Cabinet door state detection system and intelligent locker

Abstract

The utility model provides a cabinet door state detection system and an intelligent locker. The cabinet door state detection system comprises a main control module, a channel multiplexing module and a cabinet door state feedback module. The channel multiplexing module comprises an output pin, a controlled end and a plurality of input pins, the output pin is connected with the detection pin of the main control module, the controlled end is connected with the control end of the main control module, and the plurality of input pins are connected with corresponding cabinet door state feedback modules; the plurality of cabinet door state feedback modules are respectively provided with a plurality of cabinet door groups in a one-to-one correspondence manner; the cabinet door state feedback module is used for outputting a voltage signal to the input pin connected with the cabinet door state feedback module, and the voltage signal shows different voltages according to different opening and closing states of the corresponding cabinet door group; the main control module is used for controlling the controlled end through the control end, so that the output pin is conducted with one of the input pins; according to the invention, on the premise of limited GPIO pin resources, the opening and closing states of the plurality of cabinet door groups can be accurately detected.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of lockers, and particularly relates to a locker door state detection system and an intelligent locker. BACKGROUND

[0002] The intelligent locker is a modern storage equipment based on the Internet of Things and intelligent technology. The intelligent locker provides a convenient and safe storage solution by integrating technologies such as electronic locks, sensors, network connections, and software systems. Nowadays, the intelligent locker has been widely used in various fields, such as express service, shopping malls, gyms, schools, airports, and hotels, greatly facilitating daily life.

[0003] For the intelligent locker, the locker door state detection technology is very important, that is, to detect whether the locker door is open or closed. In the prior art, to determine the state of a certain locker door, a GPIO (General Purpose Input / Output) pin of a control chip can be used to receive a digital signal reflecting the opening and closing of the locker door, and then the state of the locker door can be determined. For example, if a high level is received, it can be indicated that the locker door is open, and if a low level is received, it can be indicated that the locker door is closed, that is, the locker door is closed.

[0004] It can be understood that, since the number of locker doors of the intelligent locker is relatively large, the prior art needs to use a large number of GPIO pins. However, the GPIO pin resources of the control chip are limited. In the case of enough resources, obviously, too many GPIO pin resources will be consumed, which is not conducive to the later product upgrade, maintenance, and other operations. In the case of insufficient resources, the prior art also needs to use a dedicated GPIO expansion chip, which will greatly increase the cost. CONTENT OF THE INVENTION

[0005] The application provides a locker door state detection system and an intelligent locker, which are used to detect the opening and closing states of a plurality of locker groups under the premise of limited GPIO pin resources.

[0006] In order to solve the above technical problems, the application provides a locker door state detection system, which comprises a master control module, a channel multiplexing module, and a locker door state feedback module.

[0007] The channel multiplexing module comprises an output pin, a controlled end, and a plurality of input pins. The output pin is connected with a detection pin of the master control module, the controlled end is connected with a control end of the master control module, and a plurality of input pins are connected with corresponding locker door state feedback modules. Wherein, a plurality of locker door state feedback modules are respectively and one-to-one corresponding to a plurality of locker groups, and the locker group comprises a plurality of opening and closing states.

[0008] The cabinet door state feedback module is configured to output a voltage signal to the input pin connected thereto, and the voltage signal exhibits different voltage values according to different opening and closing states of the corresponding cabinet door group.

[0009] The master control module is configured to control the slave control end through the control end, so that the output pin is connected to one of the input pins.

[0010] As a further improvement of the present application, the cabinet door state feedback module comprises a variable resistance circuit and a fixed resistance circuit, and the variable resistance circuit is configured to exhibit different resistance values according to different opening and closing states of the opposite cabinet door group.

[0011] The variable resistance circuit and the fixed resistance circuit are connected in series between a preset voltage and ground, and the connection between the variable resistance circuit and the fixed resistance circuit is connected to the corresponding input pin, configured to output a voltage signal to the input pin connected thereto.

[0012] As a further improvement of the present application, the variable resistance circuit comprises a plurality of switches and a plurality of voltage dividing resistors.

[0013] The plurality of switches are one-to-one corresponding to a plurality of cabinet doors in the corresponding cabinet door group, and the on-off of the switch is controlled by the opening and closing state of the corresponding cabinet door. The plurality of voltage dividing resistors are one-to-one corresponding to the plurality of switches, and the resistance values of the plurality of voltage dividing resistors are different.

[0014] One end of the switch is connected to the fixed resistance circuit, and the other end of the switch is connected to ground through the corresponding voltage dividing resistor.

[0015] As a further improvement of the present application, the number of cabinet doors in each cabinet door group is at least three.

[0016] As a further improvement of the present application, when the state of the cabinet door is open, the switch corresponding to the cabinet door is turned on; when the state of the cabinet door is closed, the switch corresponding to the cabinet door is turned off.

[0017] As a further improvement of the present application, the channel multiplexing module further comprises an enable pin, and the master control module further comprises an enable control end.

[0018] The number of channel multiplexing modules is multiple, the enable control end is connected to the enable pins of the plurality of channel multiplexing modules, and the slave control ends of the plurality of channel multiplexing modules are connected to the same control end.

[0019] As a further improvement of the present application, the number of input pins in the channel multiplexing module is eight, and the control end in the master control module comprises three control pins.

[0020] As a further improvement of the present application, the present application also provides an intelligent locker, which comprises the locker door state detection system.

[0021] Compared with the prior art, the locker door state detection system provided by the present application is provided with a main control module, a channel multiplexing module and a locker door state feedback module, and each locker door state feedback module is provided with a plurality of locker door groups one by one, each locker door group comprises a plurality of locker doors, and there are a plurality of opening and closing states of the locker doors. The locker door state feedback module outputs a voltage signal to the input pin of the channel multiplexing module connected thereto. Since the voltage signal can show different voltage values according to different opening and closing states of the corresponding locker door group, the main control module can control the controlled end through the control end, so that the output pin in the locker door state feedback module is connected to one of the input pins, thereby connecting the voltage signal to the output pin through the connected input pin. Then, the main control module processes the voltage signal to identify the opening and closing state of the current locker door, effectively reduces the number of GPIO pins required by the main control module, and reduces the complexity of the detection circuit. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0023] Figure 1 is a module diagram of the locker door state detection system provided by the present application;

[0024] Figure 2 is a structural schematic diagram of the main control module and the channel multiplexing module in the locker door state detection system provided by the present application;

[0025] Figure 3 is a structural schematic diagram of the locker door state feedback module in the locker door state detection system provided by the present application;

[0026] Figure 4 is a structural schematic diagram of the locker door state detection system provided by the present application;

[0027] Figure 5 is a specific embodiment diagram of the locker door state detection system provided by the present application;

[0028] Figure 6 is Figure 5 is a summary diagram of the eight switch states provided by the embodiment shown in the figure;

[0029] Reference Signs List:

[0030] 1 - master module; 2 - channel multiplexing module; 3 - cabinet door state feedback module; 31 - variable resistance circuit; 32 - fixed resistance circuit. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the embodiments of the present application will be further described in detail below in combination with the drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the embodiments of the present application, and are not used to limit the embodiments of the present application.

[0032] In the description of the embodiments of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise explicitly specified. All directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications also change accordingly. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion.

[0033] In order to make the description of the present disclosure more detailed and complete, the following describes the embodiments of the embodiments of the present application in an illustrative manner; but this is not the only form of implementation or use of the specific embodiments of the present application. The embodiments include the features of multiple specific embodiments and the method steps and their order used to construct and operate these specific embodiments. However, other specific embodiments can also be used to achieve the same or equivalent functions and step orders.

[0034] Please refer to Figures 1-6 The embodiments of the present application provide a cabinet door state detection system and an intelligent storage cabinet, which are used for detecting the opening and closing states of multiple cabinet door groups under the premise of limited GPIO pin resources.

[0035] As an optional embodiment, please refer to Figure 1 The cabinet door state detection system provided by the embodiments of the present application is shown in the module diagram, which specifically includes a master module 1, a channel multiplexing module 2 and a cabinet door state feedback module 3.

[0036] Please refer to Figure 2As can be observed from the structural schematic diagram of the main control module 1 and the channel multiplexing module 2 in the cabinet door state detection system provided in the embodiment of the present application, the channel multiplexing module 2 comprises an output pin (ADC), a controlled end (S1, S2 and S3), and a plurality of input pins (Y0, Y1, Y2, Y3, Y4, Y5, Y6 and Y7), the controlled end is connected with the control end (S1, S2 and S3) of the main control module 1 in a one-to-one correspondence, and each input pin is connected with a corresponding cabinet door state feedback module 3.

[0037] Further, each cabinet door state feedback module 3 is provided with a plurality of cabinet door groups (not shown in the figure) in a one-to-one correspondence, each cabinet door group comprises a plurality of cabinet doors, and there are a plurality of opening and closing states of the cabinet doors. The present application outputs a voltage signal to the input pin connected therewith through the cabinet door state feedback module 3. The voltage signal can show different voltage values according to different opening and closing states of the corresponding cabinet door group. The main control module 1 is used to control the controlled end through the control end, so that the output pin in the cabinet door state feedback module 3 is conducted with one of the input pins.

[0038] In the embodiment of the present application, the main control module 1 can make the output pin in the cabinet door state feedback module 3 conducted with one of the input pins, realize the selection and switching of different analog channels in the cabinet door state feedback module 3, so as to connect the voltage signal to the output pin through the conducted input pin, and then process the voltage signal through the main control module 1 to identify the opening and closing state of the current cabinet door, thereby effectively saving the number of GPIO pins required by the main control module 1 and reducing the cost and circuit complexity.

[0039] In an optional embodiment, please refer to Figure 3 As can be observed from the structural schematic diagram of the cabinet door state feedback module 3 in the cabinet door state detection system provided in the embodiment of the present application, the door state feedback module provided in the present application comprises a variable resistance circuit 31 and a fixed resistance circuit 32 connected with the variable resistance circuit 31. The variable resistance circuit 31 can show different resistance values according to different opening and closing states of the corresponding cabinet door group.

[0040] Specifically, the variable resistance circuit 31 and the fixed resistance circuit 32 are connected in series between a preset voltage (VCC) and the ground, and the connection between the variable resistance circuit 31 and the fixed resistance circuit 32 is connected with the corresponding input pin. Since the variable resistance circuit 31 can show different resistance values according to different opening and closing states of the corresponding cabinet door group, the voltage division value between the variable resistance circuit 31 and the fixed resistance circuit 32 changes, so that the voltage signal output to the input pin connected therewith shows different voltage values, so that the main control module 1 can collect the opening and closing states of each cabinet door of the register cabinet through the voltage signal.

[0041] As an optional implementation, the variable resistance circuit 31 includes a plurality of switches and a plurality of voltage dividing resistors, and the fixed resistance circuit 32 includes a fixed resistor. In this application, one end of the switch is connected to the fixed resistor of the fixed resistance circuit 32, and the other end of the switch is connected to the corresponding voltage dividing resistor and then grounded.

[0042] In the embodiment of the application, the cabinet door group includes a plurality of cabinet doors. By one-to-one correspondence between the plurality of switches and the plurality of cabinet doors in the corresponding cabinet door group, the on-off of the switch is controlled by the opening and closing state of the corresponding cabinet door.

[0043] It can be understood that the plurality of voltage dividing resistors and the plurality of switches in the application should be one-to-one correspondence, and the resistance values of the plurality of voltage dividing resistors are different. In this way, when the opening and closing state of the corresponding cabinet door of the switch changes, the resistance value in the variable resistance circuit 31 will change differently, thereby showing different voltage values.

[0044] Please continue to refer to Figure 3 The variable resistance circuit 31 is provided with three switches M1, M2 and M3, and the three switches M1, M2 and M3 are connected with three voltage dividing resistors R1, R2 and R3, and the three switches M1, M2 and M3 are provided with three cabinet doors (not shown in the figure) in the corresponding cabinet door. The three switches M1, M2 and M3 are one-to-one correspondence with the three cabinet doors. The opening and closing state of the cabinet door can control the on-off of the corresponding switch M1, M2 and M3, and then control whether the voltage dividing resistor R1, R2 and R3 is connected to the variable resistance circuit 31, so that the total resistance value of the variable resistance circuit 31 changes.

[0045] Further, it can be observed that one end of the switch M1, M2 and M3 is connected with the fixed resistor R0 of the fixed resistance circuit 32, the other end of the switch M1 is connected with the voltage dividing resistor R1, the other end of the switch M2 is connected with the voltage dividing resistor R2, and the other end of the switch M3 is connected with the voltage dividing resistor R3. The voltage dividing resistors R1, R2 and R3 are connected in common and grounded. That is to say, the switches M1, M2 and M3 share a fixed resistor R0. When the opening and closing state of the cabinet door changes, the total resistance value of the variable resistance circuit 31 will change when the switches M1, M2 and M3 are in different on-off combination states, thereby causing the voltage division between the variable resistance circuit 31 and the fixed resistance circuit 32 to change and showing different voltage values, so as to output the required voltage signal to the input pin connected thereto.

[0046] For example, the resistance value of the fixed resistor R0 can be set to 30KΩ, the resistance value of the voltage dividing resistor R1 can be set to 44KΩ, the resistance value of the voltage dividing resistor R2 can be set to 30KΩ, and the resistance value of the voltage dividing resistor R2 can be set to 20KΩ. It must be ensured that the resistance values of the plurality of voltage dividing resistors are different.

[0047] Optionally, the number of cabinet doors in each cabinet door group described above is at least three; of course, the number of cabinet doors can be adjusted according to actual needs, and in principle, it is ensured that the cabinet door, the switch and the voltage dividing resistor are one-to-one corresponding, and the specific number of the cabinet door, the switch and the voltage dividing resistor is not limited too much in the application.

[0048] In one specific embodiment provided by the application, the opening and closing state of the cabinet door can control the on-off of the corresponding switch, and when the state of the cabinet door is open, the switch corresponding to the cabinet door is turned on, and when the state of the cabinet door is closed, the switch corresponding to the cabinet door is turned off.

[0049] For example, continue to refer to the switches M1, M2 and M3 in 3, when the state of the cabinet door corresponding to the switch M1 is open, the state of the cabinet door corresponding to the switch M2 is open, and the state of the cabinet door corresponding to the switch M3 is closed, the opening and closing state of the cabinet door group is open-open, at this time, the switch M1 and the switch M2 in the variable resistor circuit 31 are both in the on state, and the switch M3 is in the off state; similarly, the switch state of the cabinet door group can also be open-open, open-close, open-open, and different opening and closing states, and the corresponding switches M1, M2 and M3 also show different on or off states, and because the resistance values of the voltage dividing resistors R1, R2 and R3 are not equal to each other, different voltages are shown, so that the main control module 1 can collect the states of the cabinet doors of the register cabinet according to the voltage signal, and the opening and closing state of the cabinet door group is not enumerated too much in the application.

[0050] Of course, the state of the cabinet door can also be set to open when the switch corresponding to the cabinet door is turned off, and when the state of the cabinet door is closed, the switch corresponding to the cabinet door is turned on, and the above setting mode is feasible, and those skilled in the art should know.

[0051] As an optional implementation, please refer to Figure 4 The structure schematic diagram of the cabinet door state detection system provided by the embodiment of the application, the channel multiplexing module 2 further includes an enable pin (EN), and the main control module 1 further includes an enable control end (EN_0......EN_n), because the number of the channel multiplexing module 2 is multiple, the enable pin of each channel multiplexing module 2 is connected with the enable control end of the main control module 1, and the specific number of the channel multiplexing module 2 is not limited further in the application.

[0052] Further, the controlled end of each channel multiplexing module 2 can be connected with the same control end, and the corresponding Figure 4That is to say, the S1 pin of each channel multiplexing module 2 is connected with the S1 pin of the master control module 1, the S2 pin of each channel multiplexing module 2 is connected with the S2 pin of the master control module 1, and the S3 pin of each channel multiplexing module 2 is connected with the S3 pin of the master control module 1. When more analog channels need to be expanded, only the number of pins in the enable control end needs to be increased and connected with the enable pins (EN) in the channel multiplexing module 2, which reduces the demand for GPIO pins.

[0053] In an optional embodiment, the number of input pins in the channel multiplexing module 2 can be set to eight, and the control end of the master control module 1 includes three control pins, namely control pin S1, control pin S2 and control pin S3. Thus, by connecting the control end (S1, S2, S3) of the master control module 1 to the controlled end (S1, S2, S3) of the channel multiplexing module 2, the switching of eight analog channels (Y0-Y7) can be realized.

[0054] For example, the channel multiplexing module 2 described above can be set as a chip of model CD40511, and of course, other setting forms of chips capable of realizing eight-channel multiplexing switches are also feasible, and the present application does not make further limitation thereon.

[0055] Further, please refer to Figure 5 A specific embodiment diagram of the cabinet door state detection system provided by the embodiment of the present application is shown in the figure, which includes one master control module 1, two channel multiplexing modules 2, and eight input pins in the channel multiplexing module 2, each of which is connected with a corresponding cabinet door state feedback module 3.

[0056] In the embodiment, the master control module 1 is provided with a detection pin (ADC), a control end (control pin S1, control pin S2 and control pin S3), and an enable control end (enable pin EN_0 and enable pin EN_n).

[0057] Each channel multiplexing module 2 includes an output pin (ADC), a controlled end (controlled pin S1, controlled pin S2 and passive pin S3), an enable pin (EN), an input pin Y0, an input pin Y1, an input pin Y2, an input pin Y3, an input pin Y4, an input pin Y5, an input pin Y6 and an input pin Y7.

[0058] It can be observed that the detection pins (ADC) of the master module 1 are connected with the output pins (ADC) of the two channel multiplexing modules 2 respectively, the control pins S1 of the master module 1 are connected with the controlled pins S1 of the two channel multiplexing modules 2 respectively, the control pins S2 of the master module 1 are connected with the controlled pins S2 of the two channel multiplexing modules 2 respectively, the control pins S3 of the master module 1 are connected with the controlled pins S3 of the two channel multiplexing modules 2 respectively, the enable pin (EN_0) of the master module 1 is connected with the enable pin (EN) of one of the channel multiplexing modules 2, the enable pin (EN_n) of the master module 1 is connected with the enable pin (EN) of the other channel multiplexing module 2, and eight input pins are arranged in each channel multiplexing module 2, which are not enumerated herein.

[0059] Further, a corresponding cabinet door state feedback module 3 (not fully shown in the figure) is arranged for each input pin, and sixteen cabinet door state feedback modules 3 are arranged for the two channel multiplexing modules 2 correspondingly, each cabinet door state feedback module 3 is provided with three switches M1, M2 and M3, the three switches M1, M2 and M3 are correspondingly connected with three voltage dividing resistors R1, R2 and R3, and three cabinet doors are arranged in the corresponding cabinet doors of the three switches M1, M2 and M3, and the three switches M1, M2 and M3 are arranged one by one with the three cabinet doors, and the opening and closing state of the cabinet doors can control the on-off of the corresponding switches.

[0060] In the application, one end of the switches M1, M2 and M3 is connected with a fixed resistor R0 of a fixed resistor circuit 32, the other end of the switch M1 is connected with the voltage dividing resistor R1, the other end of the switch M2 is connected with the voltage dividing resistor R2, the other end of the switch M3 is connected with the voltage dividing resistor R3, and the voltage dividing resistors R1, R2 and R3 are connected in common and grounded, that is, the switches M1, M2 and M3 share one fixed resistor R0.

[0061] Optionally, the resistance value of the fixed resistor R0 can be set to 30KΩ, the resistance value of the voltage dividing resistor R1 can be set to 44KΩ, the resistance value of the voltage dividing resistor R2 can be set to 30KΩ, and the resistance value of the voltage dividing resistor R3 can be set to 20KΩ, so that the resistance values of the three voltage dividing resistors are not equal to each other.

[0062] The default preset voltage (VCC) is 3.3V, please refer to Figure 6 , and Figure 5The eight switch states provided by the embodiment are illustrated by taking one of the cabinet door state feedback modules 3 as an example. Since the cabinet door group is provided with three cabinet doors, corresponding to three switches, that is, corresponding to eight switch states, and the resistance values among the three voltage dividing resistors are not equal to each other, the voltage values exhibited by each switch state are not the same. The voltage values corresponding to different switch states can be calculated, so as to provide the main control module 1 with the cabinet door state of the registration cabinet for judgment.

[0063] Specifically, the main control module 1 judges the collected voltage value and the voltage values calculated in advance in the table. When a certain interval in the table is met, it means that the corresponding three cabinet doors are in a certain state. However, there may be certain errors in actual collection, so when the error between the collected voltage value and the voltage value in the table is within the preset range, it can be considered that the three cabinet doors corresponding to the cabinet door state feedback module 3 are in a certain state.

[0064] Taking the collected Vadc voltage of 1.25V as an example, the actual collected voltage meets the range of 1.23V±0.05V in STA4, so it is considered that the opening and closing state of the current cabinet door group meets the STA4 condition. Specifically, the switch M1 is turned on, the switch M2 is turned on, and the switch M3 is turned off. The situation of the three cabinet doors of the cabinet door group is that the door state of the cabinet door corresponding to the switch M1 is open, the door state of the cabinet door corresponding to the switch M2 is open, and the door state of the cabinet door corresponding to the switch M3 is closed. Of course, the state of each cabinet door can be judged according to the actual collected voltage combined with the table, and the present application will not be described in detail.

[0065] It can be understood that due to the internal wiring resistance and board card resistance of the registration cabinet, the voltage collected in actual application may have errors with the theoretically calculated voltage values in the table. Therefore, the data in the table needs to be calibrated according to the actual door state of the cabinet door, and the voltage values in the table are updated regularly, so as to realize accurate collection of the opening and closing state of each cabinet door.

[0066] Based on the above cabinet door state detection system, the present application further provides an intelligent registration cabinet. The opening and closing state of each cabinet door of the intelligent registration cabinet can be accurately collected through the cabinet door state detection system provided by the present application.

[0067] For other details of the intelligent registration cabinet implementation technical solution provided by the above embodiment, refer to the description of the cabinet door state detection system in the above embodiment, which will not be described here.

[0068] It can be understood that any combination of the technical features in the above embodiments can be made, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, however, as long as the combination of the technical features does not exist, it should be considered that it is within the scope of the description.

[0069] The above embodiments are merely exemplary embodiments adopted for illustrating the principles of the embodiments of the present application, however, the embodiments of the present application are not limited thereto. Various modifications and improvements can be made by those of ordinary skill in the art without departing from the spirit and essence of the embodiments of the present application, and these modifications and improvements are also considered as the protection scope of the embodiments of the present application.

Claims

1. A cabinet door status detection system, characterized by, The door state detection system comprises a master control module, a channel multiplexing module and a cabinet door state feedback module. The channel multiplexing module comprises an output pin, a controlled end and a plurality of input pins, the output pin is connected with the detection pin of the master control module, the controlled end is connected with the control end of the master control module, and a plurality of the input pins are connected with corresponding cabinet door state feedback modules; wherein a plurality of cabinet door groups are respectively and one-to-one provided with a plurality of the cabinet door state feedback modules, and the cabinet door group comprises a plurality of opening and closing states. The cabinet door state feedback module is used for outputting a voltage signal to the input pin connected therewith, and the voltage signal shows different voltage values according to different opening and closing states of the corresponding cabinet door group. The master control module is used for controlling the controlled end through the control end, so that the output pin is conducted with one of the input pins.

2. The cabinet door status detection system of claim 1, wherein, The cabinet door state feedback module comprises a variable resistance circuit and a fixed resistance circuit, and the variable resistance circuit is used for showing different resistance values according to different opening and closing states of the corresponding cabinet door group. The variable resistance circuit and the fixed resistance circuit are connected in series between a preset voltage and the ground, and the connection between the variable resistance circuit and the fixed resistance circuit is connected with the corresponding input pin, for outputting a voltage signal to the input pin connected therewith.

3. The cabinet door status detection system of claim 2, wherein, The variable resistance circuit comprises a plurality of switches and a plurality of voltage dividing resistors. The plurality of switches are respectively and one-to-one corresponding to a plurality of cabinet doors in the corresponding cabinet door group, and the on-off of the switch is controlled by the opening and closing state of the corresponding cabinet door; the plurality of voltage dividing resistors are respectively and one-to-one corresponding to the plurality of switches, and the resistance values of the plurality of voltage dividing resistors are different. Wherein, one end of the switch is connected with the fixed resistance circuit, and the other end of the switch is grounded through the corresponding voltage dividing resistor.

4. The cabinet door status detection system of claim 3, wherein, The number of cabinet doors in each cabinet door group is at least three.

5. The cabinet door status detection system of claim 3, wherein, When the state of the cabinet door is open, the switch corresponding to the cabinet door is turned on; when the state of the cabinet door is closed, the switch corresponding to the cabinet door is turned off.

6. The cabinet door status detection system of any one of claims 1-5, wherein, The channel multiplexing module further comprises an enable pin, and the master control module further comprises an enable control end. The number of the channel multiplexing modules is multiple, the enable control end is connected with the enable pins of the plurality of channel multiplexing modules, and the controlled ends of the plurality of channel multiplexing modules are all connected with the same control end.

7. The cabinet door status detection system of any one of claims 1-5, wherein, The number of the input pins in the channel multiplexing module is eight, and the control end in the master control module comprises three control pins.

8. An intelligent locker, characterized by The door state detection system comprises a master control module, a channel multiplexing module and a cabinet door state feedback module.

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