Device and method for monitoring state of hall car door loop and elevator system
By designing a device for monitoring the circuit status of the elevator system, the circuit structure and control logic are simplified by the selection unit and the processing unit, the problems of high equipment complexity and cost in the prior art are solved, and higher reliability and lower costs are achieved.
Patent Information
- Application Number
- CN202311069400.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-08-23
- Publication Date
- 2025-02-25
AI Technical Summary
In the existing elevator system, the device monitoring the circuit status of the hall door requires a large number of relays, resulting in complex circuit structure and control logic, reducing reliability and increasing costs.
A device for monitoring the state of the door circuit of the hall is designed, including a selection unit and a processing unit. The selection unit couples the power supply and the door lock switch through two connection states, and the processing unit determines whether the function of the door lock switch is normal based on the level signal.
The device simplifies the circuit structure and control logic, improves the reliability of the system, and reduces costs. It can effectively monitor the circuit status of the hall door and avoids incorrect elevator control signals.
Smart Images
Figure CN119503565A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to elevator technology, and more particularly to a device and method for monitoring the state of a hall car door loop, an elevator system including the device, and a non-transitory computer-readable storage medium for implementing the method. Background Art
[0002] The elevator system usually includes a car door lock switch and a plurality of hall door lock switches, wherein the car door lock switch is installed at the car, and the number of the car door lock switches is usually determined by the number of car doors, and each hall door lock switch is installed at the corresponding hall door. These switches are coupled in series to form a hall car door loop. When the car is in motion, the car door lock switch and the hall door lock switch are in a closed state; when the car stops at a floor and the hall door and car door are opened, the car door lock switch and the hall door lock switch of the corresponding floor are in an open state. However, if these door lock switches are still in a closed state when the car stops at a floor or the hall car door is opened due to a fault, an erroneous elevator control signal may be generated, thereby causing a safety accident. Therefore, it is necessary to provide a monitoring device in the elevator system to promptly detect abnormalities in the door lock switch function. However, the existing monitoring device needs to be equipped with a large number of relays for the car door lock switch and the hall door lock switch, which on the one hand leads to the complexity of the circuit structure and control logic and the reduction of reliability, and on the other hand also increases the cost. Summary of the invention
[0003] According to one aspect of the present application, a device for monitoring the state of a hall-car door circuit is provided, wherein the hall-car door circuit comprises a first hall door lock switch, a second hall door lock switch, a first car door lock switch and a second car door lock switch which are sequentially coupled in series, and the device comprises:
[0004] a selection unit configured to couple the first hall door lock switch and the second car door lock switch to a power source in a first connection state, and to couple the second hall door lock switch and the first car door lock switch to the power source in a second connection state; and
[0005] A processing unit coupled to the selection unit is configured to place the selection unit in the first connection state or the second connection state, and when the hall door or the car door is opened, based on the first connection state and the second connection state, a first level signal at the common contact point of the first hall door lock switch and the second hall door lock switch and a second level signal at the common contact point of the first car door lock switch and the second car door lock switch determine whether the functions of the first hall door lock switch, the second hall door lock switch, the first car door lock switch and the second car door lock switch are normal.
[0006] Optionally, in the above device, the selection unit includes:
[0007] a first contact switch coupled between the power source and the second door lock switch and configured to be closed in the first connection state and open in the second connection state; and
[0008] A second contact switch linked to the first contact switch is coupled between the power supply and a common contact of the second hall door lock switch and the first car door lock switch and is configured to be opened in the first connection state and closed in the second connection state.
[0009] Further optionally, in the above-mentioned device, the selection unit also includes a third contact switch linked to the first contact switch, the third contact switch is coupled between the power supply and the processing unit and is configured to be closed in the first connection state and open in the second connection state, and the processing unit is configured to determine whether the selection unit can work normally based on the level at the third contact switch in the first connection state.
[0010] Further optionally, in the above device, the processing unit is configured to determine whether the functions of the first hall door lock switch and the second car door lock switch are normal in the following manner:
[0011] In the first connection state, if the first level signal is at a high level, it is determined that the function of the first hall door lock switch is abnormal; otherwise, it is determined that the function of the first hall door lock switch is normal; and
[0012] In the first connection state, if the second level signal is at a high level, it is determined that the function of the second car door lock switch is abnormal; otherwise, it is determined that the function of the second car door lock switch is normal.
[0013] Still further optionally, in the above device, the processing unit is configured to determine whether the functions of the second hall door lock switch and the first car door lock switch are normal in the following manner:
[0014] If it is determined that the first hall door lock switch and the second car door lock switch function normally, placing the selection unit in the second connection state;
[0015] In the second connection state, if the first level signal is at a high level, it is determined that the function of the second hall door lock switch is abnormal; otherwise, it is determined that the function of the second hall door lock switch is normal; and
[0016] In the second connection state, if the second level signal is at a high level, it is determined that the function of the first car door lock switch is abnormal; otherwise, it is determined that the function of the first car door lock switch is normal.
[0017] According to another aspect of the present application, there is also provided an elevator system, comprising:
[0018] A hall-car door circuit, comprising a first hall door lock switch, a second hall door lock switch, a first car door lock switch and a second car door lock switch, which are sequentially coupled in series;
[0019] Safety devices, including:
[0020] The selection unit is configured to couple the first hall door lock switch and the second car door lock switch to a power source in a first connection state, and in a second connection state,
[0021] coupling the second hall door lock switch and the first car door lock switch to the power supply; and
[0022] A processing unit coupled to the selection unit is configured to place the selection unit in the first connection state or the second connection state, and when the hall door or the car door is opened, based on the first connection state and the second connection state, a first level signal at the common contact point of the first hall door lock switch and the second hall door lock switch and a second level signal at the common contact point of the first car door lock switch and the second car door lock switch determine whether the functions of the first hall door lock switch, the second hall door lock switch, the first car door lock switch and the second car door lock switch are normal.
[0023] According to another aspect of the present application, a method for monitoring the state of a hall door circuit using the above device is provided, comprising the following steps performed when the hall door or the car door is opened:
[0024] In the first connection state, determining whether the functions of the first hall door lock switch and the second car door lock switch are normal based on the first level signal and the second level signal;
[0025] If it is determined that the first hall door lock switch and the second car door lock switch function normally, placing the selection unit in the second connection state;
[0026] In the second connection state, it is determined whether the functions of the second hall door lock switch and the first car door lock switch are normal based on the first level signal and the second level signal.
[0027] According to another aspect of the present application, a non-transitory computer-readable storage medium is provided, wherein instructions are stored in the computer-readable storage medium. When the instructions are executed by a microcontroller, the microcontroller executes the above method. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] The above and / or other aspects and advantages of the present application will become clearer and easier to understand through the following description of various aspects in conjunction with the accompanying drawings, in which the same or similar units are represented by the same reference numerals. The accompanying drawings include:
[0029] Figure 1 Schematic diagram of a device for monitoring the status of a hall-car door circuit according to some embodiments of the present application.
[0030] Figure 2A and 2B They are Figure 1 Schematic diagram of the connection relationship of the device in the first and second connection states.
[0031] Figure 3 To be used to implement Figure 1 Schematic diagram of the device showing the function of the selection unit.
[0032] Figure 4 To be used to implement Figure 1 Schematic diagram of the control device of the processing unit shown.
[0033] Figure 5 The figure is a flow chart of a method for monitoring the state of a hall-car door circuit according to some other embodiments of the present application. DETAILED DESCRIPTION
[0034] The present application is described more fully below with reference to the accompanying drawings in which illustrative embodiments of the present application are illustrated. However, the present application may be implemented in different forms and should not be interpreted as being limited to the embodiments given herein. The above embodiments are given to make the disclosure herein comprehensive and complete, so as to more fully convey the scope of protection of the present application to those skilled in the art.
[0035] In this specification, terms such as "comprise" and "include" indicate that in addition to the units and steps directly and explicitly stated in the specification and claims, the technical solution of the present application does not exclude the situation where there are other units and steps that are not directly or explicitly stated.
[0036] Unless otherwise specified, terms such as "first" and "second" do not indicate the order of the units in terms of time, space, size, etc., but are merely used to distinguish the units.
[0037] In this specification, a "contact switch" refers to a switch element that uses conductive contacts to open or close a circuit, interrupt current, or allow current to flow to other circuits.
[0038] Figure 1 Schematic diagram of a device for monitoring the state of a hall car door circuit according to some embodiments of the present application. Figure 1The monitored hall car door circuit L includes the first hall door lock switch DS1~DS n , Second hall door lock switch RDS1~RDS n , the first car door lock switch GS and the second car door lock switch RGS, these switches are coupled together in series. In some examples, the first hall door lock switches DS1 to DS n Used as the hall door lock switch equipped for the front hall door, the second hall door lock switch RDS1~RDS n The first car door lock switch GS is used as a car door lock switch provided for the rear car door, and the second car door lock switch RGS is used as a car door lock switch provided for the rear car door.
[0039] It should be noted that the number of first and second hall door lock switches usually depends on the number of floors, and the number of car door lock switches depends on the number of car doors. Figure 1 The order of the door lock switches in the hall-car door circuit L shown is only exemplary. The first hall door lock switches DS1 to DS n With the second hall door lock switch RDS1~RDS n The positions of the first car door lock switch GS and the second car door lock switch RGS can be interchanged.
[0040] Continue to see Figure 1 The device 10 for monitoring the state of the hall-car door circuit includes a selection unit 110 and a processing unit 120. The selection unit 110 is connected to the hall-car door circuit L. Figure 1 In the example shown, one end of the selection unit 110 is coupled to the (AC or DC) power supply V, and the other end can be selectively coupled to the second car door lock switch RGS (shown by a solid line), or coupled to the second hall door lock switch RDS n A common point A between the first car door lock switch GS (shown by a dot-dash line).
[0041] The selection unit 110 has a first connection state and a second connection state. In the first connection state, Figure 2A As shown, the selection unit 110 couples the second car door lock switch RGS with the power supply V, thereby coupling the first hall door lock switch DS1 and the second car door lock switch RGS to or in parallel with the power supply V; in the second connection state, as Figure 2B As shown, the selection unit 110 makes the power supply V and the second hall door lock switch RDS n The common contact A of the first car door lock switch GS is coupled, that is, the second hall door lock switch RDS n It is connected to the power supply V in parallel with the first car door lock switch GS.
[0042] The processing unit 120 is coupled to the selection unit 110 and is configured to control the connection state of the selection unit 110 when the car stops at a floor or the hall door and the car door are opened, for example, Figure 1 As shown, the processing unit 120 controls the selection unit 110 through the control signal CTRL to make the latter in the first connection state or the second connection state. On the other hand, the processing unit 120 also receives the first hall door lock switch DS1 to DS n With the second hall door lock switch RDS1~RDS n Between (that is, hall door lock switch DS n The first hall door lock switch DS1 to DS2 is determined based on the level signals DS_CHECK and GS_CHECK. n , Second hall door lock switch RDS1~RDS n , whether the functions of the first car door lock switch GS and the second car door lock switch RGS are normal.
[0043] The following is with the help of Figure 2A and 2B Describe the judgment logic of whether the door lock switch is working normally or not.
[0044] exist Figure 2A In the first connection state shown, the first hall door lock switch DS1 and the second car door lock switch RGS are coupled to or connected in parallel to the power supply V. If the car is parked at a floor or the hall door and car door are open, the car door lock switch and the hall door lock switch of the corresponding floor should be in the disconnected state. At this time, the hall car door loop L is in the open state, so the level signals DS_CHECK and GS_CHECK are in the low level state. If the first hall door lock switch of the corresponding floor (assuming that the first hall door lock switch DS i , 1≤i≤n) fails to disconnect normally, the level signal DS_CHECK will be in a high level state, so it can be judged that the first hall door lock switch DS m Similarly, if the second car door lock switch RGS fails to disconnect normally, the level signal GS_CHECK will be in a high level state, so it can be determined that the second car door lock switch RGS is abnormal in function.
[0045] exist Figure 2B In the second connection state shown, the second hall door lock switch RDS nThe first car door lock switch GS is connected to the power supply V through the common contact A. If the car stops at a floor or the hall door and car door are open, the car door lock switch and the hall door lock switch of the corresponding floor should be in the disconnected state. At this time, the hall car door circuit L is in the open circuit state, so the level signals DS_CHECK and GS_CHECK are in the low level state. If the second hall door lock switch of the corresponding floor (assuming that the second hall door lock switch RDS j , 1≤j≤n) fails to disconnect normally, the level signal DS_CHECK will be in a high level state, so it can be judged that the second hall door lock switch RDS j Similarly, if the first car door lock switch GS fails to open normally, the level signal GS_CHECK will be in a high level state, so it can be determined that the first car door lock switch GS is abnormal in function.
[0046] In some embodiments, the processing unit 120 is further configured to have a detection function for the selection unit 110, for example, Figure 1 As shown, the processing unit 120 can determine whether the function of the selection unit is normal based on the state signal MSDM from the selection unit 110 .
[0047] Figure 1 The selection unit 110 shown can be implemented using a relay including a plurality of linked contact switches. Figure 3 is a schematic diagram of a device (such as a relay) that can be used to implement the function of the above-mentioned selection unit.
[0048] See also Figure 3 The selection unit 110 includes a first contact switch (including contacts C-1 and C-2), a second contact switch (including contacts C-1 and C-2'), and a third contact switch (including contacts C3 and C4). One of the contacts C-1 of the first contact switch and the second contact switch is coupled to the power supply V, the other contact C-2 of the first contact switch is coupled to the second car door lock switch RGS, and the other contact C-2' of the second contact switch is coupled to the second hall door lock switch RDS. n And the common contact A of the first car door lock switch GS.
[0049] The first contact switch is configured to be closed in a first connection state and open in a second connection state, so that the second door lock switch RGS is coupled to the power source V in the first connection state. Exemplarily, the first contact switch may be a normally closed contact switch.
[0050] The second contact switch is configured to be linked with the first contact switch, that is, to be opened in the first connection state and closed in the second connection state, so that the second hall door lock switch RDS nThe common point A of the first car door lock switch GS and the second contact switch is coupled to the power supply V in the second connection state. Exemplarily, the second contact switch is a normally open contact switch.
[0051] One of the contacts C-3 of the third contact switch is coupled to the DC power supply DC, and the other contact C4 is coupled to the processing unit 120. The third contact switch is configured to be linked with the first contact switch, that is, closed in the first connection state and opened in the second connection state. Exemplarily, the third contact switch can be a normally closed contact switch.
[0052] In the first connection state, the processing unit 120 can determine whether the function of the selection unit 110 is normal based on the level signal MSDM at the contact C4. Specifically, in the first connection state, if the level signal MSDM is in a high level state, it can be determined that the function of the selection unit 110 is normal, otherwise, it can be determined that the function of the selection unit 110 is abnormal.
[0053] Continue to see Figure 3 , the processing unit 120 can control the on and off of the second contact switch through the control signal CTRL, and control the on and off of the first contact switch and the third contact switch by means of the linkage mechanism. Exemplarily, when the processing unit 120 applies the control signal CTRL to the control end of the relay, the second contact switch as a normally open contact switch is energized, and the first contact switch and the third contact switch as normally closed contact switches are disconnected.
[0054] Figure 1 The processing unit 120 shown may utilize Figure 4 The control device shown is implemented. Figure 4 As shown, the control device 40 includes a memory 410 (eg, a non-volatile memory such as a flash memory, a ROM, a hard disk drive, a magnetic disk, an optical disk, etc.), a microcontroller 420 , and a computer program 430 stored in the memory 410 and executable on the microcontroller 420 .
[0055] Figure 4 The microcontroller 420 in the embodiment may include a port group for communicating with an external device. For example, the port group includes a port coupled to the common points B and C to obtain the level signals DS_CHECK and GS_CHECK, a port coupled to the control end of the selection unit 110 to apply the control signal CTRL, and a port coupled to the state output end of the selection unit 110 to receive the state signal MSDM.
[0056] exist Figure 4In the control device shown, the memory 410 stores a computer program 430 executable by the microcontroller 420. The microcontroller 420 can be configured to execute the computer program 430 to implement the various functions of the processing unit described above (for example, including but not limited to the control of the connection state of the selection unit, the judgment of whether the hall door lock switch and the car door lock switch function normally, and the judgment of whether the selection unit function is normal or not).
[0057] Figure 5 1 is a flow chart of a method for monitoring the state of a hall car door circuit according to some other embodiments of the present application. For example, Figure 5 The method shown uses Figure 1 The device shown is implemented.
[0058] Figure 5 The method shown includes the following steps:
[0059] Step 501: Determine whether the hall door and the car door are opened at the same floor at the same time. If they are opened at the same time, go to step 502, otherwise go to step 502'.
[0060] Step 502: Under the control of the processing unit 120, the selection unit 110 enters the first connection state. Exemplarily, the processing unit 120 puts the selection unit 110 in the first connection state, for example, by deactivating the control signal CTRL.
[0061] Step 503: The processing unit 120 determines whether the function of the selection unit 110 is normal. If it is normal, the process proceeds to step 504, otherwise, the process exits.
[0062] Step 504: The processing unit 120 obtains a first level signal and a second level signal in a first connection state.
[0063] Step 505: The processing unit 120 determines the first hall door lock switch (eg, DS i ) and whether the functions of the second car door lock switch RGS are normal. If it is judged that the functions are normal, the process proceeds to step 506, otherwise, the process proceeds to step 506'.
[0064] Step 506: Under the control of the processing unit 120, the selection unit 110 enters the second connection state.
[0065] Step 506 ′: the processing unit 120 generates a message indicating that the function of the first hall door lock switch or the second car door lock switch is abnormal and then exits the processing flow.
[0066] Step 507: The processing unit 120 obtains the first level signal and the second level signal in the second connection state.
[0067] Step 508: The processing unit 120 determines the second hall door lock switch (e.g., RDS j ) and the first car door lock switch GS function is normal. If the function is judged to be normal, the processing flow ends, otherwise it goes to step 506'.
[0068] In steps 505 and 508, the specific judgment logic on whether the door lock switch functions normally has been described in detail above and will not be repeated here.
[0069] Another branch after step 501 is described below.
[0070] Step 502 ′: under the control of the processing unit 120 , the selection unit 110 enters the first connection state.
[0071] Step 503 ′: the processing unit 120 determines whether the function of the selection unit 110 is normal. If it is normal, the process proceeds to step 504 ′; otherwise, the process exits.
[0072] Step 504': The processing unit 120 determines the first hall door lock switch DS based on the judgment logic of the single door opening situation (for example, only one of the car doors and the corresponding hall door are opened) according to the first level signal and the second level signal in the first connection state. i And whether the function of the first car door lock switch GS is normal or not.
[0073] According to another aspect of the present application, a non-transitory computer-readable storage medium is provided, on which a computer program is stored. When the program is executed by a microcontroller, the method described above with reference to the drawings can be implemented.
[0074] The computer-readable storage medium referred to in this application includes various types of computer storage media, which can be any available medium that a general or special-purpose computer can access. For example, a computer-readable storage medium can include RAM, ROM, EPROM, E2PROM, register, hard disk, removable disk, CD-ROM or other optical disk storage, disk storage or other magnetic storage device, or can be used to carry or store a desired program code unit with an instruction or data structure form and can be accessed by a general or special-purpose computer, or a general or special-purpose processor. Any other temporary or non-temporary medium. As used herein, the disk usually copies data magnetically, while the dish uses a laser to optically copy data. The above combination should also be included in the protection scope of the computer-readable storage medium. The exemplary storage medium is coupled to the processor so that the processor can read and write information from / to the storage medium. In an alternative, the storage medium can be integrated into the processor. The processor and the storage medium can reside in the ASIC. The ASIC can reside in the user terminal. In an alternative, the processor and the storage medium can reside in the user terminal as discrete components.
[0075] Those skilled in the art will appreciate that the various illustrative logical blocks, modules, circuits, and algorithm steps described herein may be implemented as electronic hardware, computer software, or a combination of both.
[0076] In order to show the interchangeability between hardware and software, various schematic components, blocks, modules, circuits and steps are generally described above according to their functionality. Such functionality is implemented in hardware form or software form depending on the specific application and the design restrictions imposed on the overall system. Those skilled in the art can implement the described functionality in a variable manner for specific specific applications, but such implementation decisions should not be understood as causing deviations from the scope of the present application.
[0077] Although only some of the specific embodiments of the present application are described, it should be understood by those skilled in the art that the present application can be implemented in many other forms without departing from its subject matter and scope. Therefore, the examples and embodiments shown are considered to be illustrative rather than restrictive, and the present application may include various modifications and substitutions without departing from the spirit and scope of the present application as defined in the appended claims.
[0078] The embodiments and examples set forth herein are provided to best illustrate embodiments according to the present technology and its specific applications, and thereby enable those skilled in the art to implement and use the present application. However, those skilled in the art will appreciate that the above description and examples are provided only for ease of illustration and example. The description set forth is not intended to cover all aspects of the present application or to limit the present application to the precise form disclosed.
Claims
1. A device for monitoring the state of a hall-car door circuit, wherein the hall-car door circuit comprises a first hall door lock switch, a second hall door lock switch, a first car door lock switch and a second car door lock switch which are sequentially coupled in series, characterized in that: The device comprises: a selection unit configured to couple the first hall door lock switch and the second car door lock switch to a power source in a first connection state, and to couple the second hall door lock switch and the first car door lock switch to the power source in a second connection state; and A processing unit coupled to the selection unit is configured to place the selection unit in the first connection state or the second connection state, and when the hall door or the car door is opened, based on the first connection state and the second connection state, a first level signal at the common contact point of the first hall door lock switch and the second hall door lock switch and a second level signal at the common contact point of the first car door lock switch and the second car door lock switch determine whether the functions of the first hall door lock switch, the second hall door lock switch, the first car door lock switch and the second car door lock switch are normal.
2. The device according to claim 1, wherein: The selection unit comprises: a first contact switch coupled between the power source and the second car door lock switch and configured to be closed in the first connection state and open in the second connection state; as well as A second contact switch linked to the first contact switch is coupled between the power supply and a common contact of the second hall door lock switch and the first car door lock switch and is configured to be opened in the first connection state and closed in the second connection state.
3. The device as claimed in claim 2, wherein: The selection unit also includes a third contact switch linked to the first contact switch, the third contact switch is coupled between the power supply and the processing unit and is configured to be closed in the first connection state and open in the second connection state, and the processing unit is configured to determine whether the selection unit can work normally based on the level at the third contact switch in the first connection state.
4. The device according to claim 2, wherein: The processing unit is configured to determine whether the functions of the first hall door lock switch and the second car door lock switch are normal in the following manner: In the first connection state, if the first level signal is at a high level, it is determined that the function of the first hall door lock switch is abnormal; otherwise, it is determined that the function of the first hall door lock switch is normal; as well as In the first connection state, if the second level signal is at a high level, it is determined that the function of the second car door lock switch is abnormal; otherwise, it is determined that the function of the second car door lock switch is normal.
5. The device according to claim 4, wherein: The processing unit is configured to determine whether the functions of the second hall door lock switch and the first car door lock switch are normal in the following manner: If it is determined that the first hall door lock switch and the second car door lock switch function normally, placing the selection unit in the second connection state; In the second connection state, if the first level signal is at a high level, it is determined that the function of the second hall door lock switch is abnormal, otherwise, it is determined that the function of the second hall door lock switch is normal; as well as In the second connection state, if the second level signal is at a high level, it is determined that the function of the first car door lock switch is abnormal; otherwise, it is determined that the function of the first car door lock switch is normal.
6. An elevator system, comprising: A hall-car door circuit, comprising a first hall door lock switch, a second hall door lock switch, a first car door lock switch and a second car door lock switch, which are sequentially coupled in series; Safety devices, including: a selection unit configured to couple the first hall door lock switch and the second car door lock switch to a power source in a first connection state, and to couple the second hall door lock switch and the first car door lock switch to the power source in a second connection state; as well as A processing unit coupled to the selection unit is configured to place the selection unit in the first connection state or the second connection state, and when the hall door or the car door is opened, based on the first connection state and the second connection state, a first level signal at the common contact point of the first hall door lock switch and the second hall door lock switch and a second level signal at the common contact point of the first car door lock switch and the second car door lock switch determine whether the functions of the first hall door lock switch, the second hall door lock switch, the first car door lock switch and the second car door lock switch are normal.
7. The elevator system according to claim 6, wherein: The selection unit comprises: a first contact switch coupled between the power source and the second car door lock switch and configured to be closed in the first connection state and open in the second connection state; as well as A second contact switch linked to the first contact switch is coupled between the power supply and a common contact of the second hall door lock switch and the first car door lock switch and is configured to be opened in the first connection state and closed in the second connection state.
8. The elevator system according to claim 7, wherein: The selection unit also includes a third contact switch linked to the first contact switch, the third contact switch is coupled between the power supply and the processing unit and is configured to be closed in the first connection state and open in the second connection state, and the processing unit is configured to determine whether the selection unit can work normally based on the level at the third contact switch in the first connection state.
9. The elevator system according to claim 6, wherein: The processing unit is configured to determine whether the functions of the first hall door lock switch and the second car door lock switch are normal in the following manner: In the first connection state, if the first level signal is at a high level, it is determined that the function of the first hall door lock switch is abnormal; otherwise, it is determined that the function of the first hall door lock switch is normal; as well as In the first connection state, if the second level signal is at a high level, it is determined that the function of the second car door lock switch is abnormal; otherwise, it is determined that the function of the second car door lock switch is normal.
10. The elevator system according to claim 9, wherein: The processing unit is configured to determine whether the functions of the second hall door lock switch and the first car door lock switch are normal in the following manner: If it is determined that the first hall door lock switch and the second car door lock switch function normally, placing the selection unit in the second connection state; In the second connection state, if the first level signal is at a high level, it is determined that the function of the second hall door lock switch is abnormal, otherwise, it is determined that the function of the second hall door lock switch is normal; as well as In the second connection state, if the second level signal is at a high level, it is determined that the function of the first car door lock switch is abnormal; otherwise, it is determined that the function of the first car door lock switch is normal.
11. A method for monitoring the state of a hall-car door circuit using the device as claimed in claim 1, characterized in that: Includes the following steps to be performed when the hall door or car door is opened: In the first connection state, determining whether the functions of the first hall door lock switch and the second car door lock switch are normal based on the first level signal and the second level signal; If it is determined that the first hall door lock switch and the second car door lock switch function normally, placing the selection unit in the second connection state; In the second connection state, it is determined whether the functions of the second hall door lock switch and the first car door lock switch are normal based on the first level signal and the second level signal.
12. The method of claim 11, wherein: The selection unit includes: a first contact switch coupled between the power source and the second car door lock switch and configured to be closed in the first connection state and open in the second connection state; and a second contact switch linked to the first contact switch, coupled between the power supply and a common contact of the second hall door lock switch and the first car door lock switch and configured to be opened in the first connection state and closed in the second connection state; a third contact switch linked to the first contact switch, the third contact switch being coupled between the power supply and the processing unit and being configured to be closed in the first connection state and open in the second connection state, The method further includes: in the first connection state, determining whether the selection unit can work normally based on the level at the third contact switch.
13. A non-transitory computer-readable storage medium having instructions stored therein, characterized in that: When the instructions are executed by a microcontroller, the microcontroller executes the method according to claim 11 or 12.