An electromagnetic induction control system and method for intelligent door lock linkage with household appliances

Abstract

The application discloses an electromagnetic induction control system and method for linkage of intelligent door lock and household appliances, comprising: a non-contact electromagnetic induction detection unit, a linkage execution unit, a communication unit and a main control unit, the main control unit is connected with the non-contact electromagnetic induction detection unit, the linkage execution unit and the communication unit, compared with the prior art, the system realizes high-precision, high-stability and long-life door lock state detection and household appliance linkage through the cooperation of multiple units; the main control unit is used as the core, a plurality of independent non-contact electromagnetic induction units are used to realize contactless, crosstalk-free and anti-interference state acquisition, and a dynamic calibration algorithm is used to improve long-term reliability; the linkage execution unit has a perfect protection mechanism; the overall system realizes integrated intelligent control of non-inductive operation, accurate identification, rapid linkage and multiple safety protection, and effectively solves the problems of large wear, easy interference, high false triggering and weak linkage capability of the traditional door lock detection scheme.

Description

Technical Field

[0001] This invention relates to the field of smart home control technology, specifically to an electromagnetic induction control system and method for linking smart door locks with home appliances. Background Technology

[0002] With the popularization of smart homes, smart door locks, as entry points for home security, directly impact the safety and convenience of use due to their accuracy in status detection and reliability in linkage. Existing door lock status detection and linkage solutions generally suffer from significant drawbacks: traditional mechanical contact-based detection is prone to wear and tear, has a short lifespan, poor waterproof and dustproof capabilities, and is susceptible to poor contact and false triggering with prolonged use; Hall effect and magnetoresistive sensors rely on magnetic fields and are easily affected by external ferromagnetic materials and electromagnetic interference, resulting in insufficient detection stability; most solutions can only identify two states—open and closed—and cannot capture finer actions such as pressing and touching; multi-node detection layouts are prone to mechanical and electromagnetic crosstalk, leading to interference between adjacent points; status detection and appliance linkage are separated, resulting in high system response delays, low integration control, and difficulty in achieving seamless, stable, and rapid intelligent linkage effects. Summary of the Invention

[0003] The purpose of this invention is to address the problems of traditional solutions, such as easy wear and tear, easy interference, large crosstalk, single state recognition, and slow linkage response. To overcome these shortcomings, an electromagnetic induction control system and method for linking smart door locks with home appliances is proposed.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] An electromagnetic induction control system for linking smart door locks with home appliances includes:

[0006] The non-contact electromagnetic induction detection unit includes multiple sets of non-contact electromagnetic induction modules. Each set of non-contact electromagnetic induction modules is connected to a corresponding metal moving part of the door lock to collect door lock action signals. At the same time, based on electromagnetic resonance and eddy current effects, it detects the displacement or deformation of the metal moving part non-contactly and outputs the corresponding status detection signal. The non-contact electromagnetic induction detection unit is connected to the main control unit.

[0007] The linkage execution unit is used to receive control commands from the main control unit, drive the door lock to perform corresponding mechanical actions, and at the same time detect the motor current to realize overload protection and stall protection.

[0008] The communication unit is used to enable data interaction and control command transmission between the main control unit and external home appliances;

[0009] The main control unit is connected to the non-contact electromagnetic induction detection unit, the linkage execution unit, and the communication unit. It is used to receive the status detection signals output by each group of non-contact electromagnetic induction modules, determine the door lock status based on the status detection signals, generate corresponding linkage control commands, and send the linkage control commands to the corresponding home appliances through the communication unit.

[0010] As a further preferred embodiment of the present invention, the non-contact electromagnetic induction module consists of an induction coil and a resonant detection circuit. The induction coil adopts a layered stacked coil structure, with the upper layer serving as a detection coil and the lower layer as a reference coil. The detection coil in the upper layer adopts a central dense winding process, with the inner windings of the coil being densified to concentrate magnetic field energy, enhance the eddy current resonant signal generated by the micro-deformation of the metal latch and metal panel, and improve the sensitivity of micro-displacement detection. An epoxy fiberglass insulating partition is set between two adjacent sets of non-contact electromagnetic induction modules as an isolation structure, which blocks the conduction of mechanical deformation and electromagnetic coupling crosstalk between the non-contact electromagnetic induction modules. Several non-contact electromagnetic induction modules are respectively connected to the main latch, auxiliary latch, safety structure, and pressing panel of the door lock.

[0011] As a further preferred embodiment of the present invention, the linkage execution unit includes a door lock drive circuit and a motor current detection circuit; the door lock drive circuit is used to drive the door lock motor to perform a switching action; the motor current detection circuit is used to collect the motor operating current in real time and feed it back to the main control unit; the main control unit performs overload protection or stall protection control based on the motor operating current.

[0012] As a further preferred embodiment of the present invention, the communication unit includes a data transceiver interface and a hardware reset interface; the data transceiver interface is used for uploading door lock status information, fault information and / or operating parameters, as well as issuing control commands for home appliances; the hardware reset interface is used for receiving reset signals from external devices and performing forced reset on the main control unit.

[0013] As a further preferred embodiment of the present invention, it also includes a light panel indicator unit and a power supply unit; the light panel indicator unit is connected to the main control unit and is used to output a corresponding light indicator signal according to the door lock status; the power supply unit is used to supply power to each unit and includes a DC-DC step-down converter circuit, an LDO voltage regulator circuit, an input voltage detection circuit, and an overcurrent protection circuit.

[0014] An electromagnetic induction control method for linking smart door locks with home appliances includes:

[0015] S1. The displacement or deformation of the metal moving parts at the corresponding position of the door lock is detected non-contactly by multiple sets of non-contact electromagnetic induction modules, and corresponding status detection signals are generated and output to the main control unit.

[0016] S2. The main control unit receives the status detection signals output by each group of non-contact electromagnetic induction modules, and performs noise filtering and dynamic threshold calibration on the status detection signals to eliminate signal drift caused by environmental changes and long-term use.

[0017] S3. The main control unit comprehensively determines the current state of the door lock based on the calibrated state detection signal; the current state of the door lock includes at least the door lock open state, the door lock closed state, and the effective pressing state;

[0018] S4. The main control unit generates corresponding linkage control commands based on the current state of the door lock and the preset linkage strategy.

[0019] S5. Send the linkage control command to the corresponding home appliance through the communication unit to trigger the home appliance to perform the scene action corresponding to the current state of the door lock;

[0020] S6. During the execution of the door lock drive action, the main control unit obtains the drive current of the door lock motor in real time through the motor current detection circuit of the linkage execution unit. When the drive current exceeds the preset overload threshold or stall threshold, the main control unit immediately cuts off the drive output and reports the fault information through the communication unit.

[0021] S7. When the main control unit experiences a program error or crash, it receives a reset signal from an external device through the hardware reset interface of the communication unit and performs a forced hardware reset on the main control unit.

[0022] As a further preferred embodiment of the present invention, the dynamic threshold calibration specifically includes: acquiring the baseline signal of the non-contact electromagnetic induction module in the static state of the door lock and updating the static baseline value in real time; adaptively generating a detection and judgment threshold based on the updated static baseline value; and determining that the metal moving part has been displaced or deformed when the difference between the signal and the baseline exceeds the judgment threshold.

[0023] As a further preferred embodiment of the present invention, the comprehensive determination of the current state of the door lock specifically includes:

[0024] When the detection signal of the electromagnetic induction unit corresponding to the main bolt reaches or exceeds the preset opening threshold, the door is determined to be in the open state.

[0025] When the detection signal of the electromagnetic induction unit corresponding to the main bolt falls back to the preset closing threshold range, the door is determined to be in the closed state.

[0026] When the detection signal of the electromagnetic induction unit corresponding to the non-locking tongue shows a local micro-deformation change and the change amplitude does not reach the opening threshold, it is determined to be a valid pressing state.

[0027] As a further preferred embodiment of the present invention, in step S1, the main control unit uses a polling sampling method for multiple sets of electromagnetic induction units, and only one set of electromagnetic induction units is in working state at the same time, so as to avoid electromagnetic crosstalk generated when multiple electromagnetic induction units work at the same time.

[0028] As a further preferred embodiment of the present invention, in step S6, the main control unit identifies the fault type based on the drive current. When a motor stall, open circuit, or overload fault is identified, the corresponding fault type information is reported through the communication unit to achieve accurate location of the door lock fault. The communication unit also uploads the door lock status information, fault information, and operating parameters to the main control unit of the home appliance in real time, and receives the linkage strategy update instruction and scene trigger instruction issued by the main control unit of the home appliance.

[0029] The electromagnetic induction control system and method for linking smart door locks and home appliances proposed in this invention have the following advantages compared with the prior art:

[0030] The non-contact electromagnetic induction module involved in this invention employs a non-contact electromagnetic induction detection method based on electromagnetic resonance and eddy current effects. During the detection process, there is no mechanical contact or friction between the induction coil and the moving metal parts of the door lock, fundamentally eliminating the wear problem of traditional mechanical contact detection schemes and significantly extending the service life of the door lock status detection system.

[0031] 1. This invention senses the displacement and deformation of metal parts by sensing the intrinsic parameter changes of electromagnetic resonance and eddy current effect. It has a natural anti-interference advantage against ferromagnetic materials and electromagnetic radiation in the environment. Combined with the polling sampling working mode, only one set of detection units works at the same time, which further avoids mutual interference of multiple magnetic fields and ensures the stability and reliability of the detection results.

[0032] 2. This invention reduces crosstalk caused by mechanical deformation transmission during multi-point operation by setting up a mechanical isolation structure between non-contact electromagnetic induction modules; at the same time, it adopts a polling sampling strategy to completely isolate the electromagnetic excitation of each detection unit in the time dimension, avoid mutual contamination of multiple detection signals, and make the multi-point detection results accurate.

[0033] 3. This invention uses a non-contact electromagnetic induction detection unit to detect the displacement and deformation of different metal moving parts of the door lock. It can not only distinguish the open and closed state of the door lock, but also identify effective pressing, light touching and other micro-motion operations, making the door lock an interactive entry point for smart homes and providing a technical foundation for scene linkage.

[0034] 4. This invention adopts a single main control unit, integrating door lock status detection, status judgment, linkage decision and command issuance into the same closed-loop control system, eliminating the communication relay link between multiple subsystems in the traditional solution, and greatly reducing linkage response delay; at the same time, the comprehensive configuration of safety mechanisms such as real-time motor current monitoring, overload / locked rotor protection, and remote hardware reset enables the system to have a complete safety protection capability while ensuring rapid response.

[0035] 5. This invention supports active fault reporting and remote hardware reset functions through the communication unit. When the system crashes abnormally, the main controller of the home appliance can remotely restore the system operation through the reset pin without physical disassembly and repair, which significantly reduces maintenance costs and improves system reliability.

[0036] 6. This invention uses a dynamic calibration algorithm built into the main control unit to automatically compensate for temperature drift, humidity drift, and mechanical deformation of metal parts during long-term use, so that the system can maintain sub-millimeter level detection accuracy throughout its entire life cycle, overcoming the problem of accuracy decay after long-term use of traditional solutions. Attached Figure Description

[0037] Figure 1 This is a block diagram of the overall system composition of the present invention;

[0038] Figure 2 This is a block diagram of the communication unit of the present invention;

[0039] Figure 3 This is a block diagram of the main control unit and the indicator unit of the present invention;

[0040] Figure 4 This is a block diagram of the power supply unit of the present invention;

[0041] Figure 5 This is a schematic diagram of the non-contact electromagnetic induction module structure of the present invention. Detailed Implementation

[0042] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0043] This invention discloses an electromagnetic induction control system and method for intelligent door lock and home appliance linkage; based on non-contact electromagnetic induction, the door lock status detection and home appliance linkage system achieves high-precision detection of door lock status through non-contact electromagnetic induction and completes intelligent linkage control with home appliances, solving the problems of easy wear and tear, easy interference, large crosstalk, single status recognition, and slow linkage response of traditional solutions.

[0044] Example 1: Combining Figure 1-5 An electromagnetic induction control system for linking smart door locks with home appliances includes: The non-contact electromagnetic induction detection unit includes multiple sets of non-contact electromagnetic induction modules. Each set of non-contact electromagnetic induction modules is connected to a corresponding metal moving part of the door lock to collect door lock action signals. At the same time, based on electromagnetic resonance and eddy current effects, it detects the displacement or deformation of the metal moving part non-contactly and outputs the corresponding status detection signal. The non-contact electromagnetic induction detection unit is connected to the main control unit.

[0046] The non-contact electromagnetic induction module consists of an induction coil and a resonant detection circuit. The induction coil adopts a layered stacked coil structure, with the upper layer serving as a detection coil and the lower layer as a reference coil. The upper detection coil uses a central dense winding process, with the inner windings being denser to concentrate magnetic field energy, enhance the eddy current resonant signal generated by the micro-deformation of the metal latch and metal panel, and improve the sensitivity of micro-displacement detection. An epoxy fiberglass insulating partition is set between adjacent groups of non-contact electromagnetic induction modules as an isolation structure, which blocks the conduction of mechanical deformation and electromagnetic coupling crosstalk between the non-contact electromagnetic induction modules. Several non-contact electromagnetic induction modules are respectively connected to the main latch, secondary latch, safety structure, and push panel of the door lock.

[0047] The linkage execution unit is used to receive control commands from the main control unit, drive the door lock to perform corresponding mechanical actions, and at the same time detect the motor current to realize overload protection and stall protection.

[0048] The linkage execution unit includes a door lock drive circuit and a motor current detection circuit. The door lock drive circuit is used to drive the door lock motor to perform switching actions. The motor current detection circuit is used to collect the motor operating current in real time and feed it back to the main control unit. The main control unit performs overload protection or stall protection control based on the motor operating current. When overcurrent, overload, or stall is detected, the main control unit immediately cuts off the drive output to achieve hardware-level safety protection, prevent motor damage or door lock mechanical structure jamming, and ensure safe and stable operation of the door lock.

[0049] The communication unit enables data interaction, control command transmission, and fault status reporting between the main control unit and the smart home appliance main control unit. Key data such as current sampling and operating status of the motor drive unit can be fed back to the home appliance main control unit in real time via the communication link. When a system anomaly occurs, the main control unit can proactively report fault information, and the home appliance main control unit can also perform a forced reset of the main control unit via a dedicated hardware reset pin, quickly restoring system operation without disassembly, thus improving system reliability and maintainability. The motor drive unit integrates a high-precision current sampling circuit, which can monitor the motor's operating current in real time. By collecting current data, the main control unit can quickly identify fault types such as motor stall and open circuit, and report fault information through the communication unit, achieving precise location of door lock faults.

[0050] The communication unit includes a data transceiver interface and a hardware reset interface; the data transceiver interface is used to upload door lock status information, fault information and / or operating parameters, as well as to send control commands for home appliances; the hardware reset interface is used to receive reset signals from external devices and perform forced reset on the main control unit.

[0051] The main control unit is connected to the non-contact electromagnetic induction detection unit, the linkage execution unit, and the communication unit. It is used to poll and sample multiple sets of non-contact electromagnetic induction modules, receive status signals, and perform noise filtering and dynamic threshold calibration. Based on the sampling results, it comprehensively determines the door lock status and generates home appliance control commands according to the preset linkage strategy. It sends commands to home appliances through the communication unit to realize the automatic linkage between the door lock and home appliances. At the same time, it controls the linkage execution unit, the light panel indicator unit, and the power supply unit to complete the closed-loop management of the entire system.

[0052] The light panel indicator unit is connected to the main control unit. Based on the door lock status and system working mode, it displays the door lock's open, closed, pressed, or fault status in real time through light color, brightness, or flashing mode, providing users with intuitive and visual interaction.

[0053] The power supply unit supplies power to all units, including a DC-DC step-down converter circuit, an LDO voltage regulator circuit, an input voltage detection circuit, and an overcurrent protection circuit. The input power is converted from DC to DC and then regulated by an LDO to provide stable power to the main control unit. It also provides the corresponding operating voltage to the non-contact electromagnetic induction detection unit, communication unit, and linkage execution unit. The power supply unit has input voltage detection, overcurrent protection, overvoltage protection, and thermal protection functions to ensure stable and reliable power supply to the system. It is also equipped with power-on reset and power sequence control to ensure a smooth start-up of the system and avoid sampling interference caused by voltage fluctuations.

[0054] An electromagnetic induction control method for linking smart door locks with home appliances includes:

[0055] S1. Multiple sets of non-contact electromagnetic induction modules are used to detect the displacement or deformation of the metal moving parts at the corresponding positions of the door lock in a non-contact manner, generating corresponding status detection signals and outputting them to the main control unit. The main control unit uses a polling sampling method for the multiple sets of electromagnetic induction units, and only one set of electromagnetic induction units is in working state at any given time to avoid electromagnetic crosstalk caused by multiple electromagnetic induction units working simultaneously.

[0056] S2. The main control unit receives the status detection signals output by each group of non-contact electromagnetic induction modules, and performs noise filtering and dynamic threshold calibration on the status detection signals to eliminate signal drift caused by environmental changes and long-term use.

[0057] The dynamic threshold calibration specifically refers to collecting the baseline signal of the non-contact electromagnetic induction module in the static state of the door lock, and updating the static baseline value in real time; adaptively generating a detection judgment threshold based on the updated static baseline value; when the difference between the signal and the baseline exceeds the judgment threshold, it is determined that the metallic moving component has displacement or deformation.

[0058] S3. The main control unit comprehensively determines the current state of the door lock according to the calibrated state detection signal; the current state of the door lock at least includes a door lock open state, a door lock closed state, and an effective pressing state.

[0059] The comprehensively determining the current state of the door lock specifically includes:

[0060] When the detection signal of the electromagnetic induction unit corresponding to the main bolt reaches or exceeds the preset opening threshold, it is determined as the door lock open state.

[0061] When the detection signal of the electromagnetic induction unit corresponding to the main bolt falls back into the range of the preset closing threshold, it is determined as the door lock closed state.

[0062] When the detection signal of the electromagnetic induction unit corresponding to the non-bolt shows a local micro-deformation change and the change amplitude does not reach the opening threshold, it is determined as the effective pressing state.

[0063] S4. The main control unit generates a corresponding linkage control instruction according to the current state of the door lock and a preset linkage strategy.

[0064] The linkage control instructions include but are not limited to:

[0065] When it is determined as the door lock open state, the main control unit generates a control instruction for triggering the household electrical appliance to enter a home mode; for example, automatically turning on devices such as lights, air conditioners, and curtains.

[0066] When it is determined as the door lock closed state, the main control unit generates a control instruction for triggering the household electrical appliance to enter an away mode; for example, turning off non-essential loads and starting security arming.

[0067] When it is determined as the effective pressing state, the main control unit generates a control instruction for triggering operations such as temporary unlocking, scene switching or permission verification.

[0068] The specific linkage behavior supports user-defined configuration, and is not limited to the above examples. The entire system adopts closed-loop control, with continuous sampling, real-time calibration and dynamic response, so as to realize imperceptible, stable and wear-free door lock state detection and intelligent household electrical appliance linkage.

[0069] S5. The linkage control instruction is sent to the corresponding household electrical appliance through the communication unit, so as to trigger the household electrical appliance to execute the scene action corresponding to the current state of the door lock.

[0070] S6. During the execution of the door lock drive action, the main control unit obtains the drive current of the door lock motor in real time through the motor current detection circuit of the linkage execution unit. When the drive current exceeds the preset overload threshold or stall threshold, the main control unit immediately cuts off the drive output and reports the fault information through the communication unit.

[0071] The main control unit identifies the fault type based on the drive current. When a motor stall, open circuit, or overload fault is detected, the corresponding fault type information is reported through the communication unit to achieve accurate location of the door lock fault. The communication unit also uploads the door lock status information, fault information, and operating parameters to the main control unit of the home appliance in real time, and receives the linkage strategy update instructions and scene trigger instructions issued by the main control unit of the home appliance.

[0072] S7. When the main control unit experiences a program error or crash, it receives a reset signal from an external device through the hardware reset interface of the communication unit and performs a forced hardware reset on the main control unit.

[0073] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the above embodiments do not limit the present invention in any way, and all technical solutions obtained by equivalent substitution or equivalent transformation fall within the protection scope of the present invention.

Claims

1. An electromagnetic induction control system for linking smart door locks with home appliances, characterized in that, include: The non-contact electromagnetic induction detection unit includes multiple sets of non-contact electromagnetic induction modules. Each set of non-contact electromagnetic induction modules is connected to a corresponding metal moving part of the door lock to collect door lock action signals. At the same time, based on electromagnetic resonance and eddy current effects, it detects the displacement or deformation of the metal moving part non-contactly and outputs the corresponding status detection signal. The non-contact electromagnetic induction detection unit is connected to the main control unit. The linkage execution unit is used to receive control commands from the main control unit, drive the door lock to perform corresponding mechanical actions, and at the same time detect the motor current to realize overload protection and stall protection. The communication unit is used to enable data interaction and control command transmission between the main control unit and external home appliances; The main control unit is connected to the non-contact electromagnetic induction detection unit, the linkage execution unit, and the communication unit. It is used to receive the status detection signals output by each group of non-contact electromagnetic induction modules, determine the door lock status based on the status detection signals, generate corresponding linkage control commands, and send the linkage control commands to the corresponding home appliances through the communication unit.

2. The system according to claim 1, characterized in that, The non-contact electromagnetic induction module consists of an induction coil and a resonant detection circuit. The induction coil adopts a layered stacked coil structure, with the upper layer serving as a detection coil and the lower layer as a reference coil. The detection coil in the upper layer adopts a central dense winding process. An epoxy fiberglass insulating partition is set between two adjacent groups of non-contact electromagnetic induction modules as an isolation structure. Several non-contact electromagnetic induction modules are respectively connected to the main latch, auxiliary latch, safety structure, and pressing panel of the door lock.

3. The system according to claim 1, characterized in that, The linkage execution unit includes a door lock drive circuit and a motor current detection circuit; the door lock drive circuit is used to drive the door lock motor to perform switching actions; the motor current detection circuit is used to collect the motor operating current in real time and feed it back to the main control unit; the main control unit performs overload protection or stall protection control based on the motor operating current.

4. The system according to claim 1, characterized in that, The communication unit includes a data transceiver interface and a hardware reset interface; the data transceiver interface is used to upload door lock status information, fault information and / or operating parameters, as well as to send control commands for home appliances; the hardware reset interface is used to receive reset signals from external devices and perform forced reset on the main control unit.

5. The system according to claim 1, characterized in that, It also includes a light panel indicator unit and a power supply unit; the light panel indicator unit is connected to the main control unit and is used to output corresponding light indicator signals according to the door lock status; the power supply unit is used to supply power to each unit, including a DC-DC step-down converter circuit, an LDO voltage regulator circuit, an input voltage detection circuit, and an overcurrent protection circuit.

6. An electromagnetic induction control method for linking smart door locks with home appliances, characterized in that, include: S1. The displacement or deformation of the metal moving parts at the corresponding position of the door lock is detected non-contactly by multiple sets of non-contact electromagnetic induction modules, and corresponding status detection signals are generated and output to the main control unit. S2. The main control unit receives the status detection signals output by each group of non-contact electromagnetic induction modules, and performs noise filtering and dynamic threshold calibration on the status detection signals to eliminate signal drift caused by environmental changes and long-term use. S3. The main control unit comprehensively determines the current state of the door lock based on the calibrated state detection signal; the current state of the door lock includes at least the door lock open state, the door lock closed state, and the effective pressing state; S4. The main control unit generates corresponding linkage control commands based on the current state of the door lock and the preset linkage strategy. S5. Send the linkage control command to the corresponding home appliance through the communication unit to trigger the home appliance to perform the scene action corresponding to the current state of the door lock; S6. During the execution of the door lock drive action, the main control unit obtains the drive current of the door lock motor in real time through the motor current detection circuit of the linkage execution unit. When the drive current exceeds the preset overload threshold or stall threshold, the main control unit immediately cuts off the drive output and reports the fault information through the communication unit. S7. When the main control unit experiences a program error or crash, it receives a reset signal from an external device through the hardware reset interface of the communication unit and performs a forced hardware reset on the main control unit.

7. The method according to 6, characterized in that, The dynamic threshold calibration specifically includes: acquiring the baseline signal of the non-contact electromagnetic induction module in the static state of the door lock and updating the static baseline value in real time; adaptively generating a detection and judgment threshold based on the updated static baseline value; and determining that the metal moving part has been displaced or deformed when the difference between the signal and the baseline exceeds the judgment threshold.

8. The method according to 6, characterized in that, The comprehensive determination of the current state of the door lock specifically includes: When the detection signal of the electromagnetic induction unit corresponding to the main bolt reaches or exceeds the preset opening threshold, the door is determined to be in the open state. When the detection signal of the electromagnetic induction unit corresponding to the main bolt falls back to the preset closing threshold range, the door is determined to be in the closed state. When the detection signal of the electromagnetic induction unit corresponding to the non-locking tongue shows a local micro-deformation change and the change amplitude does not reach the opening threshold, it is determined to be a valid pressing state.

9. The method according to 6, characterized in that, In step S1, the main control unit uses a polling sampling method for multiple sets of electromagnetic induction units, and only one set of electromagnetic induction units is in working state at the same time, so as to avoid electromagnetic crosstalk caused when multiple electromagnetic induction units work at the same time.

10. The method according to 6, characterized in that, In S6, the main control unit identifies the fault type based on the drive current. When a motor stall, open circuit, or overload fault is identified, the corresponding fault type information is reported through the communication unit to achieve accurate location of the door lock fault. The communication unit also uploads door lock status information, fault information and operating parameters to the main controller of the home appliance in real time, and receives linkage strategy update instructions and scene trigger instructions issued by the main controller of the home appliance.

Images