Express cabinet low-power-consumption system

Abstract

The utility model relates to a low-power-consumption system of an express cabinet, and belongs to the technical field of household appliance control. Comprising a main control module, a power supply module, a low-power-consumption trigger module and a lock control module which are integrated in a cabinet body, the main control module is electrically connected with the power supply module, the low-power-consumption trigger module and the lock control module. The power supply module is used for providing electric energy for the system, the low-power-consumption trigger module comprises a sensor induction sub-module and a switch sub-module, the sensor induction sub-module outputs a hardware trigger signal to the main control module when detecting that a human body approaches, and the switch sub-module outputs a hardware on-off signal according to a cabinet door closing state; the main control module controls the lock control module to open or close the door body of the express cabinet according to the trigger signal. The human body pyroelectric sensor is awakened only when a user approaches, the magnetic reed switch has no standby power consumption, and the power consumption of the trigger module is reduced compared with a traditional scheme.

Description

Technical Field

[0001] This utility model relates to a low-power system for express delivery lockers, belonging to the field of household appliance control technology. Background Technology

[0002] With the booming development of the e-commerce industry and the continuous increase in demand for last-mile delivery in communities, parcel lockers, as key devices for solving the "last mile" delivery problem, have gradually become widespread in homes and small communities. However, existing parcel lockers have revealed significant high power consumption issues in practical applications, severely restricting device reliability and user experience. Specific problems can be summarized as follows:

[0003] 1. Insufficient redundancy and durability of the power supply system.

[0004] Traditional parcel lockers mostly use a single mains power supply mode, or although they are equipped with backup power, they lack an efficient and seamless switching mechanism. On the one hand, when the mains power is interrupted, the backup power cannot be quickly connected, which can easily lead to system shutdown; on the other hand, backup power supplies (such as ordinary lead-acid batteries or unprotected lithium batteries) lack overcharge / over-discharge protection circuits, and long-term low-current discharge or abnormal charging and discharging will accelerate aging, requiring frequent replacement and significantly increasing user maintenance costs.

[0005] 2. The sensor module has both high standby power consumption and high false trigger rate.

[0006] Most existing parcel lockers use photoelectric sensors to detect user proximity and monitor locker door status. Photoelectric sensors rely on a constantly lit light source for detection and are susceptible to ambient light interference, resulting in high standby power consumption and a high false trigger rate. Locker door status detection often uses mechanical contact switches, which are prone to wear from repeated opening and closing and cannot output stable low / high level signals through simple circuits.

[0007] Traditional parcel lockers use LCD or LED displays to show information such as pickup codes and battery levels in real time. These displays require continuous power to maintain backlighting, further increasing overall system energy consumption. While existing technologies attempt to reduce power consumption through software hibernation strategies (such as timed hibernation and conditional wake-up), their limitations are significant. Software hibernation relies on microcontroller program control, and the wake-up delay is typically ≥100ms, affecting user operation smoothness. For example, the existing patent announcement number CN209992844U discloses a low-power parcel locker storage and retrieval control system. The CPU module is connected to an RFID module for barcode scanning, a CPU module is connected to a voice module for voice playback, and a CPU module is connected to a wake-up button for system wake-up and power supply. However, the voice wake-up function has a certain delay, affecting user operation smoothness.

[0008] In summary, there is an urgent need for a low-power system based on improvements in hardware structure and circuit design to achieve microampere-level low-power operation under normal system conditions, fundamentally improving the backup power supply's endurance and equipment reliability from a hardware perspective. Utility Model Content

[0009] The purpose of this invention is to propose a low-power system for express delivery lockers. By optimizing the circuit, sensor triggering mechanism, and lock control drive method, and combining it with a low-power main control chip, the system achieves microampere-level power consumption under normal conditions, and significantly improves the power supply life.

[0010] The present invention discloses a low-power system for a parcel locker, comprising a main control module, a power supply module, a low-power trigger module, and a lock control module integrated within the locker body. The main control module is electrically connected to the power supply module, the low-power trigger module, and the lock control module. The power supply module provides power to the system. The low-power trigger module includes a sensor sensing submodule and a switch submodule. When the sensor sensing submodule detects a human approaching, it outputs a hardware trigger signal to the main control module. The switch submodule outputs a hardware on / off signal based on the locker door's closed state. The main control module controls the lock control module to open or close the parcel locker door according to the trigger signal.

[0011] Preferably, the sensor sensing submodule is a human body pyroelectric infrared sensor, and its OUT pin is connected to the external interrupt pin of the main control module.

[0012] Preferably, the switch submodule is a reed switch, installed at the contact position between the cabinet door frame and the door body.

[0013] Preferably, the lock control module includes an electronic lock body and a lock drive circuit; the electronic lock body is an electromagnetic lock; the lock drive circuit includes a transistor switching circuit, which is controlled by the main control module to turn on the transistor and immediately cut off the power after driving the electronic lock body to move.

[0014] Preferably, the power supply module is a rechargeable lithium battery, and the power supply module is also connected to a battery protection circuit, which includes an overcharge protection chip and an over-discharge protection field-effect transistor, used to limit the upper limit of the charging voltage and the lower limit of the discharging voltage of the power supply module.

[0015] Preferably, the main control module uses an STM32L051 low-power microcontroller with a built-in hardware real-time clock (RTC) and a low-power timer (LPTIM).

[0016] Preferably, the electronic lock body is a 5V electromagnetic lock.

[0017] The low-power system for express delivery lockers described in this utility model has the following beneficial effects:

[0018] Trigger power consumption drops sharply: The human body pyroelectric sensor (static current ≤3μA) is only woken up when the user approaches, the reed switch has no standby power consumption, and the power consumption of the trigger module is reduced compared with traditional solutions.

[0019] Zero standby time for lock control: The electromagnetic lock is powered only when it is in operation, which reduces power consumption by 99% compared to traditional continuously powered lock bodies and improves anti-interference ability.

[0020] Minimal sleep mode for main controller: Low-power main controller with normal current ≤3mA, hardware wake-up response ≤1s, and reduced power consumption of the main controller module compared to traditional solutions.

[0021] Ensuring long standby time, in low power mode users can charge the battery once every 50-60 days (12V 10000MAH capacity), and in super power saving mode users can charge the battery once every 200-365 days (12V 10000MAH capacity), greatly facilitating user use. Attached Figure Description

[0022] Figure 1 The circuit diagram of the main control module connection in this utility model;

[0023] Figure 2 : Circuit diagram of cabinet control in this utility model;

[0024] Figure 3 Circuit diagram of the low-power trigger module in this utility model;

[0025] Figure 4 Circuit diagram of the control module in this utility model;

[0026] Figure 5 The circuit diagram of the transistor driving circuit in this utility model;

[0027] In the diagram: 1. Main control module; 2. Power supply module; 3. Low power trigger module; 4. Lock control module; 5. Cabinet. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0029] Example 1:

[0030] like Figures 1-2As shown, the present invention discloses a low-power system for a parcel locker, comprising: a main control module 1, a power supply module 2, a low-power trigger module 3, and a lock control module 4 integrated within the locker body 5; the main control module 1 is electrically connected to the power supply module 2, the low-power trigger module 3, and the lock control module 4 respectively; the power supply module 2 is used to provide power to the system; the low-power trigger module 3 includes a sensor sensing submodule and a switch submodule, wherein the sensor sensing submodule outputs a hardware trigger signal to the main control module 1 when it detects a human body approaching; the switch submodule outputs a hardware on / off signal based on the locker door being closed; and the main control module 1 controls the lock control module 4 to open or close the parcel locker door according to the trigger signal.

[0031] The sensor sensing submodule is a human body pyroelectric infrared sensor. The model is selected according to actual needs; in this embodiment, model 003K4 is selected. It has low power consumption: static current ≤3μA, and its OUT pin is connected to the external interrupt pin of the main control module 1. Figure 3 As shown, when someone enters the monitored area, the pyroelectric infrared sensing module IC1 is triggered, outputting a high level with a pulse width of 2-5s, and the transistor Q1 is turned on. As long as the human body moves slightly within the module's monitoring area, IC1 continuously outputs a signal. This signal is input to the I / O terminal of the control module's microcontroller IC3. After being identified and judged by the control module's microcontroller IC3, a drive command signal is issued to drive the lock control module IC4 to perform the opening action.

[0032] like Figure 4 As shown, main control module 1 uses an STM32L051 low-power microcontroller, with a built-in hardware real-time clock (RTC) and a low-power timer (LPTIM). Its core pin assignments are as follows:

[0033] External interrupt pin: PA0 (EXTI 0), connected to the OUT signal of the sensor sensing submodule of low-power trigger module 3;

[0034] Cabinet door status detection pin: PA1 (GPIO input), connected to the output signal of the reed switch;

[0035] Latch control drive pin: PB0 (GPIO output), connected to the base of transistor Q3 in latch control module 4 through a current limiting resistor;

[0036] Power supply pins: VDD, VSS (GND), connected to the system power supply bus (VCC).

[0037] Lock control module 4 includes a 5V electromagnetic lock and a transistor drive circuit, with the specific connections as follows:

[0038] like Figure 5As shown, the base of transistor Q3 is connected to the PB0 pin of the main control module 1 through the current-limiting resistor R24. The control signal MDRV0 from the main control module 1 is converted into the drive level required by Q4 by transistor Q3. When MDRV0 is high, Q4 is turned on, and the electromagnetic lock connected between VMOT and MOT0 opens the cabinet door. After the item is retrieved, the cabinet door is closed, the reed switch is turned on and outputs a low-level signal, the PB0 pin of the main control module 1 is pulled low, Q3 is turned off, the lock body is de-energized, and the low-power module is turned on.

[0039] The cabinet door status sensor is a reed switch, installed at the contact point between the cabinet door frame and the door body; the electronic lock body is an electromagnetic lock.

[0040] When the cabinet door is closed, the permanent magnet approaches the reed switch to turn it on, and the PA1 pin detects a low level; when the cabinet door needs to be opened, the reed switch is turned off, and the PA1 pin is pulled up to a high level through the pull-up resistor, and the main control module 1 determines the cabinet door status accordingly.

[0041] Power supply module 2 is a 12V battery power supply; power supply module 2 is also connected to a battery protection circuit, which includes an overcharge protection chip and an over-discharge protection field-effect transistor, used to limit the upper limit of the charging voltage and the lower limit of the discharging voltage of power supply module 2.

[0042] System workflow:

[0043] Normal sleep mode: The STM32L051 microcontroller is in stop mode and will immediately go into sleep mode if there is no abnormality.

[0044] User-triggered wake-up: When the pyroelectric sensor detects the approach of a user, the OUT pin outputs a high level to trigger an external interrupt on PA0. The STM32L051 wakes up and confirms that the cabinet door is closed via the PA1 pin.

[0045] Unlocking and Display: The main control module 1 drives the electromagnetic lock to open the cabinet door by outputting a high level through the PB0 pin.

[0046] Hibernation recovery: After the user retrieves the item and closes the cabinet door, the reed switch is turned on, the main control module 1 enters the stop mode, and the system returns to the microampere-level low power consumption state.

[0047] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A low-power system for express delivery lockers, characterized in that, include: The main control module (1), power supply module (2), low power trigger module (3) and lock control module (4) are integrated in the cabinet (5); the main control module (1) is electrically connected to the power supply module (2), the low power trigger module (3) and the lock control module (4) respectively; the power supply module (2) is used to provide power to the system; the low power trigger module (3) includes a sensor sensing submodule and a switch submodule, wherein the sensor sensing submodule outputs a hardware trigger signal to the main control module (1) when it detects a human body approaching; the switch submodule outputs a hardware on / off signal through the cabinet door closing state; the main control module (1) controls the lock control module (4) to open or close the express cabinet door according to the trigger signal.

2. The low-power system for a parcel locker according to claim 1, characterized in that, The sensor sensing submodule is a human pyroelectric infrared sensor, and its OUT pin is connected to the external interrupt pin of the main control module (1).

3. The low-power system for a parcel locker according to claim 1, characterized in that, The switch submodule is a reed switch, installed at the contact point between the cabinet door frame and the door body.

4. The low-power system for a parcel locker according to claim 1, characterized in that, The lock control module (4) includes an electronic lock body and a lock drive circuit; the electronic lock body is an electromagnetic lock; the lock drive circuit includes a transistor switching circuit, which is controlled by the main control module (1) to turn on the transistor and drive the electronic lock body to move and then immediately cut off the power.

5. The low-power system for a parcel locker according to claim 1, characterized in that, The power supply module (2) is a rechargeable lithium battery. The power supply module (2) is also connected to a battery protection circuit. The battery protection circuit includes an overcharge protection chip and an over-discharge protection field-effect transistor, which are used to limit the upper limit of the charging voltage and the lower limit of the discharging voltage of the power supply module (2).

6. The low-power system for a parcel locker according to claim 1, characterized in that, The main control module (1) adopts an STM32L051 low-power microcontroller with a built-in hardware real-time clock (RTC) and a low-power timer (LPTIM).

7. A low-power system for a parcel locker according to claim 4, characterized in that, The electronic lock body is a 5V electromagnetic lock.

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