CN-121097979-B - Dual detection-based wireless charging equipment awakening method and circuit

CN121097979BCN 121097979 BCN121097979 BCN 121097979BCN-121097979-B

Abstract

The application relates to a wireless charging equipment awakening method and a circuit based on double detection, wherein the awakening method comprises the steps of executing a digital Q value detection flow, outputting a corresponding first detection result, judging whether the first detection result exceeds a first preset threshold range, if the first detection result does not exceed the first preset threshold range, executing an analog PING detection flow, outputting a corresponding second detection result, judging whether the second detection result exceeds a second preset threshold range, if the second detection result does not exceed the second preset threshold range, reentering a deep sleep mode, and executing a corresponding awakening flow, wherein the two detection results act together, so that a system can maintain awakening judgment only by executing digital detection with extremely low power consumption under most conditions, and enters a high-precision detection stage when uncertainty exists, thereby realizing the intelligent awakening effect with high reliability, low false triggering rate and extremely low standby power consumption under complex environments.

Inventors

LIU HAO
FENG JUNPENG
LIN JINYUAN

Assignees

深圳市卓芯微科技有限公司

Dates

Publication Date: 20260508
Application Date: 20251111

Claims (9)

1. The wireless charging equipment awakening method based on the double detection is characterized by comprising the following steps of: after the wireless charging equipment in the deep sleep mode detects the primary trigger signal, executing an initialization flow, judging whether the primary trigger signal is an explicit external interrupt signal, and executing a corresponding wake-up flow if the primary trigger signal is the explicit external interrupt signal; if the external interrupt signal is not clear, executing a digital Q value detection flow, outputting a corresponding first detection result, judging whether the first detection result exceeds a first preset threshold range, and if so, executing a corresponding wake-up flow; If the first preset threshold range is not exceeded, executing the simulation PING detection flow, outputting a corresponding second detection result, judging whether the second detection result exceeds the second preset threshold range, if the second detection result does not exceed the second preset threshold range, re-entering the deep sleep mode, and if the second detection result exceeds the second preset threshold range, executing a corresponding wake-up flow; When the corresponding wake-up flow needs to be executed, the wireless charging equipment is controlled to be switched from the deep sleep mode to the working mode; the step of dynamically adjusting the first preset threshold range includes: In a preset detection period, recording a plurality of first detection results and a first difference data sequence corresponding to the first detection results, wherein the first difference data sequence is a data set of differences between the plurality of first detection results and a corresponding first preset threshold range; And carrying out average processing on the first difference data sequence to generate a corresponding first average offset, comparing the first average offset with a current first preset threshold range, shrinking the first preset threshold range if the first average offset is continuously lower than the lower limit of the current first preset threshold range, and expanding the first preset threshold range if the first average offset is continuously higher than the upper limit of the current first preset threshold range.
2. The method for waking up a wireless charging device based on dual detection according to claim 1, wherein the step of executing the digital Q value detection procedure comprises: Applying a corresponding enabling pulse signal to a resonance unit in the wireless charging equipment so as to enable the resonance unit to enter a free oscillation state; acquiring an oscillation waveform generated due to a free oscillation state, and detecting and recording detection characteristic parameters in the oscillation waveform, wherein the detection characteristic parameters at least comprise a low-level duration time and a high-level duration time; and comparing the detection characteristic parameter with a preset reference parameter, and determining a difference value generated by comparison as a first detection result.
3. The dual detection-based wireless charging device wake-up method of claim 2, wherein the step of detecting and recording detection characteristic parameters in the oscillating waveform, the detection characteristic parameters including at least a low level duration and a high level duration, comprises: based on a built-in timing counting unit, circularly recording the level state of the oscillating waveform in each oscillating period; Starting low level counting and accumulating corresponding low level duration time when the oscillating waveform is detected to be at a low level; Starting high level counting and accumulating corresponding high level duration time when detecting that the oscillation waveform is converted into high level; And when the amplitude of the oscillation waveform naturally decays below a preset voltage threshold value and no new level inversion is triggered any more, terminating the counting operation of the timing counting unit.
4. The method for waking up a wireless charging device based on dual detection according to claim 1, wherein the step of simulating a PING detection flow comprises: measuring a reference voltage signal of a resonance unit in the wireless charging device in a non-excited state; generating an excitation signal with preset frequency, applying the excitation signal to the resonance unit, and acquiring a response voltage signal of the resonance unit after the excitation signal is applied; and calculating a signal difference value of the reference voltage signal and the response voltage signal, and determining the signal difference value as a corresponding second detection result.
5. The method for waking up a wireless charging device based on dual detection according to claim 1, wherein the step of re-entering the deep sleep mode if the second preset threshold range is not exceeded comprises: If the digital Q value detection flow and the analog PING detection flow do not exceed a second preset threshold range, judging whether a new clear external interrupt signal appears in the execution period of the digital Q value detection flow and the analog PING detection flow; If a new clear external interrupt signal appears, executing a corresponding wake-up flow; if no new explicit external interrupt signal occurs, the deep sleep mode is re-entered.
6. A wireless charging equipment awakening circuit based on double detection, which is characterized by using the wireless charging equipment awakening method based on double detection as claimed in any one of claims 1-5, wherein the awakening circuit comprises a wireless charging control module and a main control module, and the wireless charging control module comprises a resonance unit, a driving chip U4 and a sampling unit; The instantaneous enabling driving end of the driving chip is connected with the instantaneous enabling signal output end of the main control module, the pulse width modulation signal input end of the driving chip is connected with the pulse width modulation signal output end of the main control module, and the control signal output end of the driving chip is connected with the control signal input end of the resonance unit so that the main control module controls the driving chip to execute a digital Q value detection process or an analog PING detection process; The resonance unit is used for executing wireless charging of the wireless charging equipment, the sampling signal output end of the resonance unit is connected with the signal input end of the sampling unit, and the signal output end of the sampling unit is connected with the sampling signal input end of the driving chip U4 so as to judge whether to wake up the wireless charging equipment in the deep sleep mode.
7. The wireless charging device wake-up circuit based on dual detection according to claim 6, wherein the resonance unit comprises a capacitor group formed by connecting a capacitor C53, a capacitor C55, a capacitor C56 and a capacitor C58 in parallel and a coil CL1, the control signal output end of the driving chip comprises a pin SW1 and a pin SW2, the first end of the capacitor group is connected with the pin SW1, the second end of the capacitor group is connected with the first end of the coil CL1, and the second end of the coil CL1 is connected with the pin SW 2.
8. The wireless charging device wake-up circuit based on dual detection according to claim 6, wherein the sampling unit comprises a capacitor C29, a capacitor C32, a capacitor C33, a resistor R34, a resistor R36 and a diode D5, wherein an anode terminal of the diode D5 is connected to the sampling signal output terminal of the resonant unit, a cathode terminal of the diode D5 is connected to the first terminal of the resistor R33, a second terminal of the resistor R33 is connected to the first terminal of the resistor R34, a second terminal of the resistor R34 is connected to the first terminal of the capacitor C29, a second terminal of the capacitor C29 is connected to the first channel resonance detection terminal of the driving chip U4, the resistor R36 is connected between a common node between the second terminal of the resistor R33 and the first terminal of the resistor R34 and ground, the capacitor C33 is connected between another common node between the second terminal of the resistor R33 and the first terminal of the resistor R34, and the common node between the second terminal of the resistor C34 and the capacitor C32 is connected between the first terminal of the resistor C29 and the common node.
9. The wireless charging device wake-up circuit based on dual detection according to claim 8, wherein the sampling unit further comprises a resistor R29 and a resistor R30, a first end of the resistor R29 is connected to the sampling signal output end of the resonant unit, a second end of the resistor R29 is connected to the first end of the resistor R30, a second end of the resistor R30 is grounded, and a common node between the second end of the resistor R29 and the first end of the resistor R30 is connected to the second channel resonance detection end of the driving chip U4.

Description

Dual detection-based wireless charging equipment awakening method and circuit Technical Field The application relates to the technical field of wireless charging awakening, in particular to a wireless charging equipment awakening method and circuit based on double detection. Background Currently, with the development of wireless charging technology, magnetic wireless charging devices are widely used due to portability and usability. In order to prolong the battery endurance time, the existing wireless charger usually enters a deep sleep or shutdown state when not used for a long time, and can be used after being awakened in a certain mode. The existing wake-up mode mainly comprises mechanical key wake-up, capacitive touch wake-up and single sensor wake-up. The mechanical key wakeup needs a physical structure, is inconvenient to operate, is easily influenced by factors such as humidity and sweat, and has high false touch rate, and the single sensor such as an optical sensor or an acceleration sensor has insufficient reliability in a complex environment, so that the problem of false wakeup or incapability of wakeup easily occurs. The existing wake-up mode has low reliability, a single detection means is easy to misjudge under the conditions of in-package, shielding or environmental change, and secondly, the power consumption and the sensitivity are difficult to be compatible, and the high-sensitivity detection is often accompanied with high power consumption to influence the standby time. Therefore, an intelligent wake-up scheme capable of realizing high reliability and high sensitivity under the condition of low power consumption is urgently needed, so that the stability and the user experience of the wireless charging equipment under a complex environment are improved. Disclosure of Invention The application provides a wireless charging equipment awakening method and circuit based on double detection, which are used for solving the problem that the existing wireless charging equipment cannot realize intelligent equipment awakening with high reliability and high sensitivity under the condition of low power consumption. The wireless charging equipment awakening method based on the double detection comprises the following steps of: after the wireless charging equipment in the deep sleep mode detects the primary trigger signal, executing an initialization flow, judging whether the primary trigger signal is an explicit external interrupt signal, and executing a corresponding wake-up flow if the primary trigger signal is the explicit external interrupt signal; if the external interrupt signal is not clear, executing a digital Q value detection flow, outputting a corresponding first detection result, judging whether the first detection result exceeds a first preset threshold range, and if so, executing a corresponding wake-up flow; If the first preset threshold range is not exceeded, executing the simulation PING detection flow, outputting a corresponding second detection result, judging whether the second detection result exceeds the second preset threshold range, if the second detection result does not exceed the second preset threshold range, re-entering the deep sleep mode, and if the second detection result exceeds the second preset threshold range, executing a corresponding wake-up flow; and when the corresponding wake-up flow is required to be executed, controlling the wireless charging equipment to switch from the deep sleep mode to the working mode. Through adopting above-mentioned technical scheme, through setting up dual detection mechanism, make wireless charging equipment can carry out the fine judgement according to different detection levels after the degree of depth sleep, realize the reliable discernment of external triggering under the extremely low condition of consumption to effectively reduce the probability of mistake awakening and leaking awakening under the complex environment. Preferably, the executing step of the digital Q value detection flow includes: Applying a corresponding enabling pulse signal to a resonance unit in the wireless charging equipment so as to enable the resonance unit to enter a free oscillation state; acquiring an oscillation waveform generated due to a free oscillation state, and detecting and recording detection characteristic parameters in the oscillation waveform, wherein the detection characteristic parameters at least comprise a low-level duration time and a high-level duration time; and comparing the detection characteristic parameter with a preset reference parameter, and determining a difference value generated by comparison as a first detection result. By adopting the technical scheme, the instantaneous enabling pulse is applied to the resonance unit and the free oscillation waveform is acquired, so that the resonance state change is quantized in a digital mode in a very short time, and the detection result with low power consumption and representativeness i