Floor address automatic setting circuit and method, and elevator

Abstract

Disclosed in the present application are a floor address automatic setting circuit and method, and an elevator. The floor address automatic setting circuit comprises a main control module, a plurality of cable modules, a plurality of hall-call panel modules, and a voltage measurement module, wherein each hall-call panel module comprises a branch unit and a load unit which are connected in parallel, and when the branch unit is connected, a branch current is superimposed on a load current of the load unit, such that an input current of the hall-call panel module increases, so as to increase the voltage drop of a front-end cable module, thus increasing the voltage difference between two adjacent hall-call panel modules; and the voltage measurement module measures input voltages of the plurality of hall-call panel modules, and the main control module determines, on the basis of the input voltages, floors where the hall-call panel modules are located, so as to perform floor address setting.

Description

Circuit, method and elevator for automatically setting floor address

[0001] Related applications

[0002] This application claims priority to Chinese patent application No. 202311617969.9 filed on November 29, 2023, the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to the field of elevator control technology, and in particular to a circuit and method for automatically setting a floor address, and an elevator. Background Art

[0004] Elevators require floor addresses so that when a floor call is received, the elevator can identify the floor and travel to the target floor to pick up passengers. Traditional elevator floor addressing methods are gradually being phased out due to labor and cable costs.

[0005] Some solutions for automatically setting floor addresses have emerged in the related art. These utilize the characteristic that the input voltage of the hall call board varies depending on the floor's load, identifying the different floors and setting the floor address. However, due to the low impedance of the hall call board's load, the input voltage difference between the hall call boards on different floors is small, resulting in low floor recognition accuracy and, consequently, inaccurate floor address setting.

[0006] Summary of the Invention

[0007] The main purpose of this application is to provide a circuit, method and elevator for automatically setting floor addresses, aiming to solve the technical problem in related technologies that floor recognition accuracy is not high, resulting in low accuracy in floor address setting.

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

[0009] In a first aspect, the present application provides a floor address automatic setting circuit, comprising a main control module, multiple cable modules, multiple hall call board modules, and a voltage detection module, wherein the main control module is connected to a hall call board module via a cable module, two adjacent hall call board modules are connected via a cable module, and the voltage detection module is respectively connected to the multiple hall call board modules and the main control module;

[0010] Among them, each hall call board module includes a branch unit and a load unit connected in parallel, and the branch unit is connected to the cable module and the voltage detection module respectively;

[0011] When the branch unit is connected, a branch current is superimposed on the load current of the load unit, increasing the input current of the hall call board module, thereby increasing the voltage drop of the front-end cable module and increasing the voltage difference between two adjacent hall call board modules;

[0012] The voltage detection module is used to detect the input voltage of multiple hall call board modules. The main control module is used to determine the floor where each hall call board module is located based on the input voltage in order to set the floor address.

[0013] In one embodiment, in the above-mentioned floor address automatic setting circuit, the cable module includes a first inductor and a first resistor connected in series, and the branch unit includes:

[0014] The first branch is connected to the first resistor, the load unit, and the voltage detection module respectively. When the first branch is connected, it is used to superimpose the first branch current on the load current to increase the current of the front-end first resistor, thereby increasing the voltage drop of the front-end first resistor and increasing the voltage difference; or

[0015] The second branch is connected to the first resistor, the load unit and the voltage detection module respectively. The second branch is used to superimpose the second branch current on the load current when connected, so as to cause a current mutation in the front-end first inductor, thereby increasing the voltage drop of the front-end first inductor and increasing the voltage difference.

[0016] In one embodiment, in the above-mentioned automatic floor address setting circuit, the first branch includes a second resistor, a first capacitor, and a first switch tube connected in series, the input end of the second resistor and the output end of the first switch tube are respectively connected to the voltage detection module, and the control end of the first switch tube is connected to the main control module;

[0017] The first switch tube is used to be triggered to turn on according to the control signal output by the main control module. The first capacitor is used to be charged after the first switch tube is triggered to turn on, thereby increasing the current on the second resistor to obtain a first branch current, and superimposing it on the load current;

[0018] The voltage detection module is also used to detect the input voltage of the hall call board module to which the first branch belongs after a first preset time after the first switch tube is turned on, so that the main control module obtains the input voltage of all hall call board modules.

[0019] In one embodiment, in the above-mentioned automatic floor address setting circuit, the second branch includes a third resistor and a second switch tube connected in series, the input end of the third resistor and the output end of the second switch tube are respectively connected to the voltage detection module, and the control end of the second switch tube is connected to the main control module;

[0020] The second switch tube is used to trigger conduction according to the control signal output by the main control module, increase the current on the third resistor to obtain the second branch current, and superimpose it on the load current;

[0021] The voltage detection module is also used to detect the input voltage of the hall call board module to which the second branch belongs after a second preset time after the second switch tube is triggered to turn on and before the second switch tube completes conduction, so that the main control module obtains the input voltage of all hall call board modules.

[0022] In one embodiment, in the above-mentioned floor address automatic setting circuit, the control end of the second switch tube is connected to the main control module through a fourth resistor;

[0023] The conduction time length between the triggering and the completion of the conduction of the second switch tube is determined based on the resistance value of the fourth resistor, and the second preset time length is set based on the conduction time length.

[0024] In one embodiment, in the above-mentioned floor address automatic setting circuit, the voltage detection module includes a plurality of detection circuits and a plurality of signal processing circuits connected in a corresponding manner, the plurality of detection circuits are connected one-to-one with the plurality of hall call board modules, and the plurality of signal processing circuits are connected to the main control module;

[0025] The detection circuit is used to detect the input voltage of the corresponding hall call board module to obtain a detection signal. The signal processing circuit is used to enhance the received detection signal and output the processed detection signal to the main control module.

[0026] In one embodiment, in the above-mentioned floor address automatic setting circuit, the signal processing circuit includes an amplifier U1, a diode D1, and a diode D2;

[0027] The negative input terminal of the amplifier U1 is connected to the cathode of the diode D1 through the resistor R11, the positive input terminal of the amplifier U1 is connected to the cathode of the diode D2 through the resistor R12, the anode of the diode D1 and the anode of the diode D2 are both connected to the detection circuit, and the output terminal of the amplifier U1 is connected to the main control module.

[0028] In one embodiment, in the above-mentioned floor address automatic setting circuit, the cable module includes:

[0029] Segmented cable, one end of the segmented cable is connected to the main control module / hall call board module, and the other end of the segmented cable is connected to the hall call board module; or,

[0030] Main cable and branch cable, the main cable is connected to the main control module, one end of the branch cable is connected to the hall call board module, and the other end of the branch cable is connected to the main cable.

[0031] In a second aspect, the present application provides a method for automatically setting a floor address, which is applied to the above-mentioned automatic floor address setting circuit, and the method includes:

[0032] The main control module controls the access of the branch unit in the hall call board module;

[0033] A branch current is superimposed on the load current of the load unit in the hall call board module through the branch unit to increase the input current of the hall call board module, thereby increasing the voltage drop of the front-end cable module and increasing the voltage difference between two adjacent hall call board modules;

[0034] Detect the input voltage of multiple hall call board modules through the voltage detection module;

[0035] The main control module determines the floor where each hall call board module is located according to the input voltage to set the floor address.

[0036] In one embodiment, in the above-mentioned method for automatically setting the floor address, before the step of controlling the access of the branch unit in the hall call board module by the main control module, the method further includes:

[0037] Output communication signals to each hall call board module through the main control module, and receive feedback signals output by each hall call board module based on the communication signals;

[0038] Determine the number of hall call board modules according to the feedback signal and number each hall call board module;

[0039] The steps of controlling the access of the branch unit in the hall call board module through the main control module include:

[0040] The main control module controls the access of branch units in multiple hall call board modules in sequence based on preset rules and the numbers of each hall call board module;

[0041] The steps of determining the floor where each hall call board module is located according to the input voltage by the main control module to set the floor address include:

[0042] The main control module obtains the input voltages of all hall call board modules and sorts them according to the numbers and input voltages of the hall call board modules to obtain a sorted input voltage list.

[0043] Determine the floor where each hall call board module is located according to the input voltage list to assign an address to each hall call board module.

[0044] In one embodiment, in the above-mentioned method for automatically setting a floor address, the cable module includes a first inductor and a first resistor connected in series, and the branch unit includes a first branch or a second branch;

[0045] The steps of controlling the access of the branch unit in the hall call board module through the main control module include:

[0046] The main control module controls the first branch to be connected, so as to superimpose the first branch current on the load current, thereby increasing the current of the first resistor at the front end, increasing the voltage drop of the first resistor at the front end, and increasing the voltage difference; or

[0047] The main control module controls the access of the second branch to superimpose the second branch current on the load current, causing a current mutation in the front-end first inductor, increasing the voltage drop of the front-end first inductor, and increasing the voltage difference.

[0048] In one embodiment, in the above-mentioned method for automatically setting a floor address, the first branch includes a second resistor, a first capacitor, and a first switch tube connected in series, the input end of the second resistor and the output end of the first switch tube are respectively connected to the voltage detection module, and the control end of the first switch tube is connected to the main control module;

[0049] The steps of controlling the first branch to be connected by the main control module to superimpose the first branch current on the load current, thereby increasing the current of the first front-end resistor, increasing the voltage drop of the first front-end resistor, and increasing the voltage difference include:

[0050] Controlling the first switch tube to be triggered and turned on by the main control module;

[0051] After the first switch tube is triggered to turn on, the first capacitor is charged to increase the current on the second resistor to obtain a first branch current, which is superimposed on the load current;

[0052] The steps of detecting the input voltages of multiple hall call board modules by the voltage detection module include:

[0053] After a first preset time period after the first switch tube is turned on, the voltage detection module detects the input voltage of the hall call board module to which the first branch belongs, so that the main control module obtains the input voltage of all hall call board modules.

[0054] In one embodiment, in the above-mentioned method for automatically setting a floor address, the second branch includes a third resistor and a second switch tube connected in series, the input end of the third resistor and the output end of the second switch tube are respectively connected to the voltage detection module, and the control end of the second switch tube is connected to the main control module;

[0055] The steps of controlling the second branch to be connected by the main control module to superimpose the second branch current on the load current, causing a current mutation in the first inductor at the front end, increasing the voltage drop of the first inductor at the front end, and increasing the voltage difference include:

[0056] The main control module controls the second switch to be triggered and turned on, thereby increasing the current on the third resistor to obtain a second branch current, and superimposes the second branch current on the load current;

[0057] The steps of detecting the input voltages of multiple hall call board modules by the voltage detection module include:

[0058] The voltage detection module detects the input voltage of the hall call board module to which the second branch belongs after the second preset time after the second switch tube is triggered to turn on and before the second switch tube completes the conduction, so that the main control module obtains the input voltage of all hall call board modules.

[0059] In a third aspect, the present application provides an elevator, comprising:

[0060] Main control board;

[0061] Multiple hall call boards are set up on each floor;

[0062] Multiple interlayer cables for connecting the main control board and a hall call board or connecting two adjacent hall call boards; and

[0063] For example, in the above-mentioned automatic floor address setting circuit, the main control module corresponds to the main control board, the multiple hall call board modules correspond to the multiple hall call boards, and the multiple cable modules correspond to the multiple inter-floor cables.

[0064] The above one or more technical solutions provided by this application may have the following advantages or at least achieve the following technical effects:

[0065] The present application proposes a circuit, method, and elevator for automatically setting floor addresses. The circuit includes a main control module, multiple cable modules, multiple hall call board modules, and a voltage detection module. The voltage detection module detects the input voltages of the multiple hall call board modules, and the main control module determines the floor where each hall call board module is located based on the input voltage and sets the floor address, thereby achieving the purpose of automatically setting the floor address. Compared with traditional solutions, this reduces labor costs and does not require additional address lines specifically for setting addresses, thereby reducing cable costs. The hall call board module is further composed of a branch unit and a load unit connected in parallel. The branch unit is connected to the cable module and the voltage detection module respectively. When the branch unit is connected, a branch current is superimposed on the load current of the load unit, increasing the input current of the hall call board module, thereby increasing the voltage drop of the front-end cable module and increasing the voltage difference between two adjacent hall call board modules connected by a cable module. This allows the main control module to more clearly distinguish the floor where the hall call board module is located, improving the precision and accuracy of floor identification, thereby increasing the accuracy of subsequent floor address setting based on the identified floor. BRIEF DESCRIPTION OF THE DRAWINGS

[0066] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these provided drawings without any creative work.

[0067] FIG1 is a connection block diagram of a first embodiment of a circuit for automatically setting a floor address according to the present invention;

[0068] FIG2 is a detailed connection diagram of the hall call board module in FIG1;

[0069] FIG3 is a connection diagram of the first embodiment of the automatic floor address setting circuit of the present application and its equivalent circuit diagram;

[0070] FIG4 is a connection diagram and an equivalent circuit diagram of an implementation of the second embodiment of the circuit for automatically setting the floor address of the present application;

[0071] FIG5 is a diagram of the first branch current i in an embodiment of the second embodiment of the floor address automatic setting circuit of the present application. m_a Schematic diagram of the changing trend of

[0072] FIG6 is a schematic diagram of an equivalent circuit when the first branch of the mth floor is connected in one embodiment of the second embodiment of the circuit for automatically setting the floor address of the present application;

[0073] FIG7 is a schematic diagram of an equivalent circuit of the mth floor and the m-1th floor in an implementation of the second embodiment of the floor address automatic setting circuit of the present application;

[0074] FIG8 is a connection diagram and an equivalent circuit diagram of another implementation of the second embodiment of the circuit for automatically setting floor addresses of the present application;

[0075] FIG9 is a schematic diagram of an equivalent circuit when the second branch of the mth floor is connected in another embodiment of the second embodiment of the circuit for automatically setting floor addresses of the present application;

[0076] FIG10 is a diagram showing the turn-on voltage u of the second switch tube in another embodiment of the second embodiment of the floor address automatic setting circuit of the present application. GS and the second branch current i m_d Schematic diagram of the changes;

[0077] FIG11 is a schematic diagram of an equivalent circuit of the mth floor and the m-1th floor in another embodiment of the second embodiment of the circuit for automatically setting floor addresses of the present application;

[0078] FIG12 is a circuit schematic diagram of a signal processing circuit of the voltage detection module in FIG1 ;

[0079] FIG13 is a connection diagram and an equivalent circuit diagram of the third embodiment of the automatic floor address setting circuit of the present application;

[0080] FIG14 is a flow chart of the first embodiment of the method for automatically setting floor addresses of the present application.

[0081] The realization of the objectives, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0082] To make the purpose, technical solutions, and advantages of this application more clear, 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 of this application, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of this application.

[0083] It should be noted that, in this application, the terms "comprise," "include," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or system comprising a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or system. Without further limitation, the phrase "comprises..." does not preclude the presence of additional identical elements in the process, method, article, or system comprising such elements. In this application, unless otherwise expressly specified or limited, the terms "connected," "fixed," and the like are to be interpreted broadly. For example, "connected" can mean fixed, removable, or integral; mechanical or electrical; direct or indirect through an intermediary; internal communication between two elements; or the interaction between two elements. In this application, if references to "first," "second," or the like are used for descriptive purposes only, and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features being referenced. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the present application, the use of suffixes such as "module", "component" or "unit" to represent elements is only to facilitate the description of the present application and has no specific meaning in itself. Therefore, "module", "component" or "unit" can be used in a mixed manner. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances. In addition, the technical solutions of the various embodiments can be combined with each other, but this is based on the ability of those of ordinary skill in the art to implement them. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present application.

[0084] The elevator needs to set the floor address so that when there is a call for the elevator on a certain floor, the elevator can identify the floor and run to the target floor to pick up passengers.

[0085] Analysis of relevant technologies reveals that there are several traditional elevator floor address setting schemes:

[0086] 1. Manually set the address. When the operator reaches each floor, he / she sets a floor address command to the elevator hall call panel on each floor. The hall call panel then sends the floor address to the elevator main control panel, and the main control panel knows the target floor.

[0087] 2. Add address line settings. The elevator main control board outputs the top floor signal, which is transmitted to the top hall call board through the address line. The top hall call board knows its own floor and can subsequently send a signal to tell the main control board which floor it is on. The top hall call board then outputs the second-top floor signal to the second-top hall call board through the address line. The second-top hall call board knows its own floor and can subsequently send a signal to tell the main control board, and so on, to set the floor addresses of all floors. In other words, in this scheme, the main control board outputs the first floor signal, and then the hall call board on the upper floor outputs the next floor signal and transmits it to the hall call board on the lower floor through the address line. The hall call board on the lower floor can know its own floor and can subsequently send a signal to tell the main control board which floor it is on.

[0088] In the first solution, operators need to go to each floor to manually set the address, which is labor-intensive, labor-intensive, and inconvenient. In the second solution, the address needs to be set with the help of address lines between floors, which makes the shaft cables complicated and not simple enough, and also increases the cost of the shaft cables.

[0089] To reduce the labor and cable costs of setting floor addresses, some solutions for automatically setting floor addresses have emerged. For example, these solutions utilize the characteristic that the input voltage of the hall call board varies depending on the floor's load, identifying the different floors and setting the floor address. However, due to the low impedance of the hall call board's load, the input voltage of the hall call board varies little, resulting in low floor recognition accuracy and, consequently, inaccurate floor address setting. Furthermore, the detection accuracy of the hall call board's input voltage is also limited, further affecting the accuracy of floor address setting.

[0090] In view of the technical problem that the floor recognition accuracy in the related art is not high, resulting in low accuracy of floor address setting, the present application provides a circuit, method and elevator for automatically setting the floor address. Detailed description will be given below with reference to specific embodiments and implementation methods in conjunction with the accompanying drawings.

[0091] Example 1

[0092] 1 and 2 , a first embodiment of the floor address automatic setting circuit of the present application is proposed, and the floor address automatic setting circuit is applied to an elevator. The elevator comprises:

[0093] Main control board;

[0094] Multiple hall call boards are set up on each floor;

[0095] Multiple interlayer cables for connecting the main control board and a hall call board or connecting two adjacent hall call boards; and

[0096] Floor address automatic setting circuit.

[0097] In this embodiment, the main control board can be set in the machine room of the elevator, and can include an elevator controller or a power supply and an elevator controller. It can also be the background control center, control platform, etc. of the elevator. The hall call board can be set at each floor of the elevator, such as in the elevator call box set up on each floor. The inter-floor cables can be the communication control cables required for the operation of the elevator. For a multi-story elevator, the main control board is connected to the hall call board on the top floor through inter-floor cables, and the hall call board on the top floor is then connected to the hall call board on the second top floor through inter-floor cables, and so on. Finally, the hall call board on the second floor is connected to the hall call board on the first floor through inter-floor cables. The number of inter-floor cables and the number of hall call boards are consistent with the number of floors of the elevator.

[0098] Based on the above elevator, the floor address automatic setting circuit of this embodiment is described in detail below in combination with the connection block diagram shown in FIG1 and the detailed connection block diagram of the hall call board module shown in FIG2 .

[0099] The floor address automatic setting circuit may include a main control module, multiple cable modules, multiple hall call board modules and a voltage detection module. The main control module is connected to a hall call board module through a cable module, and two adjacent hall call board modules are connected through a cable module. The voltage detection module is respectively connected to the multiple hall call board modules and the main control module.

[0100] Among them, each hall call board module includes a branch unit and a load unit connected in parallel, and the branch unit is connected to the cable module and the voltage detection module respectively;

[0101] When the branch unit is connected, a branch current is superimposed on the load current of the load unit, increasing the input current of the hall call board module, thereby increasing the voltage drop of the front-end cable module and increasing the voltage difference between two adjacent hall call board modules;

[0102] The voltage detection module is used to detect the input voltage of multiple hall call board modules. The main control module is used to determine the floor where each hall call board module is located based on the input voltage in order to set the floor address.

[0103] The main control module corresponds to the elevator's main control panel, the multiple hall call board modules correspond to the elevator's multiple hall call boards, and the multiple cable modules correspond to the elevator's multiple inter-floor cables. The number of hall call board modules matches the number of cable modules, and both correspond to the number of elevator floors. The voltage detection module can be multiple detection units, connected to the multiple hall call board modules in a one-to-one correspondence. The voltage detection module sends the detected input voltages of the multiple hall call board modules to the main control module, allowing the main control module to obtain the corresponding input voltages of the multiple hall call board modules. In actual application, the voltage detection module can be installed in the elevator call box at each floor together with the hall call board module.

[0104] As shown in Figure 1, the main control module is connected to the first hall call board module through the first cable module, and the first hall call board module is connected to the second hall call board module through the second cable module, and so on. The last cable module is connected to the last hall call board module, and multiple hall call board modules are connected in a hand-in-hand manner. As shown in Figure 3, the connection diagram of the floor address automatic setting circuit and its equivalent circuit diagram are shown. In the connection diagram of Figure 3, it is assumed that there is an elevator running between N floors. The main control board in its machine room is connected to the positive input and negative input of the N-th floor hall call board in the Nth floor through the live wire and neutral wire of the inter-floor cable. The positive output and negative output of the N-th floor hall call board are then connected to the positive input and negative input of the N-1 floor hall call board in the N-1 floor through the live wire and neutral wire of the inter-floor cable. And so on. The positive output and negative output of the second floor hall call board in the second floor are connected to the first floor hall call board in the 1st floor through the live wire and neutral wire of the inter-floor cable. The positive input terminal and negative input terminal of the board are connected; in the equivalent circuit diagram of Figure 3, U0 represents the power supply provided by the main control module, which can provide a total input voltage of generally 24V; R1 represents the resistance of the cable module, that is, the equivalent resistance of the interlayer cable; L1 represents the inductance of the cable module, that is, the equivalent inductance of the interlayer cable. For a cable with a diameter of 0.75mm and a length of 3m, its impedance is generally 0.078Ω / 10μH; R2 represents the resistance of the hall call board module, that is, the equivalent impedance of the hall call board. For a hall call board with a power of 1W and a supply voltage of 24V, its equivalent impedance is generally 576Ω; u1, u2…u N-1 、u N Respectively represent the input voltages of the first floor hall call board, the second floor hall call board...N-1 floor hall call board, and the N floor hall call board; i1, i2...i N-1 、i N Respectively represent the input current of the first floor hall call board, the second floor hall call board...N-1 floor hall call board, and the N floor hall call board; I L Indicates the load current of the hall call board module, that is, the current flowing through the load of a single hall call board itself. The load resistance R2 of each hall call board module is the same. The load current I L The above examples will be used for further explanation.

[0105] Based on the equivalent circuit diagram in Figure 3, we can know that the difference in input voltage between the hall call board module on the Nth layer and the hall call board module on the N-1th layer is: U N -U N-1 =2R1I N-1 ,

[0106] Among them, U N Indicates the input voltage u N The value of U N-1 Indicates the input voltage u N-1 The value of R1 represents the resistance of the cable module R1, I N-1 Indicates the input current i N-1 The value of .

[0107] Since the load of each external call board divides the input voltage, the input voltage and the voltage output to the next layer are different, so U N -U N-1 The value of is greater than 0, indicating a voltage difference between the input voltages of two adjacent hall call board modules. Based on this, in the automatic floor address setting circuit of this embodiment, the main control module provides the total input voltage to the first hall call board module. After voltage division by the first hall call board module, the first hall call board module then outputs the divided voltage to the second hall call board module. Each hall call board module receives an inconsistent input voltage; the higher the floor the hall call board module is located, the greater its input voltage. Furthermore, each hall call board module is connected to a voltage detection module, which in turn is connected to the main control module.

[0108] Based on the above settings, as shown in Figure 3, when the hall call board module only has a load unit, assuming U N-1 is 24V, then we can get:

[0109] Among them, R2 represents the resistance value of the load resistor R2 of the hall call board module;

[0110] Thus, the voltage difference between the two hall call board modules between two adjacent floors can be calculated: U N -U N-1 =2R1I N-1 =2*0.078*0.0416=0.0065V,

[0111] It can be seen that the voltage difference between the two adjacent hall call board modules in Figure 3 is very small. If the main control module directly obtains the input voltage of the hall call board module that only includes the load unit, that is, it only relies on the voltage difference between the input voltages of different floors caused by the load of the hall call board itself. Direct floor identification will be difficult to identify and prone to errors. Moreover, under the influence of other factors such as the detection accuracy limitation of the voltage detection module, it is even more difficult for the main control module to identify the voltage difference that is too small as mentioned above, and thus it is impossible to accurately identify the floor, which can easily lead to misjudgment of the input voltage of the hall call board module between different floors, thereby causing errors in floor address allocation.

[0112] To this end, in the floor address automatic setting circuit of this embodiment, the hall call board module includes a branch unit and a load unit connected in parallel.

[0113] The specific working process of the floor address automatic setting circuit is as follows:

[0114] The main control module controls the access of the branch unit in the hall call board module; the branch unit superimposes a branch current on the load current of the load unit in the hall call board module to increase the input current of the hall call board module, thereby increasing the voltage drop of the front-end cable module and increasing the voltage difference between two adjacent hall call board modules; the voltage detection module detects the input voltage of multiple hall call board modules; the main control module determines the floor where each hall call board module is located based on the input voltage to set the floor address.

[0115] In this embodiment, by adding a branch unit to the hall call board module, when the branch unit is connected, a branch current can be superimposed on the load current of the load unit, increasing the input current of the hall call board module, thereby increasing the current flowing through the front-end cable module, causing an increase in the voltage drop of the front-end cable module, and thus increasing the input voltage of each hall call board module. The difference in input voltage between the subsequent hall call board module and the previous hall call board module is larger, which increases the voltage difference between two adjacent hall call board modules. Afterwards, the voltage detection module detects the input voltage of multiple hall call board modules and sends it to the main control module. The main control module can determine the floor of the hall call board based on the input voltage of the hall call board module and thus assign a floor address.

[0116] In an optional implementation manner of this embodiment, the main control module can also be used to communicate with multiple hall call board modules, determine the number of hall call board modules, and thus determine the total number of floors; control the connection or disconnection of branch units; and sort the multiple input voltages obtained to determine the order of hall call boards corresponding to each input voltage, thereby determining the floors where the hall call board modules are located in turn, and assigning floor addresses to the hall call boards of the determined floors, so that the hall call boards can respond to the user's elevator call command, so that the elevator's main control board can control the car to run to the corresponding floor to pick up passengers.

[0117] In this implementation, the corresponding specific working process is:

[0118] The main control module outputs a communication signal to each external call board module and receives a feedback signal output by each external call board module based on the communication signal; the number of external call board modules is determined according to the feedback signal, and each external call board module is numbered; the main control module sequentially controls the access of branch units in multiple external call board modules based on preset rules and the numbers of each external call board module; a branch current is superimposed on the load current of the load unit in the external call board module through the branch unit to increase the input current of the external call board module, thereby increasing the voltage drop of the front-end cable module and increasing the voltage difference between two adjacent external call board modules; then, the input voltage of multiple external call board modules is detected by the voltage detection module; the input voltage of all external call board modules is obtained by the main control module, and they are sorted according to the number and input voltage of each external call board module to obtain a sorted input voltage list; the floor where each external call board module is located is determined according to the input voltage list to assign an address to each external call board module. The preset rule refers to the rule for controlling the connection of each hall call board module to the branch unit. It can be to control the connection of each hall call board module to the branch unit randomly and non-repeatedly, or to control the connection of each hall call board module to the branch unit in sequence according to the hall call board module number. After controlling the branch unit of a hall call board module to be connected and the input voltage of the hall call board module is detected, the branch unit of the next hall call board module is controlled to be connected. This cycle continues until the branch units of all hall call board modules have been connected, thereby detecting the input voltage of all hall call board modules.

[0119] The floor address automatic setting circuit provided in this embodiment detects the input voltage of multiple external call board modules through a voltage detection module, and the main control module determines the floor where each external call board module is located according to the input voltage and sets the floor address, thereby achieving the purpose of automatically setting the floor address. Compared with the traditional scheme, it reduces labor costs and does not require additional address lines for setting the address specifically, thereby reducing cable costs; the external call board module is also composed of a branch unit and a load unit in parallel, and the branch unit is respectively connected to the cable module and the voltage detection module. When the branch unit is connected, a branch current is superimposed on the load current of the load unit, thereby increasing the input current of the external call board module, thereby increasing the voltage drop of the front-end cable module, and increasing the voltage difference between two adjacent external call board modules connected by a cable module, so that the main control module can more clearly distinguish the floor where the external call board module is located, thereby improving the precision and accuracy of floor identification, thereby increasing the accuracy of subsequent floor address setting based on the identified floor.

[0120] Example 2

[0121] Based on the same technical concept, with reference to FIG. 4 to FIG. 11 , on the basis of the first embodiment, a second embodiment of the floor address automatic setting circuit of the present application is proposed.

[0122] In this embodiment, the cable module includes a first inductor and a first resistor connected in series, and the branch unit includes:

[0123] The first branch is connected to the first resistor, the load unit, and the voltage detection module respectively. When the first branch is connected, it is used to superimpose the first branch current on the load current to increase the current of the front-end first resistor, thereby increasing the voltage drop of the front-end first resistor and increasing the voltage difference; or

[0124] The second branch is connected to the first resistor, the load unit and the voltage detection module respectively. The second branch is used to superimpose the second branch current on the load current when connected, so as to cause a current mutation in the front-end first inductor, thereby increasing the voltage drop of the front-end first inductor and increasing the voltage difference.

[0125] In this embodiment, the cable module corresponds to the interlayer cable. Based on the equivalent impedance of the interlayer cable, the cable module is equivalent to including an inductor and a resistor, namely a first inductor and a first resistor, such as the inductor L1 and the resistor R1 shown in Figure 3; when the branch unit is connected, the input current of the external call board module is increased to increase the voltage drop of the front-end cable module, specifically, the voltage drop of the first resistor R1 in the cable module can be increased or the voltage drop of the first inductor L1 in the cable module can be increased, thereby increasing the voltage difference between the two adjacent external call board modules.

[0126] The specific working process of this embodiment is as follows:

[0127] The main control module controls the access of the first branch to superimpose the first branch current on the load current, thereby increasing the current of the first resistor at the front end, increasing the voltage drop of the first resistor at the front end, and increasing the voltage difference; then, a branch current is superimposed on the load current of the load unit in the hall call board module through the branch unit to increase the input current of the hall call board module, thereby increasing the voltage drop of the front end cable module and increasing the voltage difference between two adjacent hall call board modules; the voltage detection module detects the input voltage of multiple hall call board modules; the main control module determines the floor where each hall call board module is located according to the input voltage to set the floor address.

[0128] Alternatively, the second branch is connected by controlling the main control module to superimpose the second branch current on the load current, causing a current mutation in the first inductor at the front end, increasing the voltage drop of the first inductor at the front end, and increasing the voltage difference; then a branch current is superimposed on the load current of the load unit in the hall call board module through the branch unit to increase the input current of the hall call board module, thereby increasing the voltage drop of the front end cable module and increasing the voltage difference between two adjacent hall call board modules; the input voltage of multiple hall call board modules is detected by the voltage detection module; the main control module determines the floor where each hall call board module is located according to the input voltage to set the floor address.

[0129] The following describes an implementation of the automatic floor address setting circuit in accordance with this embodiment, in conjunction with the connection diagram and its equivalent circuit diagram shown in Figure 4. The cable module includes a first inductor L1 and a first resistor R1 connected in series, the load unit includes a load resistor R2, and the branch unit includes a first branch, which is connected to the first resistor R1, the load resistor R2, and the voltage detection module.

[0130] In one embodiment, the first branch includes a second resistor R3, a first capacitor C1, and a first switch tube connected in series. The input end of the second resistor R3 and the output end of the first switch tube are respectively connected to the voltage detection module, and the control end of the first switch tube is connected to the main control module.

[0131] The first switch tube is used to be triggered to turn on according to the control signal output by the main control module. The first capacitor C1 is used to be charged after the first switch tube is triggered to turn on, thereby increasing the current on the second resistor R3 to obtain a first branch current, which is superimposed on the load current.

[0132] The voltage detection module is also used to detect the input voltage of the hall call board module to which the first branch belongs after a first preset time after the first switch tube is turned on, so that the main control module obtains the input voltage of all hall call board modules.

[0133] In this embodiment, the first switch tube includes any one of a triode, a field effect tube (such as a MOS tube, a JFET tube, etc.), an insulated gate bipolar transistor (IGBT tube) or a power semiconductor switch.

[0134] The corresponding specific working process in this embodiment is as follows:

[0135] The first switch tube is triggered and turned on by the main control module; the first capacitor is charged after the first switch tube is triggered and turned on, increasing the current on the second resistor to obtain a first branch current, and superimposed on the load current, so that the current of the front-end first resistor increases, the voltage drop of the front-end first resistor increases, and the voltage difference increases; then a branch current is superimposed on the load current of the load unit in the hall call board module through the branch unit, increasing the input current of the hall call board module, thereby increasing the voltage drop of the front-end cable module and increasing the voltage difference between two adjacent hall call board modules; after a first preset time after the first switch tube is turned on, the voltage detection module detects the input voltage of the hall call board module to which the first branch belongs, so that the main control module obtains the input voltage of all hall call board modules; the main control module determines the floor where each hall call board module is located according to the input voltage to set the floor address.

[0136] In the equivalent circuit diagram of FIG4 , the second resistor R3 represents the pulse resistor of the first branch, and a resistor with a resistance of 10Ω is selected here; the first capacitor C1 represents the capacitor used to generate the voltage pulse in the first branch, and a capacitor with a capacitance of 100uF is selected here; Q1, Q2…QN-1, and QN represent the switch tubes used to generate the voltage pulse in the first branch of the first-layer hall call board, the second-layer hall call board…N-1-layer hall call board, and the N-layer hall call board, respectively; i 1_a 、i 2_a …i N-1_a 、i N_a 1, 2, ..., N-1, and N, respectively, represent the first branch current on the first branch of the hall call board. This first branch current is the current flowing through the corresponding second resistor R3 when the first switch in the first branch is on. This example will be used for detailed description later.

[0137] In the specific implementation process, the input end of the second resistor R3 is also connected to the output end of the first resistor R1 of the interlayer cable live wire and one end of the load resistor R2, and the output end of the first switch tube is also connected to the output end of the first resistor R1 of the interlayer cable neutral wire and the other end of the load resistor R2. After the first switch tube is triggered and turned on, the first capacitor C1 starts to charge, the current on the second resistor R3 increases, and the first branch current i 1_a 、i 2_a …i N-1_a 、i N_a Gradually increases and is superimposed on the load current I L On, the input current i1, i2…i N-1 、i N As the voltage increases, the current flowing through the first resistor R1 of the front-end cable module also increases, which can increase the voltage drop on the first resistor R1, thereby increasing the voltage difference between adjacent floors, that is, increasing the input voltage difference between different floors.

[0138] Based on Figure 4 above, it is assumed that the main control module turns on the first switch tubes Q1, Q2...QN-1, QN at different times based on the preset rules, and the voltage detection module detects the input voltages u1, u2...u of the corresponding hall call board module after the first preset time ΔT after the first switch tube is turned on. N-1 、u N , then the main control module can finally obtain the input voltage value U of the first floor hall call board after the first preset time ΔT after Q1 is turned on 1_ΔT , the input voltage value U of the second floor hall call board after the first preset time ΔT after Q2 is turned on 2_ΔT ...the input voltage value U of the hall call board on the N-1 floor after the first preset time ΔT after QN-1 is turned on N-1_ΔT , the input voltage value U of the N-layer hall call board after the first preset time ΔT after QN is turned on N_ΔT.

[0139] Taking the mth floor as an example, in the first branch of the hall call module on the mth floor, after the first switch tube Qm is turned on for the first preset time ΔT, the input voltage u of the hall call module on the mth floor is detected. m , get the input voltage value U m ,i m is the input current of the m-th layer call board module, i m_a is the current flowing through the second resistor R3 of the first branch in the m-th layer call board module, that is, the first branch current; when the first switch tube Qm is turned on, the first branch current i m_a The relationship between the change with time t is:

[0140] Wherein, R3 represents the resistance of the second resistor R3, C1 represents the capacitance of the first capacitor C1, and e is an exponent.

[0141] Based on the above settings, assuming that U m =24V, then the first branch current i can be obtained as shown in Figure 5 m_a Schematic diagram of the change trend, in which the horizontal axis represents time t and the vertical axis represents the current value of the first branch I m_a Assuming ΔT is 0.4ms, the first branch current i can be calculated m_a The value of I m_a_ΔT =2.172A.

[0142] Due to the load current on the load unit in the hall call board module It can be seen that at the moment after the first preset time ΔT after the first switch tube Qm is turned on, the first branch current value I m_a_ΔT Much larger than the load current I L Therefore, the input current i of the hall call board module is m In fact, the load current I of the floor can be ignored. L , then, we can obtain the equivalent circuit diagram when the first branch of the mth layer is connected as shown in Figure 6.

[0143] Based on Figure 6, the equivalent circuit diagram of the mth layer and the m-1th layer can be obtained as shown in Figure 7. When the main control module controls the first switch tube Qm on the first branch of the mth layer to turn on, after the first preset time ΔT after the first switch tube Qm is turned on, the voltage detection module detects the input voltage u of the mth layer call board module. m By testing, the main control module can obtain the input voltage value U of the mth floor hall call board module m_ΔTThen, the main control module controls the first switch tube Qm-1 on the first branch of another floor adjacent to the mth floor, such as the m-1th floor, to turn on. After the first preset time ΔT after the first switch tube Qm-1 is turned on, the voltage detection module detects the input voltage u of the hall call board module on the m-1th floor. m-1 The main control module can obtain the input voltage value U of the hall call board module on the m-1th floor. m-1_ΔT .

[0144] As explained above, in each hall call board module, the load current of the load unit is much smaller than the first branch current of the branch unit, so the load current of all floors can be ignored. Based on this, the effect of this embodiment is verified.

[0145] The hall call board module on the mth layer meets the following requirements:

[0146] Among them, I m_ΔT Indicates the input voltage u of the hall call board module on the mth floor m When the input current of the mth floor hall call board module, I m_a_ΔT Indicates the input voltage u of the hall call board module on the mth floor m The value of the first branch current of the hall call board module on the mth floor when

[0147] The hall call board module on the m-1th floor meets the following requirements: U m-1_ΔT =U0-2R1(N-m+2)I (m-1)_a_ΔT ,

[0148] Among them, I (m-1)_a_ΔT Indicates the input voltage u of the hall call board module on the m-1th floor m-1 The value of the first branch current of the hall call board module on the m-1th floor;

[0149] Based on Figure 7, the hall call board module on the mth layer is connected to the hall call board module on the m-1th layer through interlayer cables. Theoretically, m_a_ΔT with I (m-1)_a_ΔT are equal, and combined with the above set values, we can calculate: U m_ΔT -U m-1_ΔT =2R1I m_a_ΔT =2*0.078Ω*2.172A=0.34V,

[0150] As can be seen, the input voltage difference between two adjacent floors is 0.34V, which is significantly larger than the 0.0065V voltage difference between two adjacent hall call modules calculated in Figure 3. Therefore, under this embodiment, when the first branch is connected, the voltage difference between two adjacent hall call modules can indeed be increased. Moreover, as the floor gets lower, the input voltage of the hall call module decreases. The larger the voltage difference, the greater the difference in the hall call input voltage collected from different floors, allowing the main control module to more clearly distinguish the floor where the hall call module is located.

[0151] Another embodiment of the automatic floor address setting circuit of this embodiment is presented below, in conjunction with the connection schematic diagram and its equivalent circuit diagram shown in Figure 8. The cable module includes a first inductor L1 and a first resistor R1 connected in series, the load unit includes a load resistor R2, and the branch unit includes a second branch, which is connected to the first resistor R1, the load resistor R2, and the voltage detection module.

[0152] In another embodiment, the second branch includes a third resistor R4 and a second switch tube connected in series, the input end of the third resistor R4 and the output end of the second switch tube are respectively connected to the voltage detection module, and the control end of the second switch tube is connected to the main control module;

[0153] The second switch tube is used to trigger conduction according to the control signal output by the main control module, increase the current on the third resistor R4 to obtain a second branch current, and add it to the load current;

[0154] The voltage detection module is also used to detect the input voltage of the hall call board module to which the second branch belongs after a second preset time after the second switch tube is triggered to turn on and before the second switch tube completes conduction, so that the main control module obtains the input voltage of all hall call board modules.

[0155] In this embodiment, the second switch tube includes any one of a triode, a field effect tube (such as a MOS tube, a JFET tube, etc.), an insulated gate bipolar transistor (IGBT tube) or a power semiconductor switch.

[0156] The corresponding specific working process in this embodiment is as follows:

[0157] The main control module controls the second switch tube to trigger conduction, increases the current on the third resistor to obtain a second branch current, and superimposes it on the load current, causing a current mutation in the front-end first inductor, increasing the voltage drop of the front-end first inductor, and increasing the voltage difference; then, a branch current is superimposed on the load current of the load unit in the hall call board module through the branch unit, increasing the input current of the hall call board module, thereby increasing the voltage drop of the front-end cable module and increasing the voltage difference between two adjacent hall call board modules; after a second preset time after the second switch tube is triggered to turn on and before the second switch tube completes the conduction, the voltage detection module detects the input voltage of the hall call board module to which the second branch belongs, so that the main control module obtains the input voltage of all hall call board modules; the main control module determines the floor where each hall call board module is located based on the input voltage to set the floor address.

[0158] In the equivalent circuit diagram of FIG8 , the third resistor R4 represents the pulse resistor of the second branch, and a resistor with a resistance of 100Ω is selected here; Q1, Q2…QN-1, and QN represent the switching tubes for generating voltage pulses in the second branch of the first-layer hall call board, the second-layer hall call board…N-1-layer hall call board, and the N-layer hall call board, respectively; i 1_d 、i 2_d …i N-1_d 、i N_d ] represent the second branch current on the second branch of the first hall call board, the second hall call board, ..., the N-1th hall call board, and the Nth hall call board, respectively. This second branch current is the current flowing through the corresponding third resistor R4 in the second branch when the second switch is on. This example will be used for detailed description later.

[0159] In the specific implementation process, the input end of the third resistor R4 is also connected to the output end of the first resistor R1 of the inter-layer cable live wire and one end of the load resistor R2, and the output end of the second switch tube is also connected to the output end of the first resistor R1 of the inter-layer cable neutral wire and the other end of the load resistor R2. After the second switch tube is triggered and turned on, the current on the third resistor R4 increases, and the second branch current i 1_d 、i 2_d …i N-1_d 、i N_d Sudden increase, superimposed on the load current I L On, the input current i1, i2…i N-1 、i N The first inductor L1 of the front-end cable module generates a sudden current increase, which causes a voltage drop on the first inductor L1, thereby increasing the voltage difference between adjacent floors, that is, increasing the input voltage difference between different floors.

[0160] Based on Figure 8 above, it is assumed that the main control module turns on the second switch tubes Q1, Q2...QN-1, QN at different times based on the preset rules, and the voltage detection module detects the input voltages u1, u2...u of the corresponding hall call board modules in the time period after the second switch tube is triggered to turn on and before it is completed, specifically after the second preset time length ΔT after the triggering and turning on. N-1 、u N , then the main control module can finally obtain the input voltage value U of the first floor hall call board after the second preset time ΔT after triggering Q1. 1_ΔT , the input voltage value U of the second floor hall call board after the second preset time ΔT after Q2 is triggered 2_ΔT ...the input voltage value U of the hall call board on the N-1 floor after the second preset time ΔT after QN-1 is triggered N-1_ΔT , the input voltage value U of the N-layer hall call board after the second preset time ΔT after triggering the conduction QN N_ΔT .

[0161] Taking the mth floor as an example, in the second branch of the hall call module on the mth floor, after the second switch tube Qm is triggered and turned on for the second preset time ΔT, the input voltage u of the hall call module on the mth floor is detected. m , get the input voltage value U m ,i m is the input current of the m-th layer call board module, i m_d The current flowing through the third resistor R4 of the second branch in the m-th layer call board module is the second branch current.

[0162] In this embodiment, the control end of the second switch tube is connected to the main control module through the fourth resistor R5;

[0163] The conduction time length between the triggering and completion of the conduction of the second switch tube is determined based on the resistance value of the fourth resistor R5 , and the second preset time length is set based on the conduction time length.

[0164] Similar to the above embodiment, since the load current of the load unit in each hall call board module is much smaller than the second branch current of the branch unit, the input current i m In fact, the load current I of the floor can be ignored. L , then, we can get the equivalent circuit diagram when the second branch of the mth layer is connected as shown in Figure 9. In Figure 9, u G The voltage required to trigger the second switch Qm to turn on is taken as U G is 12V, R5 is the resistor connected in series to the gate G of the second switch tube Qm when it is turned on; when the second switch tube Qm needs to be turned on, U GFrom 0V to 12V, after passing through the resistor R5, the internal capacitor of the second switch tube Qm is charged. The voltage between the gate G and the source S of the second switch tube Qm is also the turn-on voltage u of the second switch tube Qm. GS Gradually increases, the second branch current i m_d Gradually increases, the gate-source voltage u GS Miller platform voltage U reaching the second switch tube Qm pt Before, the voltage between the drain D and the source S of the second switch tube Qm is also the conduction voltage u of the second switch tube Qm. DS It is almost unchanged, and the turn-on voltage u of the second switch Qm of the mth layer can be obtained as shown in FIG10. GS and the second branch current i m_d In Figure 10, the upper part is the turn-on voltage u GS The relationship curve of U changes with time t, where U th Indicates the threshold voltage of the second switch tube Qm; below is the second branch current i m_d The relationship curve of I changing with time t, where I d_max Indicates the maximum current.

[0165] Based on Figure 10, it can be seen that the second switch tube Qm changes from the off state to the triggered on state, and then to the fully on state due to the Miller effect. At time T1, u G Start applying 12V voltage, u GS gradually increases; at time T2, u GS The threshold voltage U reaches the second switch tube Qm th , the second branch current i m_d begins to rise gradually; at T3, u GS Reaching Miller platform voltage U pt , the second branch current i m_d Rising to the maximum value I d_max At this time, it can be considered that the second switch tube Qm is fully turned on. Therefore, the time period from T2 to T3 belongs to the turn-on period of the second switch tube Qm, which is also the conduction process after the second switch tube Qm is triggered to turn on and before it is completed. During this process, the second branch current i m_d It increases linearly, and the moment T2 can be considered as the starting moment of the conduction process. During this conduction process, the second branch current i m_d The relationship between the change with time t is:

[0166] Wherein, T3 represents the conduction time between the triggering and completion of the conduction of the second switch tube;

[0167] Therefore, by adjusting the resistance of the fourth resistor R5, the conduction time T3 of the second switch tube can be adjusted, that is, the second branch current i m_d Reaching the maximum value I d_max time.

[0168] Continuing to refer to FIG10, at time T3 after the second switch tube Qm is turned on, the conduction voltage u of the second switch tube Qm is DS =0V, there is no more current change on the first inductor L1 in the cable module, so the voltage on the first inductor L1 drops to 0V. Assuming that the input voltage U m_T3 is 24V, the voltage drop U on the first resistor R1 at time T3 can be calculated R1_T3 for:

[0169] Wherein, R4 represents the resistance value of the third resistor R4;

[0170] It can be seen that the voltage drop across the first resistor R1 is small at this time, so the influence of the voltage drop is ignored, that is, it is assumed that the voltage drops across the first inductor L1 and the first resistor R1 are both 0 at time T3. Then, after the second switch Qm is turned on, it can be assumed that U m_T3 ≈U0, so the second branch current i can be calculated m_d The maximum value I d_max :

[0171] Therefore, it can be considered that when the main control module controls the second switch tube Qm of the second branch of the hall call board module of any floor m to be turned on, the reference second branch current i m_d The maximum value I d_max is fixed.

[0172] Next, returning to the conduction process of the second switch tube Qm between time T2 and time T3, the voltage on the first inductor L1 is fixed and unchanged, and the voltage on it is:

[0173] Wherein, L1 represents the value of the first inductor L1;

[0174] After the second preset time ΔT after the second switch tube Qm is triggered to turn on, the voltage detection module performs voltage detection on the hall call board module at a certain moment during the conduction process. At this time, the voltage on the first inductor L1 is:

[0175] Since the circuit structure of each floor is the same, the conduction time T3 is the same, and the value of the first inductor L1 is the same. Therefore, the voltage U of the first inductor L1 on the interlayer cable between any two adjacent hall call board modules is L1_ΔTThen, calculate the second branch current i at the detection time m_d_ΔT With the maximum value I d_max The relationship between them is:

[0176] Since each hall call board module is detected after the second switch tube is triggered and turned on for a fixed second preset time ΔT, the second branch current i m_d_ΔT Size I m_d_ΔT are the same.

[0177] Based on Figure 9, the equivalent circuit diagram of the mth layer and the m-1th layer can be obtained as shown in Figure 11. When the main control module controls the second switch tube Qm on the second branch of the mth layer to turn on, after the second preset time ΔT after the second switch tube Qm is triggered to turn on, the voltage detection module detects the input voltage u of the mth layer call board module. m By testing, the main control module can obtain the input voltage value U of the mth floor hall call board module m_ΔT Then, the main control module controls the second switch tube Qm-1 on the second branch of another floor adjacent to the mth floor, such as the m-1th floor, to turn on. After the second preset time ΔT after the second switch tube Qm-1 is triggered to turn on, the voltage detection module detects the input voltage u of the hall call board module on the m-1th floor. m-1 The main control module can obtain the input voltage value U of the hall call board module on the m-1th floor. m-1_ΔT .

[0178] As explained above, in each hall call board module, the load current of the load unit is much smaller than the second branch current of the branch unit, so the load current of all floors can be ignored. Based on this, the effect of this embodiment is verified.

[0179] The hall call board module on the mth layer meets the following requirements:

[0180] Among them, I m_d_ΔT Indicates the input voltage u of the hall call board module on the mth floor m The value of the second branch current of the hall call board module on the mth floor when

[0181] The hall call board module on the m-1th floor meets the following requirements: U m-1_ΔT =U0-2R1(N-(m-1)+1)I m-1_d_ΔT -2(N-(m-1)+1)U L1_ΔT ,

[0182] Among them, I m-1_d_ΔT Indicates the input voltage u of the hall call board module on the m-1th floor m-1 The value of the second branch current of the hall call board module on the m-1th floor;

[0183] Based on Figure 11, the hall call board module on the mth layer is connected to the hall call board module on the m-1th layer through interlayer cables. Theoretically, m_d_ΔT with I m-1_d_ΔT are equal, then:

[0184] Combining the above set values, and setting the on-time T3 = 1ms and ΔT = 0.5ms, we can calculate:

[0185] As can be seen, the input voltage difference between two adjacent floors is 0.02352V, which is significantly larger than the 0.0065V voltage difference between two adjacent hall call modules calculated in Figure 3. Therefore, under this embodiment, when the second branch is connected, the voltage difference between two adjacent hall call modules can indeed be increased. Moreover, as the floor gets lower, the input voltage of the hall call module decreases, and the larger the voltage difference, the greater the difference in the hall call input voltage collected from different floors, allowing the main control module to more clearly distinguish the floor where the hall call module is located.

[0186] The floor address automatic setting circuit provided in this embodiment proposes two implementation methods of the branch unit in the hall call board module. The first branch or the second branch is connected by triggering the switch tube to be turned on by the main control module, and the branch current is increased on the basis of the load current, so that the input current of the hall call board module is significantly increased, thereby increasing the voltage drop of the cable module, so that the input voltage difference of the hall call board module between two adjacent floors is obvious, so that the input voltage of each hall call board module is obviously different, which facilitates the main control module to process the multiple input voltages detected by the voltage detection module, so as to correctly identify each floor and thus correctly configure the floor address.

[0187] Example 3

[0188] Based on the same inventive concept, referring to FIG. 12 and FIG. 13 , on the basis of the first embodiment, a third embodiment of the automatic floor address setting circuit of the present application is proposed.

[0189] In an optional embodiment, the voltage detection module may include a plurality of detection circuits and a plurality of signal processing circuits connected in a corresponding manner, the plurality of detection circuits are connected to the plurality of hall call board modules in a one-to-one correspondence, and the plurality of signal processing circuits are all connected to the main control module;

[0190] The detection circuit is used to detect the input voltage of the corresponding hall call board module to obtain a detection signal. The signal processing circuit is used to enhance the received detection signal and output the processed detection signal to the main control module.

[0191] Usually, the voltage detection module sends the detected detection signal to the main control module. The chip MCU (Microcontroller Unit) used in the main control module is generally 3.3V. m_ΔT The voltage is around 24V, detect U m_ΔT After the voltage is measured, the detection signal needs to be scaled down by a certain percentage before being sent to the MCU for subsequent processing. For example, if the signal is scaled down tenfold, the value actually received by the MCU is essentially 1 / 10 of the input voltage of the hall call board module, and the voltage difference between adjacent floors is also 1 / 10 of the actual voltage difference. If the voltage difference between different floors is originally very small, if the voltage difference is scaled down tenfold, the voltage difference value received by the MCU will be even smaller. This will result in the main control module's MCU requiring higher detection accuracy in actual applications, or may lead to the inability to identify the voltage difference between different floors, resulting in the inability to identify the specific floor.

[0192] Based on this, this embodiment proposes a voltage detection method that does not require attenuation of the detection signal. Specifically, the signal processing circuit enhances the detection signal and outputs the processed detection signal to the main control module to remove the DC component.

[0193] In this embodiment, the signal processing circuit may include an amplifier U1, a diode D1, and a diode D2;

[0194] The negative input terminal of the amplifier U1 is connected to the cathode of the diode D1 through the resistor R11, the positive input terminal of the amplifier U1 is connected to the cathode of the diode D2 through the resistor R12, the anode of the diode D1 and the anode of the diode D2 are both connected to the detection circuit, and the output terminal of the amplifier U1 is connected to the main control module.

[0195] In this embodiment, the signal processing circuit may further include a capacitor C2, a resistor R13, and a resistor R14;

[0196] One end of capacitor C2 is connected to the common point of the cathode of diode D2 and resistor R12, one end of resistor R13 is connected to the common point of resistor R12 and the positive input terminal of amplifier U1, the other end of capacitor C2 and the other end of resistor R13 are grounded, and the negative input terminal of amplifier U1 is connected to the output terminal of amplifier U1 through resistor R14.

[0197] In this embodiment, the resistors R11 and R12 function as input buffers, the capacitor C2 functions as a filter, and the resistor R14 functions as a feedback resistor for adjusting the amplification factor of the amplifier U1.

[0198] FIG12 is a schematic diagram of the signal processing circuit in this embodiment. Such a signal processing circuit is provided in the voltage detection module provided on each hall call board. To verify the effect of this embodiment, the first branch current can be obtained based on the equivalent circuit diagrams shown in FIG6 and FIG7:

[0199] And the input voltage of the hall call board module:

[0200] Among them, u C1 (t) represents the voltage on the first capacitor C1;

[0201] It can be seen that after the first switch tube is turned on, the input voltage u m-1 Decreases exponentially, so the input voltage u of the m-th layer call board module m It also decreases exponentially.

[0202] Based on the above settings, if u is set according to the above existing method m After being scaled down tenfold and fed to the MCU, the detection signal received by the MCU is:

[0203] Among them, U OFF Indicates the input voltage of the hall call board on the mth floor when all the switches on all floors are turned off, that is, when the branch unit in the hall call board module is not connected;

[0204] Combined with the setting values ​​of the above embodiment, and setting U OFF =24V, ΔT=0.4ms, we can calculate: u m_MCU (0)=2.4V; u m_MCU (ΔT)=2.388V;

[0205] Thus we can calculate: m_MCU (0)-u m_MCU (ΔT) = 0.012 V;

[0206] It can be seen that in the aforementioned existing method, after the input voltage of the hall call board module is reduced by ten times, the voltage difference of the detection signal when the first switch tube is turned off and after it is turned on is only 0.012V. Taking into account the influence of factors such as the error of the detection circuit and the detection error of the MCU itself, it is very likely that the voltage difference between different floors will not be obvious, and it is even impossible to directly detect that there is a difference in the input voltage of the hall call board modules on different floors. Therefore, the MCU will be unable to determine the floor, and thus unable to identify the floor where each hall call board module is located, and thus unable to configure the floor address normally, resulting in the inability to automatically set the floor address.

[0207] However, in this embodiment, a signal processing circuit is provided on each hall call board module. F Represents the conduction voltage drop of diode D1. During the period when the first switch tube Qm is turned on, the negative input voltage u of amplifier U1 is - for:

[0208] Since the second resistor R3 is much larger than the first resistor R1, it can be considered that the negative input voltage u - Follow the input voltage u of the mth floor hall call board module m From U OFF -U F Initially, it decreases exponentially.

[0209] In the signal processing circuit of this embodiment, the values ​​of the capacitor C2 and the resistor R12 are determined by the voltage u1 at the positive input of the amplifier U1 during the on-state of the first switch Qm. + Therefore, when the capacitor C2 is large enough and the resistor R12 is large enough, for example, when C2 = 9.4uF, R12 = R13 = 1MΩ, the positive input voltage u + For: u + (t) = U OFF -U F ,

[0210] Then the voltage u output by amplifier U1 to MCU m_MCU for:

[0211] Set U here OFF =24V, then we can calculate: m_MCU (0)=0V; u m_MCU (ΔT) = 0.12 V;

[0212] It can be seen from this that at the moment after the first preset time length ΔT after the first switch tube is turned on, the MCU can identify a voltage deviation of 0.12V, which is used to determine the floor address. This will make the MCU identification more accurate, so that it can accurately identify the floor where the hall call board module is located, providing an accurate reference for the subsequent automatic setting of the floor address.

[0213] In a specific embodiment, the cable module may include:

[0214] Segmented cable, one end of the segmented cable is connected to the main control module / hall call board module, and the other end of the segmented cable is connected to the hall call board module; or,

[0215] Main cable and branch cable, the main cable is connected to the main control module, one end of the branch cable is connected to the hall call board module, and the other end of the branch cable is connected to the main cable.

[0216] Based on Figures 4 and 8 of the above embodiment, it can be seen that the cable module can adopt a segmented cable with the input end connected to the previous hall call board module and the output end connected to the next hall call board module, and its impedance is regarded as the first resistor R1 and the first inductor L1; however, in actual applications, not all elevator hall call boards adopt this connection method, and there may be other connection methods. For example, a main cable is led out from the main control board, and then for multiple hall call boards, separate branch cables are used to connect the hall call board modules to the main cable.

[0217] As shown in the connection diagram and its equivalent circuit diagram in FIG13, in the mode in which the cable module includes a main cable and a branch cable, since the branch cable is added, the impedance of the branch cable is regarded as the resistor R6, then the two branch cables connecting the hall call board are equivalent to adding a resistor R6 at each end of the branch unit. The inter-layer cables between the original floors are part of the main cables between the floors, and their impedance can still be regarded as the first resistor R1 and the first inductor L1. As shown in the equivalent circuit diagram of FIG13, the input voltage of the hall call board module detected by the voltage detection module will actually be the voltage at both ends of the branch unit. Based on this, the aforementioned first branch and second branch can both be applied to the connection method of FIG13 to realize the automatic setting of the floor address. Therefore, the floor address automatic setting circuit proposed in the specific implementation of the above embodiment can be applied to the two specific connection methods of the cable module. The specific principle and working process can be referred to the above description and will not be repeated here.

[0218] The floor address automatic setting circuit provided in this embodiment improves the signal processing circuit in the voltage detection module, so that the signal received by the main control module is more convenient for its subsequent floor identification, thereby ensuring the accuracy of the automatic setting of the floor address. In addition, the signal processing circuit is more suitable for the two branch unit structures proposed in this embodiment, following the central concept of increasing the voltage difference between the two adjacent floors of the hall call board modules, further facilitating the main control module to more clearly distinguish the floor where the hall call board module is located, improving the precision and accuracy of floor identification, thereby increasing the accuracy of subsequent floor address setting based on the identified floor.

[0219] Example 4

[0220] Based on the same inventive concept, referring to FIG. 14 , on the basis of the first embodiment, a first embodiment of the method for automatically setting the floor address of the present application is proposed.

[0221] As shown in the flowchart of FIG14 , the method for automatically setting the floor address may include:

[0222] S100: Control the access of the branch unit in the hall call board module through the main control module;

[0223] S200: superimposing a branch current on the load current of the load unit in the hall call board module through the branch unit to increase the input current of the hall call board module, thereby increasing the voltage drop of the front-end cable module and increasing the voltage difference between two adjacent hall call board modules;

[0224] S300: Detecting the input voltages of multiple hall call board modules through a voltage detection module;

[0225] S400: The main control module determines the floor where each hall call board module is located according to the input voltage to set the floor address.

[0226] In an optional embodiment, before step S100 of “controlling the access of the branch unit in the hall call board module through the main control module”, the method may further include:

[0227] S001: Output communication signals to each hall call board module through the main control module, and receive feedback signals output by each hall call board module based on the communication signals;

[0228] S002: Determine the number of hall call board modules according to the feedback signal and number each hall call board module;

[0229] At this time, step S100 may include:

[0230] S101: The main control module sequentially controls the access of branch units in multiple hall call board modules based on preset rules and the numbers of each hall call board module;

[0231] Step S400 may include:

[0232] S401: Obtain the input voltages of all hall call board modules through the main control module, and sort the hall call board modules according to their numbers and input voltages to obtain a sorted input voltage list;

[0233] S402: Determine the floor where each hall call board module is located according to the input voltage list to assign an address to each hall call board module.

[0234] In an optional embodiment, the cable module includes a first inductor and a first resistor connected in series, and the branch unit includes a first branch or a second branch; step S100 of "controlling access to the branch unit in the hall call board module through the main control module" may include:

[0235] S110: Control the first branch to be connected by the main control module to superimpose the first branch current on the load current, thereby increasing the current of the first front-end resistor, increasing the voltage drop of the first front-end resistor, and increasing the voltage difference; or

[0236] S120: Control the second branch to be connected through the main control module to superimpose the second branch current on the load current, so as to cause a current mutation in the front-end first inductor, increase the voltage drop of the front-end first inductor, and increase the voltage difference.

[0237] In this embodiment, the first branch includes a second resistor, a first capacitor, and a first switching tube connected in series. The input end of the second resistor and the output end of the first switching tube are respectively connected to the voltage detection module, and the control end of the first switching tube is connected to the main control module. Step S110 of "controlling the connection of the first branch through the main control module to superimpose the first branch current on the load current, thereby increasing the current of the front-end first resistor, increasing the voltage drop of the front-end first resistor, and increasing the voltage difference" may include:

[0238] S111: Controlling the first switch tube to be triggered and turned on by the main control module;

[0239] S112: After the first switch tube is triggered to turn on, the first capacitor is charged to increase the current on the second resistor to obtain a first branch current, and the first branch current is superimposed on the load current;

[0240] Correspondingly, step S300 of “detecting the input voltages of multiple hall call board modules by a voltage detection module” may include:

[0241] S310: After a first preset time period after the first switch tube is turned on, the voltage detection module detects the input voltage of the hall call board module to which the first branch belongs, so that the main control module obtains the input voltage of all hall call board modules.

[0242] In this embodiment, the second branch includes a third resistor and a second switching tube connected in series, the input end of the third resistor and the output end of the second switching tube are respectively connected to the voltage detection module, and the control end of the second switching tube is connected to the main control module. Step S120 of "controlling the connection of the second branch through the main control module to superimpose the second branch current on the load current, causing a sudden current change in the front-end first inductor, increasing the voltage drop of the front-end first inductor, and increasing the voltage difference" may include:

[0243] S121: Controlling the second switch tube to be triggered and turned on by the main control module to increase the current on the third resistor to obtain a second branch current, and superimposing the second branch current on the load current;

[0244] Correspondingly, step S300 of “detecting the input voltages of multiple hall call board modules by a voltage detection module” may include:

[0245] S320: After a second preset time period after the second switch tube is triggered to turn on and before the second switch tube completes the conduction, the voltage detection module detects the input voltage of the hall call board module to which the second branch belongs, so that the main control module obtains the input voltage of all hall call board modules.

[0246] For more implementation details of the specific implementation of the above method steps, please refer to the description of the specific implementation in Examples 1 to 3. For the sake of brevity of the description, they will not be repeated here.

[0247] It should be noted that the functions that can be realized by each module in the second theme provided in this embodiment and the corresponding technical effects achieved can refer to the description of the specific implementation methods in each embodiment of the automatic floor address setting circuit of this application. For the sake of brevity of the description, they will not be repeated here.

[0248] Example 5

[0249] Based on the same inventive concept, this embodiment provides an elevator, which may include:

[0250] Main control board;

[0251] Multiple hall call boards are set up on each floor;

[0252] Multiple interlayer cables for connecting the main control board and a hall call board or connecting two adjacent hall call boards; and

[0253] For example, in the floor address automatic setting circuit of any one of the above-mentioned embodiments 1 to 3, the main control module corresponds to the main control board, the multiple external call board modules correspond to the multiple external call boards, and the multiple cable modules correspond to the multiple inter-layer cables.

[0254] Among them, the specific structure of the floor address automatic setting circuit can refer to the above embodiment. Since this embodiment adopts all the technical solutions of all the above embodiments of the floor address automatic setting circuit, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

[0255] It should be noted that the serial numbers of the above embodiments of this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments. The above embodiments are only optional embodiments of this application and do not limit the scope of the patent of this application. All equivalent structures or equivalent process changes made by using the contents of the description and drawings of this application under the inventive concept of this application, or directly or indirectly applied in other related technical fields, are included in the scope of patent protection of this application.

Claims

1. A floor address automatic setting circuit, wherein: The floor address automatic setting circuit includes a main control module, a plurality of cable modules, a plurality of hall call board modules and a voltage detection module, wherein the main control module is connected to a hall call board module through a cable module, two adjacent hall call board modules are connected through a cable module, and the voltage detection module is respectively connected to the plurality of hall call board modules and the main control module; Wherein, each of the hall call board modules includes a branch unit and a load unit connected in parallel, and the branch unit is connected to the cable module and the voltage detection module respectively; When the branch unit is connected, a branch current is superimposed on the load current of the load unit to increase the input current of the hall call board module, so as to increase the voltage drop of the front cable module and increase the voltage difference between two adjacent hall call board modules; The voltage detection module is used to detect the input voltage of the plurality of hall call board modules, and the main control module is used to determine the floor where each hall call board module is located according to the input voltage, so as to set the floor address.

2. The floor address automatic setting circuit according to claim 1, wherein: The cable module includes a first inductor and a first resistor connected in series, and the branch unit includes: a first branch connected to the first resistor, the load unit and the voltage detection module respectively, and the first branch is used to superimpose the first branch current on the load current when connected, so as to increase the current of the first resistor at the front end, thereby increasing the voltage drop of the first resistor at the front end and increasing the voltage difference; or The second branch is connected to the first resistor, the load unit and the voltage detection module respectively. The second branch is used to superimpose the second branch current on the load current when connected, so that the first inductor at the front end produces a current mutation, so as to increase the voltage drop of the first inductor at the front end and increase the voltage difference.

3. The floor address automatic setting circuit as claimed in claim 2, wherein: The first branch includes a second resistor, a first capacitor and a first switch tube connected in series, the input end of the second resistor and the output end of the first switch tube are respectively connected to the voltage detection module, and the control end of the first switch tube is connected to the main control module; The first switch tube is used to trigger conduction according to the control signal output by the main control module, and the first capacitor is used to charge after the first switch tube is triggered to conduct, increase the current on the second resistor, so as to obtain the first branch current, and superimpose it on the load current; The voltage detection module is also used to detect the input voltage of the hall call board module to which the first branch belongs after a first preset time after the first switch tube completes conduction, so that the main control module obtains the input voltage of all hall call board modules.

4. The floor address automatic setting circuit as claimed in claim 2, wherein: The second branch includes a third resistor and a second switch tube connected in series, the input end of the third resistor and the output end of the second switch tube are respectively connected to the voltage detection module, and the control end of the second switch tube is connected to the main control module; The second switch tube is used to trigger conduction according to the control signal output by the main control module, increase the current on the third resistor to obtain the second branch current, and superimpose it on the load current; The voltage detection module is also used to detect the input voltage of the external call board module to which the second branch belongs after a second preset time after the second switch tube is triggered to turn on and before the second switch tube completes the conduction, so that the main control module obtains the input voltage of all external call board modules.

5. The floor address automatic setting circuit as claimed in claim 4, wherein: The control end of the second switch tube is connected to the main control module through a fourth resistor; The conduction time length from the triggering and conducting of the second switch tube to the completion of the conducting is determined based on the resistance value of the fourth resistor, and the second preset time length is set based on the conduction time length.

6. The floor address automatic setting circuit according to claim 1, wherein: The voltage detection module includes a plurality of detection circuits and a plurality of signal processing circuits connected in correspondence, the plurality of detection circuits are connected in one-to-one correspondence with the plurality of hall call board modules, and the plurality of signal processing circuits are connected with the main control module; The detection circuit is used to detect the input voltage of the corresponding exterior call board module to obtain a detection signal. The signal processing circuit is used to enhance the received detection signal and output the processed detection signal to the main control module.

7. The floor address automatic setting circuit as claimed in claim 6, wherein: The signal processing circuit includes an amplifier U1, a diode D1, and a diode D2; The negative input terminal of the amplifier U1 is connected to the cathode of the diode D1 through a resistor R11, the positive input terminal of the amplifier U1 is connected to the cathode of the diode D2 through a resistor R12, the anode of the diode D1 and the anode of the diode D2 are both connected to the detection circuit, and the output terminal of the amplifier U1 is connected to the main control module.

8. The floor address automatic setting circuit according to any one of claims 1 to 7, wherein: The cable module comprises: A segmented cable, one end of which is connected to the main control module / the hall call board module, and the other end of which is connected to the hall call board module; or A main cable and a branch cable, wherein the main cable is connected to the main control module, one end of the branch cable is connected to the hall call board module, and the other end of the branch cable is connected to the main cable.

9. A method for automatically setting a floor address, wherein: The method is applied to the floor address automatic setting circuit according to any one of claims 1 to 8, and the method comprises: Controlling the access of the branch unit in the hall call board module through the main control module; A branch current is superimposed on the load current of the load unit in the hall call board module by the branch unit to increase the input current of the hall call board module, so as to increase the voltage drop of the front cable module and increase the voltage difference between two adjacent hall call board modules; Detecting the input voltage of the plurality of hall call board modules by the voltage detection module; The main control module determines the floor where each hall call board module is located according to the input voltage to set the floor address.

10. The method for automatically setting a floor address as claimed in claim 9, wherein: Before the step of controlling the access of the branch unit in the hall call board module by the main control module, the method further includes: Outputting a communication signal to each of the hall call board modules through the main control module, and receiving a feedback signal output by each of the hall call board modules based on the communication signal; Determine the number of the hall call board modules according to the feedback signal, and number each hall call board module; The step of controlling the access of the branch unit in the hall call board module by the main control module comprises: The main control module sequentially controls the access of the branch units in the plurality of hall call board modules based on preset rules and the numbers of the hall call board modules; The step of determining the floor where each hall call board module is located according to the input voltage by the main control module to set the floor address includes: The input voltages of all the hall call board modules are acquired through the main control module, and the hall call board modules are sorted according to their numbers and input voltages to obtain a sorted input voltage list; The floors where the hall call board modules are located are determined according to the input voltage list, so as to allocate addresses to the hall call board modules.

11. The method for automatically setting a floor address according to claim 9, wherein: The cable module includes a first inductor and a first resistor connected in series, and the branch unit includes a first branch or a second branch; The step of controlling the access of the branch unit in the hall call board module by the main control module comprises: Controlling the first branch to be connected through the main control module to superimpose the first branch current on the load current, thereby increasing the current of the first resistor at the front end, increasing the voltage drop of the first resistor at the front end, and increasing the voltage difference; or, The second branch is connected by controlling the main control module to superimpose the second branch current on the load current, so as to cause a current mutation in the first inductor at the front end, increase the voltage drop of the first inductor at the front end, and increase the voltage difference.

12. The method for automatically setting a floor address according to claim 11, wherein: The first branch includes a second resistor, a first capacitor and a first switch tube connected in series, the input end of the second resistor and the output end of the first switch tube are respectively connected to the voltage detection module, and the control end of the first switch tube is connected to the main control module; The step of controlling the first branch to be connected by the main control module to superimpose the first branch current on the load current, thereby increasing the current of the first resistor at the front end, increasing the voltage drop of the first resistor at the front end, and increasing the voltage difference includes: Controlling the first switch tube to be triggered and turned on by the main control module; After the first switch tube is triggered and turned on, the first capacitor is charged to increase the current on the second resistor to obtain the first branch current, and superimpose it on the load current; The step of detecting the input voltages of the plurality of hall call board modules by the voltage detection module comprises: The voltage detection module detects the input voltage of the hall call board module to which the first branch belongs after a first preset time after the first switch tube is turned on, so that the main control module obtains the input voltage of all hall call board modules.

13. The method for automatically setting a floor address according to claim 11, wherein: The second branch includes a third resistor and a second switch tube connected in series, the input end of the third resistor and the output end of the second switch tube are respectively connected to the voltage detection module, and the control end of the second switch tube is connected to the main control module; The step of controlling the second branch to be connected by the main control module to superimpose the second branch current on the load current, causing the first inductor at the front end to produce a current mutation, increasing the voltage drop of the first inductor at the front end, and increasing the voltage difference includes: Controlling the second switch tube to be triggered and turned on by the main control module to increase the current on the third resistor to obtain the second branch current, and superimposing it on the load current; The step of detecting the input voltages of the plurality of hall call board modules by the voltage detection module comprises: The voltage detection module detects the input voltage of the external call board module to which the second branch belongs after a second preset time after the second switch tube is triggered to turn on and before the second switch tube completes the conduction, so that the main control module obtains the input voltage of all external call board modules.

14. An elevator, wherein: The elevator comprises: Main control board; Multiple hall call boards are installed on each floor; A plurality of interlayer cables, used to connect the main control board and one of the hall call boards or to connect two adjacent hall call boards; and, The floor address automatic setting circuit according to any one of claims 1 to 8, wherein the main control module corresponds to the main control board, the multiple external call board modules correspond to the multiple external call boards, and the multiple cable modules correspond to the multiple inter-layer cables.

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