series with the fourth diode, including: the eighth connection end of the rear car door lock is connected to the cathode of the fourth diode, and the anode of the fourth diode is connected to the second connection point.

[0019] In the elevator car door lock short-circuit detection circuit as described above, the sixth connection end of the front car door lock is connected in series with the third diode and then connected to the second common end, including: the sixth connection end of the front car door lock is connected to the cathode of the third diode, and the anode of the third diode is connected to the second common end.

[0020] In the elevator car door lock short-circuit detection circuit as described above, the eighth connection end of the rear car door lock is connected in series with the fourth diode, including: the eighth connection end of the rear car door lock is connected to the positive electrode of the fourth diode, and the negative electrode of the fourth diode is connected to the second connection point.

[0021] The above embodiment of the present application can obtain the voltage signal state of the front hall door lock by connecting the first electrical detection point and the first common terminal respectively through the voltage detection module, and can obtain the voltage signal state of the rear hall door lock by connecting the second electrical detection point and the first common terminal respectively through the voltage detection module, and can directly judge whether the front hall door lock and the rear hall door lock are short-circuited through the voltage signal state of the front hall door lock and the voltage signal state of the rear hall door lock. Compared with the existing technology, the safety index of elevator operation can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0023] Figure 1 The structure of the elevator hall door lock short circuit detection circuit provided according to an embodiment of the present application is shown in FIG. Figure 1 ;

[0024] Figure 2 The voltage variation waveform provided according to an embodiment of the present application is Figure 1 ;

[0025] Figure 3 The voltage variation waveform provided according to an embodiment of the present application is Figure 2 ;

[0026] Figure 4 is a voltage change waveform diagram when a hall door lock is short-circuited according to an embodiment of the present application;

[0027] Figure 5 This is a schematic diagram of an elevator hall door lock short circuit detection circuit structure provided according to another embodiment of the present application Figure 2 ;

[0028] Figure 6 It is a schematic diagram of the structure of an elevator car door lock short circuit detection circuit provided according to another embodiment of the present application. DETAILED DESCRIPTION

[0029] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the embodiments of the present application will be described in detail below in conjunction with the accompanying drawings. However, it will be appreciated by those skilled in the art that in the present application, many technical details are proposed in order to enable the reader to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical scheme claimed in the present application can also be implemented. The division of the following embodiments is for the convenience of description, and the specific implementation of the present application should not be construed as any limitation, and the various embodiments can be combined and referenced with each other under the premise of no contradiction.

[0030] One embodiment of the present application relates to an elevator hall door lock short circuit detection circuit, such as Figure 1 As shown, it includes: a first electrical detection point 1, a second electrical detection point 2, a first common terminal 3, a front hall door lock 4, a rear hall door lock 5, a first diode 6, a second diode 7 and a voltage detection module 8;

[0031] The first connection end of the front hall door lock 4 is connected to the first electrical detection point 1, and the second connection end of the front hall door lock 4 is connected to the first common end 3 after being connected in series with the first diode 6;

[0032] The third connection end of the rear hall door lock 5 is connected to the second electrical detection point 2, and the fourth connection end of the rear hall door lock 5 is connected in series with the second diode 7 and then connected to the connection line connecting the first diode 6 and the first common terminal 3 through the first connection point; wherein the conduction direction of the second diode 7 and the first diode 6 connected to the circuit is opposite;

[0033] The voltage detection module 8 is respectively connected to the first electrical detection point 1, the second electrical detection point 2 and the first common terminal 3, and is used to detect the voltage signals of the front hall door lock 4 and the rear hall door lock 5 respectively.

[0034] Specifically, generally speaking, short circuit refers to the two ends of two electrical appliances or power sources in the circuit being directly connected by wires, causing the current to bypass the electrical appliances, not emitting light or extinguishing. During the operation of the elevator, there is a special fault, namely the door lock short circuit fault. The judgment logic of this fault is that after opening the door, if the door lock is detected to be connected, it proves that a short circuit fault has occurred. There are multiple reasons for detecting the occurrence of a short circuit fault, and the most common one may be a short circuit between the door locks. Since the electrical detection point connected to the door lock is generally a metal contact, and the distance between the electrical detection points of the front and rear hall door locks of a double-door elevator is very close, during use, due to rough material craftsmanship or long use time, the metal of the electrical detection point leaks out, and the two electrical detection points are connected, causing a short circuit between the front and rear hall door locks. The short circuit in this embodiment refers to a short circuit between the first electrical detection point 1 and the second electrical detection point 2, that is, the front hall door lock 4 and the rear hall door lock 5 are short-circuited. The short circuit position can be between the first electrical detection point 1 and the first diode 6 and between the second electrical detection point 2 and the second diode 7.

[0035] When there is no short circuit and the elevator is in normal operation and the door lock is closed, the elevator door lock circuit is generally powered by sinusoidal AC. Figure 1 In the circuit structure shown in FIG. 1 , the voltage detection module 8 detects that the voltage between the first electrical detection point 1 and the first common terminal 3 changes within a sine wave cycle as follows: Figure 2 As shown, the voltage detection module 8 detects that the voltage condition between the second electrical detection point 2 and the first common terminal 3 changes within a sine wave cycle as shown in FIG. Figure 3 shown.

[0036] At this time, refer to Figure 1 In the circuit structure shown in FIG. 1 , if a short circuit occurs between the front hall door lock 4 and the rear hall door lock 5, then in the same sine wave cycle, the voltage detection module 8 detects that the voltage signal changes between the first electrical detection point 1 and the first common terminal 3 and between the second electrical detection point 2 and the first common terminal 3 should be as follows: Figure 4 It should be noted that, unless otherwise specified, each embodiment of the present solution is directed to the situation where each door lock is closed, and will not be described in detail hereinafter.

[0037] Therefore, according to the circuit structure in this scheme, a short circuit can occur between the first electrical detection point 1 and the second electrical detection point 2, that is, when a short circuit occurs between the front hall door lock 4 and the rear hall door lock 5, it will be reflected as a change in the voltage signal, thereby accurately determining the occurrence of the door lock short circuit fault.

[0038] In an example, Figure 1As shown, the specific connection structure of the second connection end of the front hall door lock 4 connected in series with the first diode 6 and then connected to the first common terminal 3 can be: the second connection end of the front hall door lock 4 is connected to the positive electrode of the first diode 6, and the negative electrode of the first diode 6 is connected to the first common terminal 3.

[0039] Correspondingly, at this time, the fourth connection end of the rear hall door lock 5 needs to be connected to the cathode of the second diode 7, and the anode of the second diode 7 is connected to the first connection point.

[0040] Specifically, the above connection method can make the first diode 6 and the second diode 7 connected to the circuit in different conduction directions. Figure 1 In the circuit structure, taking a sine wave cycle as an example, the voltage condition between the first electrical detection point 1 and the first common terminal 3 is as follows: Figure 2 As shown, during the T1 period, the forward power supply current flows from the first electrical detection point 1 through the front hall door lock 4 to the first diode 6. At this time, the first diode 6 can be turned on, and the current flows to the first common terminal 3 through the first diode 6. At this time, there is a forward voltage signal between the first electrical detection point 1 and the first common terminal 3; during the T2 period, the current reverses and wants to flow from the first common terminal 3 to the first electrical detection point 1, but at this time the first diode 6 is in the cut-off state and the current cannot pass through. At this time, there is no voltage signal between the first electrical detection point 1 and the first common terminal 3. During the T3 period, the power supply current reverses again, and flows from the first electrical detection point 1 through the front hall door lock 4 to the first diode 6. At this time, the first diode 6 can be turned on, and the current flows to the first common terminal 3 through the first diode 6. At this time, there is a forward voltage signal between the first electrical detection point 1 and the first common terminal 3; and during the T4 period, the current reverses again, and wants to flow from the first common terminal 3 to the first electrical detection point 1, but at this time the first diode 6 is in the cut-off state, and the current cannot pass through, so there is no voltage signal between the first electrical detection point 1 and the first common terminal 3.

[0041] Accordingly, in Figure 1 In the circuit structure, taking a sine wave cycle as an example, the voltage condition between the second electrical detection point 2 and the first common terminal 3 is as follows: Figure 3As shown, during the T1 period, the supply current flows from the second electrical detection point 2 to the second diode 7 via the rear hall door lock 5. At this time, the second diode 7 is cut off and the current cannot pass through. At this time, there is no voltage signal between the second electrical detection point 2 and the first common terminal 3; during the T2 period, the current reverses and wants to flow from the first common terminal 3 to the second electrical detection point 2. At this time, the second diode 7 is in the on state, and the current flows to the second electrical detection point 2 via the second diode 7. At this time, there is a negative voltage signal between the second electrical detection point 2 and the first common terminal 3; during the T3 period The internal power supply current reverses again, flowing from the second electrical detection point 2 through the rear hall door lock 5 to the first common terminal 3, but at this time the second diode 7 is cut off again, and the current cannot pass through. At this time, there is no voltage signal between the second electrical detection point 2 and the first common terminal 3; and during the T4 period, the current reverses again, flowing from the first common terminal 3 to the second electrical detection point 2. At this time, the second diode 7 is in the on state, and the current can flow to the second electrical detection point 2 through the second diode 7. At this time, there is a negative voltage signal between the second electrical detection point 2 and the first common terminal 3.

[0042] However, if a short circuit occurs between the front hall door lock 4 and the rear hall door lock 5, the voltage signal between the first electrical detection point 1 and the first common terminal 3 is as shown in FIG. Figure 4 As shown. Specifically, if a short circuit occurs, during the T2 period, when the current reverses for the first time, the current cannot flow through the first diode 6 to the first electrical detection point 1. However, since the second diode 7 is in the on state at this time, and a short circuit occurs between the front hall door lock 4 and the rear hall door lock 5, the current can flow through the second diode 7, the rear hall door lock 5 and the short circuit line to the first electrical detection point 1. At this time, the voltage detection module 8 can detect that there is a negative voltage signal between the first electrical detection point 1 and the first common terminal 3, and the same is true for the T4 period. In another example, as Figure 5 As shown, the specific connection structure in which the second connection end of the front hall door lock 4 is connected in series with the first diode 6 and then connected to the first common terminal 3 can be: the second connection end of the front hall door lock 4 is connected to the cathode of the first diode 6, and the anode of the first diode 6 is connected to the first common terminal 3.

[0043] Correspondingly, at this time, the fourth connection end of the rear hall door lock 5 needs to be connected to the anode of the second diode 7, and the cathode of the second diode 7 is connected to the first connection point.

[0044] Specifically, by Figure 5 The voltage conditions between the first electrical detection point 1, the second electrical detection point 2 and the first common terminal 3 measured by the circuit structure shown are similar to those shown in FIG. Figure 1 The voltage conditions between the first electrical detection point 1, the second electrical detection point 2 and the first common terminal 3 measured by the circuit structure shown are exactly opposite.

[0045] In such Figure 5 In the circuit structure, taking a sine wave cycle as an example, the voltage condition between the first electrical detection point 1 and the first common terminal 3 is as follows: Figure 3 Specifically, during the T1 period, the forward supply current flows from the first electrical detection point 1 through the front hall door lock 4 to the first diode 6. At this time, the first diode 6 is cut off and the current cannot pass through. At this time, there is no voltage signal between the first electrical detection point 1 and the first common terminal 3; during the T2 period, the current reverses and wants to flow from the first common terminal 3 to the first electrical detection point 1. At this time, the first diode 6 is in the on state, and the current flows to the first electrical detection point 1 through the first diode 6. At this time, there is a negative voltage signal between the first electrical detection point 1 and the first common terminal 3; during the T3 period, the current flows from the first common terminal 3 to the first electrical detection point 1. The internal current reverses again, and the forward power supply current flows from the first electrical detection point 1 through the front hall door lock 4 to the first diode 6. At this time, the first diode 6 is cut off again, and the current cannot pass through. At this time, there is no voltage signal between the first electrical detection point 1 and the first common terminal 3; during the T4 period, the current reverses again, and wants to flow from the first common terminal 3 to the first electrical detection point 1. At this time, the first diode 6 is in the on state, and the current flows to the first electrical detection point 1 through the first diode 6. At this time, there is a negative voltage signal between the first electrical detection point 1 and the first common terminal 3.

[0046] Accordingly, in Figure 5 In the circuit structure, taking a sine wave cycle as an example, the voltage condition between the second electrical detection point 2 and the first common terminal 3 is as follows: Figure 2 shown. Specifically, during the T1 period, the power supply current flows from the second electrical detection point 2 to the second diode 7 via the rear hall door lock 5. At this time, the second diode 7 can be turned on, and the current flows to the first common terminal 3 via the second diode 7. At this time, there is a forward voltage signal between the second electrical detection point 2 and the first common terminal 3; during the T2 period, the current reverses and wants to flow from the first common terminal 3 to the second electrical detection point 2. At this time, the second diode 7 is in the cut-off state, and the current cannot pass through. At this time, there is no voltage signal between the second electrical detection point 2 and the first common terminal 3; during the T3 period, the power supply current reverses again and flows from the second electrical detection point 2 to the second diode 7 via the rear hall door lock 5. At this time, the second diode 7 can be turned on, and the current flows to the first common terminal 3 via the second diode 7. At this time, there is a forward voltage signal between the second electrical detection point 2 and the first common terminal 3; during the T4 period, the current reverses again and wants to flow from the first common terminal 3 to the second electrical detection point 2. At this time, the second diode 7 is in the cut-off state, and the current cannot pass through. At this time, there is no voltage signal between the second electrical detection point 2 and the first common terminal 3.

[0047] However, if a short circuit occurs between the front hall door lock 4 and the rear hall door lock 5, the voltage signal between the first electrical detection point 1 and the first common terminal 3 is as shown in FIG. Figure 4 Specifically, if a short circuit occurs, during the T1 period, when the current is in the forward direction, the current cannot flow to the first common terminal 3 through the first diode 6, but since the second diode 7 is in the on state at this time, and a short circuit occurs between the front hall door lock 4 and the rear hall door lock 5, the current can flow to the rear hall door lock 5 through the short circuit line and then flow to the first common terminal 3 through the second diode 7. At this time, the voltage detection module 8 can detect that there is a forward voltage signal between the first electrical detection point 1 and the first common terminal 3, and the same applies to the T3 period.

[0048] Compared with the related art, the above-mentioned embodiment of the present application can obtain the voltage signal status of the front hall door lock by connecting the first electrical detection point and the first common end respectively through the voltage detection module, and can obtain the voltage signal status of the rear hall door lock by connecting the second electrical detection point and the first common end respectively through the voltage detection module. Through the voltage signal status of the front hall door lock and the voltage signal status of the rear hall door lock, it can be directly determined whether the front hall door lock and the rear hall door lock are short-circuited, so that after the short circuit is detected, the short circuit fault can be reported in time to improve the safety index of the elevator operation.

[0049] Another embodiment of the present application designs an elevator car door lock short circuit detection circuit, such as Figure 6 As shown, the technical concept of this embodiment is the same as that of the above embodiment. The elevator car door lock short circuit detection circuit of this embodiment includes: a third electrical detection point 9, a fourth electrical detection point 10, a second common terminal 11, a front car door lock 12, a third diode 13, a rear car door lock 14, a fourth diode 15 and a voltage detection module 8;

[0050] The fifth connection end of the front car door lock 12 is connected to the third electrical detection point 9, and the sixth connection end of the front car door lock 12 is connected to the second common end 11 after being connected in series with the third diode 13;

[0051] The seventh connection end of the rear car door lock 14 is connected to the fourth electrical detection point 10, and the eighth connection end of the rear car door lock 14 is connected in series with the fourth diode and then connected to the connection line connecting the third diode and the second common end through the second connection point; wherein the fourth diode and the third diode are connected to the circuit in opposite directions;

[0052] The voltage detection module 8 is connected to the third electrical detection point 9 , the fourth electrical detection point 10 and the second common end respectively, and is used to detect the voltage signals of the front car door lock 12 and the rear car door lock 14 respectively.

[0053] In one example, the sixth connection end of the front car door lock 12 is connected in series with the third diode and then connected to the second common end, including: the sixth connection end of the front car door lock 12 is connected to the positive electrode of the third diode, and the negative electrode of the third diode is connected to the second common end.

[0054] Correspondingly, the eighth connection end of the rear car door lock 14 is connected in series with the fourth diode, including: the eighth connection end of the rear car door lock 14 is connected to the cathode of the fourth diode, and the anode of the fourth diode is connected to the second connection point.

[0055] In another example, the sixth connection end of the front car door lock 12 is connected in series with the third diode and then connected to the second common end, including: the sixth connection end of the front car door lock 12 is connected to the cathode of the third diode, and the anode of the third diode is connected to the second common end.

[0056] Correspondingly, the eighth connection end of the rear car door lock 14 is connected in series with the fourth diode, including: the eighth connection end of the rear car door lock 14 is connected to the anode of the fourth diode, and the cathode of the fourth diode is connected to the second connection point.

[0057] It is not difficult to see that the concept of this embodiment is the same as that of the previous embodiment. The third electrical detection point 9, the fourth electrical detection point 10, and the second common terminal 11 in this embodiment can correspond to the first electrical detection point 1, the second electrical detection point 2, and the first common terminal 3 in the previous embodiment respectively; the front car door lock 12 and the rear car door lock 14 are equivalent replacements for the front hall door lock 4 and the rear hall door lock 5; the third diode 13 and the fourth diode 15 can correspond to the first diode 6 and the second diode 7 in the previous embodiment respectively. On this basis, various details in the above embodiments can be applied to this embodiment, and there is no difference in the application conditions. Therefore, the technical details of this embodiment have been recorded in the above embodiments, and this application will not repeat them. It can be understood by ordinary technicians in this field that the above embodiments are specific embodiments for implementing this application, and in actual applications, various changes can be made to them in form and details without departing from the spirit and scope of this application.

Claims

1. An elevator hall door lock short circuit detection circuit, characterized in that: include: A first electrical detection point, a second electrical detection point, a first common terminal, a front hall door lock, a rear hall door lock, a first diode, a second diode, and a voltage detection module; The first connection end of the front hall door lock is connected to the first electrical detection point, and the second connection end of the front hall door lock is connected to the first common end after being connected in series with the first diode; The third connection end of the rear hall door lock is connected to the second electrical detection point, and the fourth connection end of the rear hall door lock is connected in series with the second diode and then connected to the connection line connecting the first diode and the first common end through the first connection point; wherein the conduction direction of the second diode and the first diode connected to the circuit is opposite; The voltage detection module is connected to the first electrical detection point, the second electrical detection point and the first common end respectively, and is used to detect voltage signals of the front hall door lock and the rear hall door lock respectively.

2. The elevator hall door lock short circuit detection circuit according to claim 1, characterized in that: The second connection end of the front hall door lock is connected in series with the first diode and then connected to the first common end, including: The second connecting end of the front hall door lock is connected to the anode of the first diode, and the cathode of the first diode is connected to the first common end.

3. The elevator hall door lock short circuit detection circuit according to claim 2, characterized in that: The fourth connection end of the rear hall door lock is connected in series with the second diode, comprising: The fourth connection end of the rear hall door lock is connected to the cathode of the second diode, and the anode of the second diode is connected to the first connection point.

4. The elevator hall door lock short circuit detection circuit according to claim 1, characterized in that: The second connection end of the front hall door lock is connected in series with the first diode and then connected to the first common end, including: The second connecting end of the front hall door lock is connected to the cathode of the first diode, and the anode of the first diode is connected to the first common end.

5. The elevator hall door lock short circuit detection circuit according to claim 4, characterized in that: The fourth connection end of the rear hall door lock is connected in series with the second diode, comprising: The fourth connection end of the rear hall door lock is connected to the anode of the second diode, and the cathode of the second diode is connected to the first connection point.

6. An elevator car door lock short circuit detection circuit, characterized in that: include: a third electrical detection point, a fourth electrical detection point, a second common terminal, a front car door lock, a rear car door lock, a third diode, a fourth diode, and a voltage detection module; The fifth connection end of the front car door lock is connected to the third electrical detection point, and the sixth connection end of the front car door lock is connected to the second common end after being connected in series with the third diode; The seventh connection end of the rear car door lock is connected to the fourth electrical detection point, and the eighth connection end of the rear car door lock is connected in series with the fourth diode and then connected to the connection line connecting the third diode and the second common end through the second connection point; wherein the fourth diode and the third diode are connected to the circuit in opposite directions; The voltage detection module is connected to the third electrical detection point, the fourth electrical detection point and the second common end respectively, and is used to detect voltage signals of the front car door lock and the rear car door lock respectively.

7. The elevator car door lock short circuit detection circuit according to claim 6, characterized in that: The sixth connection end of the front car door lock is connected in series with the third diode and then connected to the second common end, comprising: The sixth connection end of the front car door lock is connected to the anode of the third diode, and the cathode of the third diode is connected to the second common end.

8. The elevator car door lock short circuit detection circuit according to claim 7, characterized in that: The eighth connection end of the rear car door lock is connected in series with the fourth diode, comprising: The eighth connection end of the rear car door lock is connected to the cathode of the fourth diode, and the anode of the fourth diode is connected to the second connection point.

9. The elevator car door lock short circuit detection circuit according to claim 6, characterized in that: The sixth connection end of the front car door lock is connected in series with the third diode and then connected to the second common end, comprising: The sixth connection end of the front car door lock is connected to the cathode of the third diode, and the anode of the third diode is connected to the second common end.

10. The elevator car door lock short circuit detection circuit according to claim 9, characterized in that: The eighth connection end of the rear car door lock is connected in series with the fourth diode, comprising: The eighth connection end of the rear car door lock is connected to the anode of the fourth diode, and the cathode of the fourth diode is connected to the second connection point.

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