Door lock state detection method, device and equipment and storage medium

Abstract

The invention discloses a washing machine door lock state detection method, device and equipment and a storage medium, the washing machine door lock state detection method, device and equipment are applied to clothes processing equipment, the clothes processing equipment is provided with a signal processing circuit for converting a door lock contact signal into a square signal, and the method comprises the steps that a target square signal processed by the signal processing circuit is acquired; and based on the waveform parameter of the target square wave signal, determining that the door lock state of the clothes processing equipment is a locked state or an unlocked state in a humid environment. A door lock contact signal is processed into a door lock square wave signal, whether the door lock square wave signal exists or not is detected, and whether the current door lock state is effective unlocking or not is judged; and then detecting the time difference between the high level and the low level of the square wave signal of the door lock or the effective amplitude in unit time, and judging whether the current door lock state is an effective locking state or an unlocking state in a humid state.

Description

Technical Field

[0001] The present invention relates to the technical field of drum washing machines, and particularly to a method, device, equipment and storage medium for detecting the state of a washing machine door lock. Background Art

[0002] In a drum washing machine, many control logics are related to the state of the door lock. For example, in a common drum washing machine, when the door lock is in the unlocked state, the washing machine can be controlled to stop dehydration; when the door lock is in the locked state, after pressing the pause button, the door lock state can be allowed to change to the unlocked state after a preset time; therefore, the detection of the door lock state of the washing machine is particularly important.

[0003] Currently, the judgment of the door lock state of some drum washing machines mainly depends on the detection of the door lock signal to judge whether the door lock is in the unlocked or locked state; however, when the door lock is in the unlocked state, due to the moisture of the door lock contacts, a certain impedance is generated between the door lock contacts, and there will be a weak door lock signal, resulting in the current detection method may not be able to effectively identify the door lock state or misjudge the door lock state. Summary of the Invention

[0004] The technical problem to be solved by the present invention is how to accurately judge the state of the washing machine door lock.

[0005] In the first aspect of the present invention, to solve the above technical problem, a method for detecting the door lock state is provided. The laundry treatment device has a signal processing circuit for converting the door lock contact signal into a square wave signal. The method includes the following steps: Obtain the target square wave signal processed by the signal processing circuit; Based on the waveform parameters of the target square wave signal, determine the door lock state of the laundry treatment device as: the locked state or the unlocked state in a humid environment.

[0006] Further, the waveform parameters of the target square wave signal include at least one of the duration difference between the high and low levels of the target square wave signal and the effective amplitude within a unit time.

[0007] Optionally, the operation of determining the door lock state of the laundry treatment device as: the locked state or the unlocked state in a humid environment based on the waveform parameters of the target square wave signal includes: When the absolute value of the duration difference between the high and low levels of the target square wave signal exceeds the set time, determine that the door lock state of the laundry treatment device is the unlocked state in a humid environment; otherwise, determine that the door lock state of the laundry treatment device is the locked state.

[0008] Optionally, the operation of determining the door lock state of the laundry treatment device as: the locked state or the unlocked state in a humid environment based on the waveform parameters of the target square wave signal includes: When the effective amplitude of the target square wave signal within a unit time is lower than a preset amplitude, determining the door lock state of the laundry treatment device as the unlocked state in a humid environment; otherwise, determining the door lock state of the laundry treatment device as the locked state.

[0009] Furthermore, the method further includes: When the target square wave signal processed by the signal processing circuit is not received, determining the door lock state of the laundry treatment device as the normal unlocked state.

[0010] In a second aspect of the present invention, there is provided a door lock state detection device applied to a laundry treatment device. The laundry treatment device has a signal processing circuit that converts a door lock contact signal into a square wave signal. The device includes: An acquisition module for acquiring the target square wave signal processed by the signal processing circuit; A determination module for determining the door lock state of the laundry treatment device as: the locked state or the unlocked state in a humid environment based on the waveform parameters of the target square wave signal.

[0011] In a third aspect of the present invention, there is provided a laundry treatment device, including: The door lock state detection device as described above, and A signal processing circuit that converts a door lock contact signal into a square wave signal.

[0012] Furthermore, the signal processing circuit includes a capacitor C42, a capacitor C43, a resistor R79, a resistor R80, and a bidirectional trigger diode D19, where: The positive electrode of the bidirectional trigger diode D19 is connected to the common point of the capacitor C42 and the resistor R79 connected in parallel, and the negative electrode of the bidirectional trigger diode D19 is grounded through the resistor R80; One end of the resistor R79 is connected to a 5V power supply; The capacitor C43 is connected in parallel with the bidirectional trigger diode D19.

[0013] In a fourth aspect of the present invention, there is provided a computer-readable storage medium including instructions. When the instructions run on a computer, the computer executes the method as described above.

[0014] In a fifth aspect of the present invention, there is provided a computer program product containing instructions. When the instructions run on a computer, the computer executes the method as described above.

[0015] Compared with the prior art, the embodiments of the present invention have the following beneficial effects: In the present invention, the door lock contact signal is processed into a door lock square wave signal, the presence or absence of the door lock square wave signal is detected, and it is determined whether the current door lock state is effective unlocking; then, the time difference between the high and low levels of the door lock square wave signal or the effective amplitude within a unit time is detected to determine whether the current door lock state is effective locking or unlocking in a humid state. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0017] Figure 1 is a flow block diagram disclosed in the embodiments of the present invention; Figure 2 is a circuit schematic diagram of the signal processing module disclosed in the embodiments of the present invention; Figure 3 is a waveform diagram when the door lock state is effectively locked in the embodiments of the present invention; Figure 4 is a waveform diagram when the door lock state is unlocking in a humid state in the embodiments of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] In order to enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0019] Please refer to Figure 1 , the present invention aims to provide a method for detecting the door lock state, which is applied to a laundry treatment device. The laundry treatment device has a signal processing circuit for converting a door lock contact signal into a square wave signal. The method includes the following steps: S1. Obtain the target square wave signal processed by the signal processing circuit.

[0020] In an embodiment of the present invention, a low-pass filter is configured for the door lock contact signal to filter out high-frequency noise in the door lock contact signal and retain low-frequency signals, obtaining a door lock square wave signal as shown in Figure 3 . Among them, the amplitude of the door lock square wave signal is 5V, and the frequency is the mains frequency.

[0021] S2. Determine the door lock state of the laundry treatment device as: locked state or unlocked state in a humid environment based on the waveform parameters of the target square wave signal.

[0022] Among them, the waveform parameters of the target square wave signal may include at least one of the duration difference between the high and low levels of the target square wave signal and the effective amplitude per unit time.

[0023] That is to say, in the actual use process, the door lock state can be determined by only one parameter of the duration difference between the high and low levels of the target square wave signal and the effective amplitude per unit time. For example, when the duration difference between the high and low levels of the target square wave signal reaches a given condition, it can be determined that the door lock state is the unlocked state in a humid environment; it is also possible to comprehensively judge the two parameters of the duration difference between the high and low levels of the target square wave signal and the effective amplitude per unit time. When one of the two parameters reaches the given condition corresponding to the parameter, it is determined that the door lock state is the unlocked state in a humid environment.

[0024] Please refer to Figure 4 For step S2, the present invention is further illustrated by two embodiments.

[0025] Embodiment 1 Embodiment 1 is to judge whether it is effectively locked or unlocked in a humid state by comparing the duration difference between the high and low levels of the door lock square wave signal with the set time when a door lock square wave signal is detected.

[0026] Specifically: When no door lock square wave signal is detected, it is determined that the current door lock state is effectively unlocked; When a door lock square wave signal is detected and the absolute value of the duration difference between the high and low levels of the target square wave signal exceeds the set time, it is determined that the current door lock state of the laundry treatment device is the unlocked state in a humid environment; otherwise, it is determined that the current door lock state of the laundry treatment device is effectively locked.

[0027] In this embodiment, the set time is (4.465 * bus voltage + 2350) / 16000 milliseconds.

[0028] Embodiment 2 Embodiment 2 is to judge whether it is effectively locked or unlocked in a humid state by comparing the effective amplitude per unit time of the door lock square wave signal with the preset amplitude when a door lock square wave signal is detected.

[0029] Specifically: When no door lock square wave signal is detected, it is determined that the current door lock state is effectively unlocked; When it is detected that there is a door lock square wave signal and the effective amplitude of the target square wave signal within a unit time is lower than the preset amplitude, it is determined that the current door lock state of the laundry treatment device is the unlocked state under the wet state; otherwise, it is determined that the current door lock state of the laundry treatment device is effectively locked.

[0030] In this embodiment, the preset amplitude is 1.5V.

[0031] To implement the above embodiment, the present invention further proposes a door lock state detection device applied to a laundry treatment device. The laundry treatment device has a signal processing circuit for converting a door lock contact signal into a square wave signal. The device mainly includes an acquisition module and a determination module.

[0032] Among them, the signal processing circuit is used to process the door lock contact signal into a door lock square wave signal with an amplitude of 5V and a frequency of the mains frequency. The acquisition module is used to acquire the target square wave signal processed by the signal processing circuit. The determination module is used to determine the door lock state of the laundry treatment device based on the waveform parameters of the target square wave signal as: the locked state or the unlocked state in a wet environment.

[0033] In a further solution of this embodiment, the determination module includes a comparison unit and a judgment unit. Among them, the comparison unit is used to compare the duration difference between the high and low levels of the door lock square wave signal with the set time, or compare the effective amplitude of the door lock square wave signal within a unit time with the preset amplitude. The judgment unit judges the door lock state according to the result of the comparison unit. Among them, the door lock state includes effectively locked, effectively unlocked, and the unlocked state under the wet state.

[0034] This solution also protects a laundry treatment device, which includes the above door lock state detection device and a signal processing circuit for converting a door lock contact signal into a square wave signal.

[0035] In an embodiment of this solution, the signal processing circuit includes a capacitor C42, a capacitor C43, a resistor R79, a resistor R80, and a bidirectional trigger diode D19, where: the positive electrode of the bidirectional trigger diode D19 is connected to the common point of the capacitor C42 and the resistor R79 connected in parallel, the negative electrode of the bidirectional trigger diode D19 is grounded through the resistor R80; one end of the resistor R79 is connected to the 5V power supply; the capacitor C43 is connected in parallel with the bidirectional trigger diode D19.

[0036] First, an explanation is made for the acquisition module not detecting the door lock square wave signal within a predetermined time.

[0037] Within a predetermined time, when the acquisition module detects no door lock square wave signal, the determination module determines that the current door lock state is effectively unlocked.

[0038] Next, an explanation is made for the acquisition module detecting the door lock square wave signal within a predetermined time.

[0039] According to the different objects obtained by the acquisition module, the present invention is further described through two implementation schemes.

[0040] When the acquisition module obtains the duration difference between the high and low levels of the door lock square wave signal, the comparison unit compares the duration difference between the high and low levels of the door lock square wave signal with the set time. If the time difference between the high and low levels of the door lock square wave signal is greater than the set time, the judgment unit judges that the current door lock state is unlocking under a humid state; otherwise, the judgment unit judges that the current door lock state is effectively locked.

[0041] When the acquisition module obtains the effective amplitude within a unit time of the door lock square wave signal, the comparison unit compares the effective amplitude within a unit time of the door lock square wave signal with the preset amplitude. If the effective amplitude within a unit time of the door lock square wave signal is less than the preset amplitude, the judgment unit judges that the current door lock state is unlocking under a humid state; otherwise, the judgment unit judges that the current door lock state is effectively locked.

[0042] The present invention also protects a computer-readable storage medium, including instructions, when the instructions run on a computer, the computer executes the above method.

[0043] The present invention also protects a computer program product containing instructions, when the instructions run on a computer, the computer executes the described method.

[0044] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for detecting the state of a door lock, which is applied to a laundry treatment device. The laundry treatment device has a signal processing circuit for converting a door lock contact signal into a square wave signal, and is characterized in that The method includes: Obtaining a target square wave signal processed by the signal processing circuit; Based on the waveform parameters of the target square wave signal, determining the door lock state of the clothing processing device as: a locked state or an unlocked state in a humid environment.

2. The door lock state detection method according to claim 1, wherein The waveform parameters of the target square wave signal include at least one of the duration difference between the high and low levels of the target square wave signal and the effective amplitude within a unit time.

3. The door lock state detection method according to claim 2, wherein The operation of determining the door lock state of the clothing processing device as: a locked state or an unlocked state in a humid environment based on the waveform parameters of the target square wave signal includes: When the absolute value of the duration difference between the high and low levels of the target square wave signal exceeds a set time, determining the door lock state of the clothing processing device as an unlocked state in a humid environment; otherwise, determining the door lock state of the clothing processing device as a locked state.

4. The door lock state detection method according to claim 2, wherein The operation of determining the door lock state of the clothing processing device as: a locked state or an unlocked state in a humid environment based on the waveform parameters of the target square wave signal includes: When the effective amplitude of the target square wave signal within a unit time is lower than a preset amplitude, determining the door lock state of the clothing processing device as an unlocked state in a humid environment; otherwise, determining the door lock state of the clothing processing device as a locked state.

5. The door lock state detection method according to claim 1, wherein, The method further includes: When the target square wave signal processed by the signal processing circuit is not received, determining the door lock state of the clothing processing device as a normal unlocked state.

6. A door lock state detection device is applied to a laundry treatment device. The laundry treatment device has a signal processing circuit for converting a door lock contact signal into a square wave signal, characterized in that The device includes: An acquisition module for acquiring a target square wave signal processed by the signal processing circuit; A determination module for determining the door lock state of the clothing processing device as: a locked state or an unlocked state in a humid environment based on the waveform parameters of the target square wave signal.

7. A laundry treatment device, characterized in that, Including: The door lock state detection device according to claim 6, and A signal processing circuit that converts a door lock contact signal into a square wave signal.

8. The laundry treating apparatus according to claim 7, wherein, The signal processing circuit includes a capacitor C42, a capacitor C43, a resistor R79, a resistor R80, and a bidirectional trigger diode D19, wherein: The positive electrode of the bidirectional trigger diode D19 is connected to the common point of the capacitor C42 and the resistor R79 connected in parallel, and the negative electrode of the bidirectional trigger diode D19 is grounded through the resistor R80; One end of the resistor R79 is connected to a 5V power supply; The capacitor C43 is connected in parallel with the bidirectional trigger diode D19.

9. A computer-readable storage medium, wherein It includes instructions that, when run on a computer, cause the computer to execute the method according to any one of claims 1 to 5.

10. A computer program product containing instructions, wherein When the instructions are run on a computer, the computer executes the method according to any one of claims 1 to 5.

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