A low-power supply control method and system for a smart home appliance

Abstract

The application discloses a low-power supply control method and system for intelligent household appliances, which comprises the following steps: when the main control module is in sleep mode, detecting the rising slope of the output voltage of the wake-up source sensor, generating a first event pulse when the rising slope exceeds a threshold value, and converting the rising slope value into a first frequency pulse sequence; detecting the falling slope of the terminal voltage of the device battery, generating a second event pulse when the falling slope exceeds a threshold value, and converting the absolute value of the falling slope into a second frequency pulse sequence; matching the first event pulse with the first-appeared second event pulse to form an event pair; determining a level overlap period according to the slope intensity ratio, extracting the frequency difference value in the overlap period by means of exclusive OR operation, converting the frequency difference value into charge accumulation to an integral capacitor, and recursively updating the integral voltage; and outputting a wake-up signal when the integral voltage of a plurality of continuous event pairs exceeds a reference voltage. The application realizes the wake-up decision in the complete analog domain, does not need an analog-to-digital converter and a processor to participate, and significantly reduces the standby power consumption.

Description

Technical Field

[0001] This invention belongs to the field of intelligent home appliance control technology, and particularly relates to a low-power power supply control method and system for intelligent home appliances. Background Technology

[0002] Smart home appliances are typically battery-powered. To extend battery life, the main control module enters a sleep state when not in use. When an external trigger event occurs (such as human movement, door sensor opening / closing, or remote control signal arrival), the main control module needs to be woken up promptly to perform the corresponding task.

[0003] Existing wake-up mechanisms mostly employ timed wake-up or fixed voltage threshold comparison methods. Timed wake-up methods cannot respond immediately when an event occurs, causing a response delay; fixed voltage threshold comparison methods are prone to false triggering under electromagnetic interference, power supply ripple, or sensor noise, leading to repeated system wake-ups and increasing average power consumption.

[0004] Some solutions determine valid wake-up events by detecting the slope of changes in sensor signals and battery voltage. However, existing slope detection solutions only apply a threshold to the slope of a single path, failing to distinguish between transient battery voltage changes caused by genuine triggering events and voltage changes caused by load fluctuations or other interference, resulting in a high false wake-up rate. Another solution uses digital sampling followed by correlation analysis, but digital processing requires continuous operation of the analog-to-digital converter and microprocessor, leading to high power consumption during sleep mode and making it unsuitable for low-power applications.

[0005] Therefore, a power supply control method is needed that can accurately identify valid wake-up events and reliably wake up the main control module under low power conditions. Summary of the Invention

[0006] This application provides a low-power power supply control method and system for smart home appliances to resolve the contradiction between low power consumption and high reliability in existing wake-up mechanisms.

[0007] In a first aspect, the present invention provides a low-power power supply control method for a smart home appliance, the smart home appliance including a wake-up source sensor, a device battery, and a system controller, the system controller including a main control module and a low-power power supply control system; the low-power power supply control method includes:

[0008] When the main control module is in sleep mode, the low-power power supply control system performs the following steps:

[0009] The rising slope of the output voltage of the wake-up source sensor is detected. When the rising slope exceeds the preset rising slope threshold, a first event pulse is generated, and the real-time rising slope value is converted into a first frequency pulse sequence during the duration of the first event pulse.

[0010] The device detects the rate of decline of the battery terminal voltage. When the absolute value of the rate of decline exceeds a preset rate of decline threshold, a second event pulse is generated. During the duration of the second event pulse, the real-time absolute value of the rate of decline is converted into a second frequency pulse sequence.

[0011] Each first event pulse and the first frequency pulse sequence corresponding to the first event pulse are paired with the second event pulse that appears first after the first event pulse occurs and the second frequency pulse sequence corresponding to the second event pulse to form an event pair.

[0012] For each event pair, according to a preset pulse analysis strategy, the level overlap period between the first event pulse and the second event pulse is determined. During the level overlap period, the pulses in the first frequency pulse sequence and the pulses in the second frequency pulse sequence are converted into charges, and the converted charges are accumulated to the same integrating capacitor to obtain the integrated voltage. Specifically, the pulse analysis strategy is as follows:

[0013] Obtain the first differential voltage amplitude corresponding to the real-time rising slope value when the first event pulse is generated, and denot it as the first slope intensity;

[0014] The amplitude of the second differential voltage after inversion is obtained, which corresponds to the absolute value of the real-time falling slope when the second event pulse is generated, and is denoted as the second slope intensity.

[0015] Calculate the ratio of the first slope intensity to the second slope intensity to obtain the slope intensity ratio, and compare the slope intensity ratio with a preset upper limit threshold and a lower limit threshold for the intensity ratio. Determine the level overlap period based on the comparison result.

[0016] The integrated voltage is compared with a preset reference voltage. When the integrated voltage corresponding to each of the N consecutive event pairs is greater than the preset reference voltage, a wake-up signal is output to the main control module, causing the main control module to switch from the sleep state to the working state, where N is an integer greater than or equal to 2.

[0017] In a second aspect, the present invention provides a low-power power supply control system for smart home appliances, the smart home appliances including a wake-up source sensor, a device battery, and a system controller, the system controller including a main control module and a low-power power supply control system; the low-power power supply control system includes:

[0018] The wake-up source slope detection module is used to detect the rising slope of the output voltage of the wake-up source sensor. When the rising slope exceeds the preset rising slope threshold, a first event pulse is generated, and the real-time rising slope value is converted into a first frequency pulse sequence during the duration of the first event pulse.

[0019] The battery slope detection module is used to detect the rate of decline of the battery terminal voltage of the device. When the absolute value of the rate of decline exceeds the preset rate of decline threshold, a second event pulse is generated, and within the duration of the second event pulse, the real-time absolute value of the rate of decline is converted into a second frequency pulse sequence.

[0020] The event pairing module is used to pair each first event pulse and the first frequency pulse sequence corresponding to the first event pulse with the second event pulse that appears first after the first event pulse occurs and the second frequency pulse sequence corresponding to the second event pulse to form an event pair.

[0021] The pulse analysis module is used to determine the level overlap period between the first event pulse and the second event pulse for each event pair according to a preset pulse analysis strategy. During the level overlap period, the pulses in the first frequency pulse sequence and the pulses in the second frequency pulse sequence are converted into charges, and the converted charges are accumulated to the same integrating capacitor to obtain the integrated voltage. The pulse analysis strategy is specifically as follows:

[0022] Obtain the first differential voltage amplitude corresponding to the real-time rising slope value when the first event pulse is generated, and denot it as the first slope intensity;

[0023] The amplitude of the second differential voltage after inversion is obtained, which corresponds to the absolute value of the real-time falling slope when the second event pulse is generated, and is denoted as the second slope intensity.

[0024] Calculate the ratio of the first slope intensity to the second slope intensity to obtain the slope intensity ratio, and compare the slope intensity ratio with a preset upper limit threshold and a lower limit threshold for the intensity ratio. Determine the level overlap period based on the comparison result.

[0025] The decision module is used to compare the integrated voltage with a preset reference voltage. When the integrated voltage corresponding to each of the N consecutive event pairs is greater than the preset reference voltage, a wake-up signal is output to the main control module to switch the main control module from the sleep state to the working state, where N is an integer greater than or equal to 2.

[0026] Thirdly, an electronic device is provided, comprising: at least one processor, and a memory communicatively connected to the at least one processor, wherein the memory stores instructions executable by the at least one processor, the instructions being executed by the at least one processor to enable the at least one processor to perform the steps of a low-power supply control method for a smart home appliance according to any embodiment of the present invention.

[0027] Fourthly, the present invention also provides a computer-readable storage medium having a computer program stored thereon, wherein when the program instructions are executed by a processor, the processor performs the steps of a low-power power supply control method for smart home appliances according to any embodiment of the present invention.

[0028] This application presents a low-power power supply control method and system for smart home appliances. It converts the rising slope of the wake-up source signal and the falling slope of the battery voltage into a frequency pulse sequence in real time through slope-frequency conversion. The entire detection, pairing, analysis, and decision process is completed in the analog domain, without the need for an analog-to-digital converter or processor. During sleep mode, it consumes only sub-microampere static current, significantly reducing standby power consumption. The hysteresis characteristic of the Schmitt trigger effectively suppresses input noise and ripple, avoiding false triggering near the threshold. The logarithmic amplifier compresses the differential voltage, ensuring that the voltage-controlled oscillator operates in the linear region under a large dynamic range, avoiding frequency saturation and slope information loss. A pulse analysis strategy based on slope intensity ratio is introduced, utilizing… The deterministic proportional relationship between the wake-up source rise slope and the battery fall slope in real wake-up events is addressed by using confidence interval decision and dynamic delay compensation to resolve the time asynchrony between the two signals, improving the accuracy and robustness of overlapping period extraction. Frequency difference is extracted using an XOR gate, and charge accumulation is controlled by an inverse current, achieving threshold-free continuous quantization of matching quality in the analog domain, accurately reflecting subtle differences in frequency synchronization. A recursive integral voltage update mechanism with a forgetting factor combines the current event's contribution to the integral with historical attenuation, ensuring rapid accumulation response for continuous matching events while avoiding the continued impact of historical anomalies. This allows for rapid recovery of effective confidence after interference, guaranteeing the accuracy and reliability of wake-up. Attached Figure Description

[0029] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 A flowchart illustrating a low-power power supply control method for smart home appliances, provided in an embodiment of the present invention;

[0031] Figure 2 This is a structural block diagram of a low-power power supply control system for smart home appliances provided in an embodiment of the present invention;

[0032] Figure 3 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present invention. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Please see Figure 1 The diagram illustrates a flowchart of a low-power power supply control method for smart home appliances according to this application.

[0035] like Figure 1 As shown, the low-power supply control method for smart home appliances specifically includes the following steps:

[0036] Step S101: Detect the rising slope of the output voltage of the wake-up source sensor. When the rising slope exceeds the preset rising slope threshold, generate a first event pulse. During the duration of the first event pulse, convert the real-time rising slope value into a first frequency pulse sequence.

[0037] In this step, the output voltage of the wake-up source sensor is differentiated using the first RC differentiating circuit to obtain the first differential voltage;

[0038] The first differential voltage is input to the first Schmitt trigger, which is a positive feedback comparator circuit with hysteresis characteristics. The positive threshold voltage of the first Schmitt trigger corresponds to a preset rising slope threshold, and the output of the first Schmitt trigger is used as the first event pulse.

[0039] The first differential voltage is input into the first logarithmic amplifier for compression to obtain the first compressed voltage;

[0040] The first compression voltage is input to the first voltage-controlled oscillator, and the output of the first voltage-controlled oscillator is used as the first frequency pulse sequence. The instantaneous frequency of the first frequency pulse sequence is proportional to the first compression voltage.

[0041] In one specific embodiment, the rising slope detection and frequency conversion of the output voltage of the wake-up source sensor are realized by the wake-up source slope detection module, which includes a first RC differentiating circuit, a first Schmitt trigger, a first logarithmic amplifier, and a first voltage-controlled oscillator.

[0042] The first RC differentiating circuit is composed of a first capacitor C1 and a first resistor R1 connected in series. One end of the first capacitor C1 is connected to the output of the wake-up source sensor as the input terminal. One end of the first resistor R1 is connected to the other end of the first capacitor C1, and the other end of the first resistor R1 is grounded. The connection node between the first capacitor C1 and the first resistor R1 is the output of the first RC differentiating circuit.

[0043] When the output voltage of the wake-up source sensor increases, the voltage across the first capacitor C1 cannot change abruptly. At the instant of change, a current proportional to the rate of voltage change is generated across the first resistor R1, thus obtaining the first differential voltage at the output of the first RC differentiating circuit. , The following relationship must be satisfied: ,in This represents the rising slope of the output voltage of the wake-up source sensor. The time constants of R1 and C1 are set according to the voltage change characteristics of the wake-up source sensor, so that under typical sudden light conditions... The amplitude is within the effective operating range of the subsequent circuit.

[0044] The output of the first RC differentiator circuit is connected to both the input of the first Schmitt trigger and the input of the first logarithmic amplifier.

[0045] The first Schmitt trigger is a positive feedback comparator circuit with hysteresis characteristics, including a first operational amplifier, a first feedback resistor, a second feedback resistor, and a first resistor. The non-inverting input of the first operational amplifier serves as the input of the first Schmitt trigger. The inverting input of the first operational amplifier is grounded through the second feedback resistor. The first feedback resistor is connected between the output and the non-inverting input of the first operational amplifier, forming a positive feedback loop. The first Schmitt trigger has a positive threshold voltage. and negative threshold voltage The positive threshold voltage V th+ Corresponding to the preset rising slope threshold ,satisfy.

[0046] When the first differential voltage rises from zero, the output of the first Schmitt trigger remains low. When the amplitude exceeds the positive threshold voltage... At this time, the output of the first operational amplifier quickly flips to a high level, generating the rising edge of the first event pulse. Subsequently, due to positive feedback, the threshold of the first Schmitt trigger switches to a negative threshold voltage. .when From peak and down to When the first operational amplifier output flips to a low level, a first event pulse is generated. The falling edge. First event pulse. The high-level width is Exceed The duration of the rise event characterizes the duration of the rise event. Due to the hysteresis characteristic, the first Schmitt trigger can effectively suppress noise and ripple superimposed at the input, avoiding multiple flips near the threshold.

[0047] The first logarithmic amplifier includes a second operational amplifier, a first NPN transistor, and a first input resistor. The inverting input of the second operational amplifier is connected to the input of the first logarithmic amplifier via the first input resistor, and the non-inverting input of the second operational amplifier is grounded. The base of the first NPN transistor is connected to the output of the second operational amplifier, the emitter of the first NPN transistor is connected to the inverting input of the second operational amplifier, and the collector of the first NPN transistor is connected to the power supply voltage and outputs a first compressed voltage through a first load resistor. The first logarithmic amplifier utilizes the exponential characteristic of the transistor's PN junction to output a first differential voltage. Perform logarithmic compression and output the first compression voltage. , ,in, Thermoelectric voltage, This is the reverse saturation current of the transistor. Let be the resistance value of the first input resistor. Logarithmic compression makes ... It maintains a limited voltage range across a dynamic range spanning multiple orders of magnitude, thus preventing the subsequent voltage-controlled oscillator from entering a frequency saturation state.

[0048] The first voltage-controlled oscillator includes a third operational amplifier, a second NPN transistor, and a first timing capacitor. and the first discharge resistor The non-inverting input of the third operational amplifier serves as the control terminal of the first voltage-controlled oscillator, receiving the first compression voltage. The base of the second NPN transistor is connected to the output of the third operational amplifier, and its collector is connected to the first timing capacitor. Grounded, the emitter is grounded through a current-setting resistor. When the first timing capacitor... The voltage on the device is charged to the first compression voltage. At that time, the output of the third operational amplifier flips to a high level, the second NPN transistor turns on, and the first timing capacitor... Through the second NPN transistor and the first discharge resistor Rapid discharge generates a falling edge of a pulse. After discharge, the circuit recharges, forming the next pulse cycle. The first frequency pulse sequence is output by the first voltage-controlled oscillator. instantaneous frequency satisfy Where k is the value generated by the first timing capacitor. The conversion factor is determined by the current-setting resistor. Therefore, It is proportional to the first compression voltage, that is, proportional to the first differential voltage. It is proportional to the logarithm.

[0049] In summary, the first event pulse The generation of this mechanism ensures that subsequent circuitry only performs frequency conversion and processing when a valid slope event occurs. During periods without events, the first voltage-controlled oscillator ceases operation and does not consume dynamic current; the first frequency pulse sequence... The instantaneous frequency reflects the strength of the rising slope in real time, providing complete time-frequency information for subsequent event matching decisions.

[0050] In this step, the analog domain real-time detection and frequency conversion of the rise slope of the wake-up source sensor output voltage are realized through the coordinated operation of the first RC differentiating circuit, the first Schmitt trigger, the first logarithmic amplifier, and the first voltage-controlled oscillator. Compared with the existing technology that uses an analog-to-digital converter to sample and then calculate the digital slope, the circuit in this step operates entirely in the analog domain, requiring no clock drive or digital processing. During sleep, it consumes only less than microamperes of static current, significantly reducing the system's standby power consumption.

[0051] The hysteresis characteristic of the first Schmitt trigger effectively suppresses the noise and ripple interference superimposed at the input, avoiding multiple false triggers caused by noise near the threshold, and ensuring the cleanliness and stability of the event pulse; the first logarithmic amplifier performs logarithmic compression on the differential voltage, so that the input voltage of the voltage-controlled oscillator always remains in the linear operating range under the large dynamic range change of light intensity from weak to strong light, avoiding the loss of slope information caused by frequency saturation, and ensuring the accurate characterization capability of different light intensity abrupt changes.

[0052] Step S102: Detect the rate of decline of the battery terminal voltage of the device. When the absolute value of the rate of decline exceeds the preset rate of decline threshold, generate a second event pulse. During the duration of the second event pulse, convert the real-time absolute value of the rate of decline into a second frequency pulse sequence.

[0053] In this step, the voltage at the device's battery terminal is differentiated using the second RC differentiating circuit to obtain the second differential voltage;

[0054] The second differential voltage is input to the second Schmitt trigger, which is a positive feedback comparator circuit with hysteresis characteristics. The absolute value of the negative threshold voltage of the second Schmitt trigger corresponds to a preset falling slope threshold. The output of the second Schmitt trigger serves as the second event pulse.

[0055] Invert the second differential voltage to obtain an absolute voltage that is proportional to the absolute value of the falling slope;

[0056] The absolute voltage is input into a second logarithmic amplifier for compression to obtain a second compressed voltage;

[0057] The second compression voltage is input to the second voltage-controlled oscillator, and the output of the second voltage-controlled oscillator is used as the second frequency pulse sequence. The instantaneous frequency of the second frequency pulse sequence is proportional to the second compression voltage.

[0058] In one specific embodiment, the detection of the rate of decline of the device battery terminal voltage and frequency conversion are achieved by a battery slope detection module, which includes a second RC differentiating circuit, a second Schmitt trigger, an inverter, a second logarithmic amplifier, and a second voltage-controlled oscillator.

[0059] The second RC differentiating circuit consists of a second capacitor C2 and a second resistor R2 connected in series. One end of the second capacitor C2 is connected to the positive terminal of the device battery as the input terminal. One end of the second resistor R2 is connected to the other end of the second capacitor C2, and the other end of the second resistor R2 is grounded. The connection point between the second capacitor C2 and the second resistor R2 serves as the output terminal of the second RC differentiating circuit.

[0060] When the battery voltage of the device decreases (e.g., when the main control module is woken up and starts executing a task, or when the load current suddenly increases), the voltage across the second capacitor C2 cannot change abruptly. At the instant of the change, a current proportional to the rate of voltage change is generated across the second resistor R2, thus obtaining the second differential voltage at the output of the second RC differentiating circuit. Because the voltage at the device's battery terminals decreases, the rate of voltage change... It is a negative value, therefore It is also a negative value, satisfying the condition. . The absolute value of is proportional to the absolute value of the slope of the voltage drop at the device's battery terminals. The time constants of R2 and C2 are set according to the voltage response characteristics of the device's battery when the charging current suddenly increases, so that under the condition of transient voltage drop caused by typical wake-up execution tasks, The absolute value is within the effective operating range of the subsequent circuit.

[0061] The output of the second RC differentiator circuit is connected to the input of the second Schmitt trigger, and also to the input of the inverter.

[0062] The second Schmitt trigger is a positive feedback comparator circuit with hysteresis characteristics, including a fourth operational amplifier, a third feedback resistor, a fourth feedback resistor, and a second resistor. The inverting input of the fourth operational amplifier serves as the input of the second Schmitt trigger, and the non-inverting input of the fourth operational amplifier is grounded through the fourth feedback resistor. The third feedback resistor is connected between the output of the fourth operational amplifier and the non-inverting input, forming a positive feedback loop. The second Schmitt trigger has a negative threshold voltage. and positive threshold voltage The negative threshold voltage The absolute value corresponds to the preset descent slope threshold. ,satisfy .

[0063] When the second differential voltage As the voltage decreases from zero towards the negative direction, the output of the second Schmitt trigger remains low. The absolute value exceeds the negative threshold voltage The absolute value, that is The negative amplitude is lower than At that moment, the output of the fourth operational amplifier quickly flips to a high level, generating the second event pulse. The rising edge of the second Schmitt trigger. Afterwards, due to positive feedback, the threshold voltage of the second Schmitt trigger switches to the positive threshold voltage. .when Rebound from the negative trough and exceed At that time, the output of the fourth operational amplifier flips to a low level, generating the second event pulse. The falling edge. Second event pulse. The high-level width is The absolute value exceeds The duration of the drop event characterizes the duration of the drop event. Due to the hysteresis characteristic, the second Schmitt trigger can effectively suppress the ripple superimposed on the device battery terminal voltage and the small voltage jitter caused by load fluctuations, avoiding multiple flips near the threshold.

[0064] The inverter includes a fifth operational amplifier, a fifth feedback resistor, and a fifth input resistor. The inverting input of the fifth operational amplifier is connected to the input of the inverter through the fifth input resistor. The non-inverting input of the fifth operational amplifier is grounded. The fifth feedback resistor is connected between the output of the fifth operational amplifier and the inverting input. The gain of the inverter is set to -1, meaning that when the input voltage is... At that time, the output voltage is .because The absolute value of the inverter output voltage is negative. It is a positive value. ,Right now It is proportional to the absolute value of the falling slope. By inverting the signal, the negative falling slope signal is converted into a positive absolute value voltage signal, so that the subsequent second logarithmic amplifier and second voltage-controlled oscillator can process it with a unified signal polarity.

[0065] The second logarithmic amplifier includes a sixth operational amplifier, a third NPN transistor, and a second input resistor. The inverting input of the sixth operational amplifier is connected to the input of the second logarithmic amplifier via the second input resistor, and the non-inverting input of the sixth operational amplifier is grounded. The base of the third NPN transistor is connected to the output of the sixth operational amplifier, the emitter of the third NPN transistor is connected to the inverting input of the sixth operational amplifier, and the collector of the third NPN transistor is connected to the power supply voltage and outputs a second compressed voltage through the second load resistor. The second logarithmic amplifier utilizes the exponential characteristic of the transistor's PN junction to compress absolute value voltages. Perform logarithmic compression and output a second compression voltage. , ,in Thermoelectric voltage, This is the reverse saturation current of the transistor. This is the resistance value of the second input resistor. Logarithmic compression allows for voltage drop slopes that span multiple orders of magnitude when the device's battery voltage decreases. Always keep it within a limited range to avoid the subsequent voltage-controlled oscillator from entering a state of frequency saturation or nonlinear distortion due to excessive input voltage.

[0066] The second voltage-controlled oscillator includes a seventh operational amplifier, a fourth NPN transistor, and a second timing capacitor. Second discharge resistor The non-inverting input of the seventh operational amplifier serves as the control terminal of the second voltage-controlled oscillator, receiving the second compression voltage. The base of the fourth NPN transistor is connected to the output of the seventh operational amplifier, and its collector is connected to the second timing capacitor. Grounded, the emitter is grounded through a current-setting resistor. When the second timing capacitor... The voltage on the device is charged to the second compression voltage. At that time, the output of the seventh operational amplifier flips to a high level, the fourth NPN transistor turns on, and the second timing capacitor... Through the fourth NPN transistor and the second discharge resistor Rapid discharge generates a falling edge of a pulse. After discharge, the circuit recharges, forming the next pulse cycle. The second frequency pulse sequence is output from the second voltage-controlled oscillator. instantaneous frequency in For the second timing capacitor The conversion coefficient is determined by the current-setting resistor. Therefore, f2 is related to the second compression voltage. Proportional to, that is, proportional to the absolute value of the voltage It is directly proportional to the logarithm, indirectly reflecting the logarithm of the absolute value of the descending slope.

[0067] In summary, the second event pulse The generation of this mechanism ensures that subsequent circuitry only initiates frequency conversion and processing when a valid battery voltage drop event occurs. During periods without events, the second voltage-controlled oscillator remains inactive, consuming no dynamic current; the second frequency pulse sequence... The instantaneous frequency reflects the strength of the absolute value of the descent slope in real time, providing complete time-frequency information for subsequent event pair matching and frequency correlation determination.

[0068] This step, through the coordinated operation of the second RC differentiating circuit, the second Schmitt trigger, the inverter, the second logarithmic amplifier, and the second voltage-controlled oscillator, achieves real-time analog domain detection and frequency conversion of the voltage drop slope at the device's battery terminal. Compared to the existing technology that uses an analog-to-digital converter to sample and then calculate the digital slope, the circuit in this step operates entirely in the analog domain, requiring no clock drive or digital processing. During sleep mode, it consumes only sub-microamp level static current, significantly reducing the system's standby power consumption.

[0069] The hysteresis characteristic of the second Schmitt trigger effectively suppresses the charging and discharging ripple superimposed on the battery terminal voltage and the small voltage jitter caused by load fluctuations, avoiding multiple false triggers caused by ripple near the threshold, ensuring the stability and reliability of the event pulse. The inverter converts the negative falling slope signal into a positive absolute value voltage signal, so that the falling slope intensity can be connected to the subsequent logarithmic amplifier and voltage-controlled oscillator with a uniform signal polarity, simplifying the circuit design and avoiding the need for dual power supply.

[0070] The second logarithmic amplifier performs logarithmic compression on the absolute voltage, ensuring that the input voltage of the second voltage-controlled oscillator remains within the optimal linear operating range under a wide dynamic range of battery voltage drop slope changes from low-current standby to rapid transient drops caused by task execution. This avoids the loss of slope information caused by frequency saturation and ensures accurate characterization of battery voltage transient drop events of different intensities.

[0071] The parallel output of the second event pulse and the second frequency pulse sequence forms a symmetrical time-frequency information pair with the first event pulse and the first frequency pulse sequence generated in step S101. Both use the event pulse to carry time information and the frequency pulse sequence to carry intensity information, providing a unified and accurate time-frequency basis for subsequent event pairing, overlapping time period extraction and frequency correlation judgment, fundamentally ensuring the accuracy and anti-interference capability of wake-up event recognition.

[0072] Step S103: Each first event pulse and the first frequency pulse sequence corresponding to the first event pulse are paired with the second event pulse that appears first after the first event pulse occurs and the second frequency pulse sequence corresponding to the second event pulse to form an event pair.

[0073] In this step, prior to the pairing step, event cleaning is also included: when the duration of any first event pulse or any second event pulse is less than a preset minimum duration threshold, the corresponding event pulse is blocked so that the blocked event pulse does not participate in the pairing.

[0074] Step S104: For each event pair, according to the preset pulse analysis strategy, determine the level overlap period of the first event pulse and the second event pulse. During the level overlap period, convert the pulses in the first frequency pulse sequence and the pulses in the second frequency pulse sequence into charges, and accumulate the converted charges to the same integrating capacitor to obtain the integrated voltage.

[0075] In this step, the first differential voltage amplitude corresponding to the real-time rising slope value when the first event pulse is generated is obtained and denoted as the first slope intensity.

[0076] The amplitude of the second differential voltage after inversion is obtained, which corresponds to the absolute value of the real-time falling slope when the second event pulse is generated, and is denoted as the second slope intensity.

[0077] Calculate the ratio of the first slope intensity to the second slope intensity to obtain the slope intensity ratio;

[0078] The slope intensity ratio is compared with a preset upper threshold and a lower threshold for the intensity ratio;

[0079] When the slope intensity ratio falls into the confidence interval formed by the lower threshold of the intensity ratio and the upper threshold of the intensity ratio, the first event pulse and the second event pulse are logically ANDed to obtain the first overlapping pulse, and the high-level period of the first overlapping pulse is determined as the level overlapping period.

[0080] When the slope intensity ratio does not fall within the confidence interval, the first event pulse is input to the first adjustable delay line to obtain the delayed first event pulse. The delayed first event pulse and the second event pulse are logically ANDed to obtain the second overlapping pulse. The high-level period of the second overlapping pulse is determined as the level overlapping period. The delay time of the first adjustable delay line is dynamically adjusted according to the degree to which the slope intensity ratio deviates from the confidence interval.

[0081] Furthermore, during the level overlap period, the first frequency pulse sequence and the second frequency pulse sequence are input into an XOR gate to obtain an XOR pulse sequence;

[0082] The XOR pulse sequence is converted from frequency to voltage to obtain a difference voltage that characterizes the instantaneous frequency difference between the first frequency pulse sequence and the second frequency pulse sequence.

[0083] The differential voltage is input to the control terminal of the voltage-controlled current source, and the output current of the voltage-controlled current source flows into the integrating capacitor during the level overlap period to accumulate charge. The output current of the voltage-controlled current source is inversely proportional to the differential voltage.

[0084] When the level overlap period ends, the first integrated voltage accumulated by the integrating capacitor under the current event pair is obtained;

[0085] Multiply the second integral voltage corresponding to the previous event pair of the current event pair by the preset forgetting factor to obtain the decay voltage;

[0086] The first integrated voltage is summed with the decayed voltage, and the summation result is used as the integrated voltage corresponding to the current event pair.

[0087] In one specific embodiment, for each paired event pair, the process sequentially performs three stages: determining the level overlap period using a pulse analysis strategy, performing frequency-charge conversion and accumulation during the level overlap period, and recursively updating the integral voltage.

[0088] Phase 1: Determining the Level Overlap Period Based on Slope Intensity Ratio

[0089] The amplitude of the first differential voltage corresponding to the real-time rising slope value at the time of generating the first event pulse is obtained and denoted as the first slope intensity S1. S1 is obtained as follows: at the rising edge of the first event pulse, the amplitude of the first differential voltage is... Sampling is performed, and the sampled value is S1. S1 represents the instantaneous intensity of the rise slope of the wake-up source sensor output voltage.

[0090] The amplitude of the inverted second differential voltage corresponding to the absolute value of the real-time falling slope when the second event pulse is generated is obtained and denoted as the second slope intensity S2. S2 is obtained by taking the absolute value voltage output by the inverter at the rising edge of the second event pulse. Sampling is performed, and the sampled value is S2. S2 characterizes the instantaneous intensity of the slope of the voltage drop at the device's battery terminals.

[0091] Calculate the slope intensity ratio R, R = S1 / S2.

[0092] The slope intensity ratio R is compared with a preset intensity ratio upper limit threshold. Intensity ratio lower threshold Comparison, and This forms a confidence interval. and The setting is based on the charging circuit impedance characteristics of the device's battery. Specifically, under standard test conditions, the ratio range of S1 to S2 in actual wake-up events is measured, and the upper and lower limits of this range are taken as... and .

[0093] When R satisfies At this point, it is determined that the first event pulse and the second event pulse are naturally synchronized in time and have a strong causal relationship. Then, the first event pulse... With the second event pulse Perform a logical AND operation to obtain the first overlapping pulse OV1, and determine the high-level period of the first overlapping pulse OV1 as the level overlapping period OV.

[0094] When R is less than or greater than If a time offset exists between two event pulses, interfering with causal correlation, possibly due to transmission path differences or measurement noise, then the following delay compensation process is performed:

[0095] The first event pulse Input adjustable delay line, delay time of the delay line The adjustment is dynamically based on the degree to which the slope intensity ratio R deviates from the confidence interval. The adjustment relationship is set as follows: calculate the degree of deviation. Delay time ,in This is a preset delay factor. The delay time will be... The first event pulse after that is denoted as .

[0096] The delayed first event pulse With the second event pulse Perform a logical AND operation to obtain the second overlapping pulse OV2, and determine the high-level period of the second overlapping pulse OV2 as the level overlapping period OV.

[0097] The basis for the above delay compensation is that when the slope intensity ratio deviates from the confidence interval, it indicates that the response of the wake-up source sensor side and the response of the device battery side are not completely matched in time. By dynamically adjusting the time shift of the first event pulse, the effective overlap of the two event pulses can cover the overlap period of the real causal response, avoiding the omission or misjudgment of the effective period due to fixed delay or direct overlap.

[0098] Phase Two: Frequency-Charge Conversion and Accumulation

[0099] After determining the overlap period OV, the following frequency-charge conversion and accumulation operations are performed during the time interval when OV is high:

[0100] The first frequency pulse sequence Second frequency pulse sequence Input an XOR gate to perform an XOR logical operation. and When the levels are the same, the XOR output is low; when... and When the voltage levels are different, the XOR output is high. This results in an XOR pulse sequence. ,reflect and The degree of instantaneous frequency inconsistency between the two frequency sequences. When the two frequency sequences are perfectly synchronized... Maintain low level, no pulse output; when there is a frequency difference between the two... The greater the frequency difference in the generation of pulses, The higher the average frequency.

[0101] XOR pulse sequence Perform frequency-to-voltage conversion, the conversion method is: The rising edge of each pulse triggers a monostable pulse with a fixed pulse width. This monostable pulse sequence is then low-pass filtered to obtain the DC differential voltage. . The value and The average frequency is proportional to the average frequency, that is .therefore, The average value representing the instantaneous frequency difference between the first frequency pulse sequence and the second frequency pulse sequence.

[0102] Difference voltage The output current of the voltage-controlled current source is applied to its control terminal. and Satisfies an inverse proportional relationship: ,in As the reference current, This is the normalized voltage constant. When When the frequencies approach zero, i.e., when the two frequency sequences are highly matched, Reaching the maximum value ;when When it increases, Decrease. This inverse relationship means that the higher the frequency matching degree, the greater the charging current and the more charge accumulated.

[0103] During the entire period when the voltage level overlaps (OV is high), the output current of the voltage-controlled current source... Continuous flow into the integrating capacitor C int Integrating capacitor The initial voltage is reset to zero before the start of each event pair. This reset is achieved by the instantaneous activation of the discharge switch connected in parallel with the integrating capacitor, triggered by the event pair's start signal. During the 0V high-level period, the integrating capacitor... Charge accumulation on Integral voltage .

[0104] When the overlapping voltage level period of OV ends, obtain the integrating capacitor. The accumulated voltage value is used as the first integrated voltage of the current event pair. .

[0105] Phase 3: Recursive Integral Voltage Update

[0106] Let the second integral voltage corresponding to the previous event pair of the current event pair be denoted as... For the first event pair, Its initial value is zero.

[0107] The second integral voltage Multiplying by the preset forgetting factor α yields the decay voltage. The forgetting factor α ranges from 0 to 1, with typical α values ​​usually set between 0.3 and 0.7.

[0108] The first integrated voltage With decay voltage Add them together to get the sum. .Will The integrated voltage corresponding to the current event is output to the subsequent comparison and decision-making process.

[0109] Recursive update formula This mechanism achieves an exponentially weighted moving average of the integrated voltage of historical event pairs. The contributions of current event pairs are directly summed, while the contributions of historical event pairs decay exponentially with the event pair number. This mechanism maintains a rapid cumulative response to consecutive matching events while preventing the continued impact of historical anomalous event pairs.

[0110] This step addresses the time asynchrony issue between the wake-up source sensor response and the device battery response caused by transmission path differences and measurement noise in wake-up events through a pulse analysis strategy based on slope intensity ratio judgment and dynamic delay compensation. When the slope intensity ratio falls within the confidence interval, the natural overlap period of the event pulse is directly taken to achieve a rapid response. When the slope intensity ratio deviates from the confidence interval, the delay time is dynamically adjusted according to the degree of deviation to compensate for the time offset before extracting the overlap period, ensuring the accuracy and robustness of the overlap period extraction. This strategy is based on the physical model of sensor-load energy transfer, namely, the sensor rising slope and the battery falling slope have a definite intensity ratio relationship in real wake-up events, fundamentally distinguishing between causal events and random interference events.

[0111] The frequency-to-charge conversion stage uses an XOR gate to extract the frequency difference and an inverse current control method to directly convert the frequency matching degree into the charge accumulation. The higher the matching degree of the two frequency sequences, the smaller the difference voltage, the larger the charging current, and the higher the integral voltage. This mechanism naturally realizes threshold-free continuous quantization of the event pair matching quality in the analog domain, avoiding the resolution limitation of discrete threshold judgment in the digital domain, and can accurately reflect subtle differences in frequency synchronization.

[0112] The recursive integral voltage update introduces a forgetting factor, combining the integral voltage of the current event pair with the decay contribution of historical event pairs, thereby achieving continuous accumulation of decision confidence. Compared with simple N consecutive threshold comparisons, the recursive update mechanism can improve decision reliability through the accumulation of multiple events, while avoiding the hard discarding of historical data. This allows some effective historical confidence to be retained after transient disturbances, accelerating the recovery speed after disturbances, while ensuring high anti-interference capability under steady-state conditions.

[0113] Step S105: Compare the integrated voltage with the preset reference voltage. When the integrated voltage corresponding to each of the N consecutive event pairs is greater than the preset reference voltage, output a wake-up signal to the main control module to switch the main control module from the sleep state to the working state, where N is an integer greater than or equal to 2.

[0114] In summary, the method of this application, when the main control module is in sleep mode, detects the rising slope of the output voltage of the wake-up source sensor. When it exceeds a threshold, a first event pulse is generated and the rising slope value is converted into a first frequency pulse sequence. It also detects the falling slope of the battery voltage. When it exceeds a threshold, a second event pulse is generated and the absolute value of the falling slope is converted into a second frequency pulse sequence. The first event pulse is paired with the first second event pulse to form an event pair. The overlapping period is determined based on the slope intensity ratio. During the overlapping period, the frequency difference is extracted through XOR operation and converted into charge accumulation in the integrating capacitor, recursively updating the integrating voltage. When the integrating voltage of multiple consecutive event pairs exceeds the reference voltage, a wake-up signal is output. Wake-up decision is achieved in the fully analog domain, without the need for an analog-to-digital converter and processor, significantly reducing standby power consumption.

[0115] Please see Figure 2 The diagram shows a structural block diagram of a low-power power supply control system for smart home appliances according to this application.

[0116] like Figure 2 As shown, the low-power power supply control system 200 includes a wake-up source slope detection module 210, a battery slope detection module 220, an event pairing module 230, a pulse analysis module 240, and a decision module 250.

[0117] The wake-up source slope detection module 210 is used to detect the rising slope of the output voltage of the wake-up source sensor. When the rising slope exceeds a preset rising slope threshold, a first event pulse is generated, and the real-time rising slope value is converted into a first frequency pulse sequence during the duration of the first event pulse. The battery slope detection module 220 is used to detect the falling slope of the battery terminal voltage of the device. When the absolute value of the falling slope exceeds a preset falling slope threshold, a second event pulse is generated, and the real-time absolute value of the falling slope is converted into a second frequency pulse sequence during the duration of the second event pulse. The event pairing module 230 is used to pair each first event pulse and the corresponding first frequency pulse sequence with the second event pulse that appears first after the first event pulse and the corresponding second frequency pulse sequence to form an event pair. The pulse analysis module 240 is used to determine the level overlap period of the first event pulse and the second event pulse for each event pair according to a preset pulse analysis strategy, and to analyze the first event pulse and the second event pulse during the level overlap period. Pulses in the frequency pulse sequence and pulses in the second frequency pulse sequence are converted into charges, and the converted charges are accumulated to the same integrating capacitor to obtain an integrated voltage. Specifically, the pulse analysis strategy is as follows: obtain the amplitude of the first differential voltage corresponding to the real-time rising slope value when the first event pulse is generated, and record it as the first slope intensity; obtain the amplitude of the second differential voltage after inversion corresponding to the absolute value of the real-time falling slope when the second event pulse is generated, and record it as the second slope intensity; calculate the ratio of the first slope intensity to the second slope intensity to obtain the slope intensity ratio, and compare the slope intensity ratio with the preset upper limit threshold and lower limit threshold of the intensity ratio, and determine the level overlap period based on the comparison result; the decision module 250 is used to compare the integrated voltage with the preset reference voltage. When the integrated voltage corresponding to each event pair in N consecutive event pairs is greater than the preset reference voltage, a wake-up signal is output to the main control module to switch the main control module from the sleep state to the working state, where N is an integer greater than or equal to 2.

[0118] It should be understood that Figure 2 The modules and references described in the document Figure 1 The steps described in the text correspond to those in the method described above. Therefore, the operations, features, and corresponding technical effects described above also apply to the method described in the text. Figure 2 The various modules in the document will not be described in detail here.

[0119] In other embodiments, the present invention also provides a computer-readable storage medium having a computer program stored thereon, wherein when the program instructions are executed by a processor, the processor performs the low-power power supply control method for smart home appliances in any of the above method embodiments.

[0120] In one embodiment, the computer-readable storage medium of the present invention stores computer-executable instructions, which are configured as follows:

[0121] The rising slope of the output voltage of the wake-up source sensor is detected. When the rising slope exceeds the preset rising slope threshold, a first event pulse is generated, and the real-time rising slope value is converted into a first frequency pulse sequence during the duration of the first event pulse.

[0122] The device detects the rate of decline of the battery terminal voltage. When the absolute value of the rate of decline exceeds a preset rate of decline threshold, a second event pulse is generated. During the duration of the second event pulse, the real-time absolute value of the rate of decline is converted into a second frequency pulse sequence.

[0123] Each first event pulse and the first frequency pulse sequence corresponding to the first event pulse are paired with the second event pulse that appears first after the first event pulse occurs and the second frequency pulse sequence corresponding to the second event pulse to form an event pair.

[0124] For each event pair, according to a preset pulse analysis strategy, the level overlap period between the first event pulse and the second event pulse is determined. During the level overlap period, the pulses in the first frequency pulse sequence and the pulses in the second frequency pulse sequence are converted into charges, and the converted charges are accumulated to the same integrating capacitor to obtain the integrated voltage. Specifically, the pulse analysis strategy is as follows:

[0125] Obtain the first differential voltage amplitude corresponding to the real-time rising slope value when the first event pulse is generated, and denot it as the first slope intensity;

[0126] The amplitude of the second differential voltage after inversion is obtained, which corresponds to the absolute value of the real-time falling slope when the second event pulse is generated, and is denoted as the second slope intensity.

[0127] Calculate the ratio of the first slope intensity to the second slope intensity to obtain the slope intensity ratio, and compare the slope intensity ratio with a preset upper limit threshold and a lower limit threshold for the intensity ratio. Determine the level overlap period based on the comparison result.

[0128] The integrated voltage is compared with a preset reference voltage. When the integrated voltage corresponding to each of the N consecutive event pairs is greater than the preset reference voltage, a wake-up signal is output to the main control module, causing the main control module to switch from the sleep state to the working state, where N is an integer greater than or equal to 2.

[0129] Computer-readable storage media may include a stored program area and a stored data area, wherein the stored program area may store an operating system and an application program required for at least one function; the stored data area may store data created based on the use of a low-power power supply control system for smart home appliances, etc. Furthermore, the computer-readable storage medium may include high-speed random access memory, and may also include memory, such as at least one disk storage device, flash memory device, or other non-volatile solid-state storage device. In some embodiments, the computer-readable storage medium may optionally include memory remotely configured relative to a processor, which can be connected via a network to a low-power power supply control system for smart home appliances. Examples of such networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.

[0130] Figure 3 This is a schematic diagram of the structure of the electronic device provided in the embodiment of the present invention, such as... Figure 3 As shown, the device includes a processor 310 and a memory 320. The electronic device may also include an input device 330 and an output device 340. The processor 310, memory 320, input device 330, and output device 340 can be connected via a bus or other means. Figure 3 Taking a bus connection as an example, the memory 320 is the computer-readable storage medium described above. The processor 310 executes various server functions and data processing by running non-volatile software programs, instructions, and modules stored in the memory 320, thereby implementing the low-power power supply control method for smart home appliances described in the above method embodiment. The input device 330 can receive input digital or character information and generate key signal inputs related to user settings and function control for the low-power power supply control system of smart home appliances. The output device 340 may include a display device such as a screen.

[0131] The aforementioned electronic device can execute the method provided in the embodiments of the present invention, and has the corresponding functional modules and beneficial effects for executing the method. Technical details not described in detail in this embodiment can be found in the method provided in the embodiments of the present invention.

[0132] In one implementation, the above-described electronic device is applied in a low-power power supply control system for smart home appliances, serving as a client, and includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, the instructions being executed by the at least one processor to enable the at least one processor to:

[0133] The rising slope of the output voltage of the wake-up source sensor is detected. When the rising slope exceeds the preset rising slope threshold, a first event pulse is generated, and the real-time rising slope value is converted into a first frequency pulse sequence during the duration of the first event pulse.

[0134] The device detects the rate of decline of the battery terminal voltage. When the absolute value of the rate of decline exceeds a preset rate of decline threshold, a second event pulse is generated. During the duration of the second event pulse, the real-time absolute value of the rate of decline is converted into a second frequency pulse sequence.

[0135] Each first event pulse and the first frequency pulse sequence corresponding to the first event pulse are paired with the second event pulse that appears first after the first event pulse occurs and the second frequency pulse sequence corresponding to the second event pulse to form an event pair.

[0136] For each event pair, according to a preset pulse analysis strategy, the level overlap period between the first event pulse and the second event pulse is determined. During the level overlap period, the pulses in the first frequency pulse sequence and the pulses in the second frequency pulse sequence are converted into charges, and the converted charges are accumulated to the same integrating capacitor to obtain the integrated voltage. Specifically, the pulse analysis strategy is as follows:

[0137] Obtain the first differential voltage amplitude corresponding to the real-time rising slope value when the first event pulse is generated, and denot it as the first slope intensity;

[0138] The amplitude of the second differential voltage after inversion is obtained, which corresponds to the absolute value of the real-time falling slope when the second event pulse is generated, and is denoted as the second slope intensity.

[0139] Calculate the ratio of the first slope intensity to the second slope intensity to obtain the slope intensity ratio, and compare the slope intensity ratio with a preset upper limit threshold and a lower limit threshold for the intensity ratio. Determine the level overlap period based on the comparison result.

[0140] The integrated voltage is compared with a preset reference voltage. When the integrated voltage corresponding to each of the N consecutive event pairs is greater than the preset reference voltage, a wake-up signal is output to the main control module, causing the main control module to switch from the sleep state to the working state, where N is an integer greater than or equal to 2.

[0141] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., including several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods of various embodiments or some parts of embodiments.

[0142] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A low-power power supply control method for smart home appliances, the smart home appliances comprising a wake-up source sensor, a device battery, and a system controller, the system controller comprising a main control module and a low-power power supply control system; characterized in that, The low-power supply control method includes: When the main control module is in sleep mode, the low-power power supply control system performs the following steps: The rising slope of the output voltage of the wake-up source sensor is detected. When the rising slope exceeds the preset rising slope threshold, a first event pulse is generated, and the real-time rising slope value is converted into a first frequency pulse sequence during the duration of the first event pulse. The device detects the rate of decline of the battery terminal voltage. When the absolute value of the rate of decline exceeds a preset rate of decline threshold, a second event pulse is generated. During the duration of the second event pulse, the real-time absolute value of the rate of decline is converted into a second frequency pulse sequence. Each first event pulse and the first frequency pulse sequence corresponding to the first event pulse are paired with the second event pulse that appears first after the first event pulse occurs and the second frequency pulse sequence corresponding to the second event pulse to form an event pair. For each event pair, according to a preset pulse analysis strategy, the level overlap period between the first event pulse and the second event pulse is determined. During the level overlap period, the pulses in the first frequency pulse sequence and the pulses in the second frequency pulse sequence are converted into charges, and the converted charges are accumulated to the same integrating capacitor to obtain the integrated voltage. Specifically, the pulse analysis strategy is as follows: Obtain the first differential voltage amplitude corresponding to the real-time rising slope value when the first event pulse is generated, and denot it as the first slope intensity; The amplitude of the second differential voltage after inversion is obtained, which corresponds to the absolute value of the real-time falling slope when the second event pulse is generated, and is denoted as the second slope intensity. Calculate the ratio of the first slope intensity to the second slope intensity to obtain the slope intensity ratio, and compare the slope intensity ratio with a preset upper limit threshold and a lower limit threshold for the intensity ratio. Determine the level overlap period based on the comparison result. The integrated voltage is compared with a preset reference voltage. When the integrated voltage corresponding to each of the N consecutive event pairs is greater than the preset reference voltage, a wake-up signal is output to the main control module, causing the main control module to switch from the sleep state to the working state, where N is an integer greater than or equal to 2.

2. The low-power power supply control method for smart home appliances according to claim 1, characterized in that, The steps of generating a first event pulse and converting the real-time rising slope value into a first frequency pulse sequence during the duration of the first event pulse include: The output voltage of the wake-up source sensor is differentiated using the first RC differentiating circuit to obtain the first differential voltage; The first differential voltage is input to the first Schmitt trigger, which is a positive feedback comparator circuit with hysteresis characteristics. The positive threshold voltage of the first Schmitt trigger corresponds to a preset rising slope threshold, and the output of the first Schmitt trigger is used as the first event pulse. The first differential voltage is input into the first logarithmic amplifier for compression to obtain the first compressed voltage; The first compression voltage is input to the first voltage-controlled oscillator, and the output of the first voltage-controlled oscillator is used as the first frequency pulse sequence. The instantaneous frequency of the first frequency pulse sequence is proportional to the first compression voltage.

3. The low-power power supply control method for smart home appliances according to claim 1, characterized in that, The steps of generating a second event pulse and converting the absolute value of the real-time falling slope into a second frequency pulse sequence during the duration of the second event pulse include: The second differential voltage is obtained by differentiating the battery terminal voltage using the second RC differentiating circuit. The second differential voltage is input to the second Schmitt trigger, which is a positive feedback comparator circuit with hysteresis characteristics. The absolute value of the negative threshold voltage of the second Schmitt trigger corresponds to a preset falling slope threshold. The output of the second Schmitt trigger serves as the second event pulse. Invert the second differential voltage to obtain an absolute voltage that is proportional to the absolute value of the falling slope; The absolute voltage is input into a second logarithmic amplifier for compression to obtain a second compressed voltage; The second compression voltage is input to the second voltage-controlled oscillator, and the output of the second voltage-controlled oscillator is used as the second frequency pulse sequence. The instantaneous frequency of the second frequency pulse sequence is proportional to the second compression voltage.

4. A low-power power supply control method for smart home appliances according to claim 1, characterized in that, Prior to the pairing step, an event cleaning step is also included: When the duration of any first event pulse or any second event pulse is less than the preset minimum duration threshold, the corresponding event pulse is blocked, so that the blocked event pulse does not participate in pairing.

5. A low-power power supply control method for smart home appliances according to claim 1, characterized in that, Determining the overlapping time period based on the comparison result includes: When the slope intensity ratio falls into the confidence interval formed by the lower threshold of the intensity ratio and the upper threshold of the intensity ratio, the first event pulse and the second event pulse are logically ANDed to obtain the first overlapping pulse, and the high-level period of the first overlapping pulse is determined as the level overlapping period. When the slope intensity ratio does not fall within the confidence interval, the first event pulse is input to the first adjustable delay line to obtain the delayed first event pulse. The delayed first event pulse and the second event pulse are logically ANDed to obtain the second overlapping pulse. The high-level period of the second overlapping pulse is determined as the level overlapping period. The delay time of the first adjustable delay line is dynamically adjusted according to the degree to which the slope intensity ratio deviates from the confidence interval.

6. A low-power power supply control method for smart home appliances according to claim 1, characterized in that, The step of converting pulses in the first frequency pulse sequence and pulses in the second frequency pulse sequence into charges during the level overlap period, and accumulating the converted charges to the same integrating capacitor to obtain the integrated voltage includes: During the level overlap period, the first frequency pulse sequence and the second frequency pulse sequence are input into an XOR gate to obtain an XOR pulse sequence; The XOR pulse sequence is converted from frequency to voltage to obtain a difference voltage that characterizes the instantaneous frequency difference between the first frequency pulse sequence and the second frequency pulse sequence. The differential voltage is input to the control terminal of the voltage-controlled current source, and the output current of the voltage-controlled current source flows into the integrating capacitor during the level overlap period to accumulate charge. The output current of the voltage-controlled current source is inversely proportional to the differential voltage. When the level overlap period ends, the first integrated voltage accumulated by the integrating capacitor under the current event pair is obtained; Multiply the second integral voltage corresponding to the previous event pair of the current event pair by the preset forgetting factor to obtain the decay voltage; The first integrated voltage is summed with the decayed voltage, and the summation result is used as the integrated voltage corresponding to the current event pair.

7. A low-power power supply control system for a smart home appliance, the smart home appliance comprising a wake-up source sensor, a device battery, and a system controller, the system controller comprising a main control module and a low-power power supply control system; characterized in that, The low-power supply control system includes: The wake-up source slope detection module is used to detect the rising slope of the output voltage of the wake-up source sensor. When the rising slope exceeds the preset rising slope threshold, a first event pulse is generated, and the real-time rising slope value is converted into a first frequency pulse sequence during the duration of the first event pulse. The battery slope detection module is used to detect the rate of decline of the battery terminal voltage of the device. When the absolute value of the rate of decline exceeds the preset rate of decline threshold, a second event pulse is generated, and within the duration of the second event pulse, the real-time absolute value of the rate of decline is converted into a second frequency pulse sequence. The event pairing module is used to pair each first event pulse and the first frequency pulse sequence corresponding to the first event pulse with the second event pulse that appears first after the first event pulse occurs and the second frequency pulse sequence corresponding to the second event pulse to form an event pair. The pulse analysis module is used to determine the level overlap period between the first event pulse and the second event pulse for each event pair according to a preset pulse analysis strategy. During the level overlap period, the pulses in the first frequency pulse sequence and the pulses in the second frequency pulse sequence are converted into charges, and the converted charges are accumulated to the same integrating capacitor to obtain the integrated voltage. The pulse analysis strategy is specifically as follows: Obtain the first differential voltage amplitude corresponding to the real-time rising slope value when the first event pulse is generated, and denot it as the first slope intensity; The amplitude of the second differential voltage after inversion is obtained, which corresponds to the absolute value of the real-time falling slope when the second event pulse is generated, and is denoted as the second slope intensity. Calculate the ratio of the first slope intensity to the second slope intensity to obtain the slope intensity ratio, and compare the slope intensity ratio with a preset upper limit threshold and a lower limit threshold for the intensity ratio. Determine the level overlap period based on the comparison result. The decision module is used to compare the integrated voltage with a preset reference voltage. When the integrated voltage corresponding to each of the N consecutive event pairs is greater than the preset reference voltage, a wake-up signal is output to the main control module to switch the main control module from the sleep state to the working state, where N is an integer greater than or equal to 2.

8. A low-power power supply control system for smart home appliances according to claim 7, characterized in that, The wake-up source slope detection module includes a first RC differentiating circuit, a first Schmitt trigger, a first logarithmic amplifier, and a first voltage-controlled oscillator. The first Schmitt trigger is a positive feedback comparator circuit with hysteresis characteristics. The output of the first RC differentiating circuit is connected to both the input of the first logarithmic amplifier and the input of the first Schmitt trigger. The output of the first logarithmic amplifier is connected to the control terminal of the first voltage-controlled oscillator. The output of the first voltage-controlled oscillator is a first frequency pulse sequence, and the output of the first Schmitt trigger is a first event pulse. The battery slope detection module includes a second RC differentiating circuit, a second Schmitt trigger, an inverter, a second logarithmic amplifier, and a second voltage-controlled oscillator. The second Schmitt trigger is a positive feedback comparator circuit with hysteresis characteristics. The output of the second RC differentiating circuit is connected to the input of the second Schmitt trigger and also to the input of the inverter. The output of the inverter is connected to the input of the second logarithmic amplifier. The output of the second logarithmic amplifier is connected to the control terminal of the second voltage-controlled oscillator. The output of the second voltage-controlled oscillator is a second frequency pulse sequence, and the output of the second Schmitt trigger is a second event pulse.

9. An electronic device, characterized in that, include: At least one processor, and a memory communicatively connected to the at least one processor, wherein the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method according to any one of claims 1 to 6.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the program is executed by a processor, it implements the method described in any one of claims 1 to 6.

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